| Play at ?? if you dare... | translate this |
| Black does not need another move. | translate this |
| Almost correct. | translate this |
| Bad luck. | translate this |
| Can you imagine that Go Seigen read out all of this when he played A? | translate this |
| Can White connect her groups and live? | translate this |
| Please be reasonable. | translate this |
| Black to make the most of it. | translate this |
| White can make two eyes now. | translate this |
| Even though White A does give a ko, White can't expect to win it as it is a 9 step ko. | translate this |
| Ko is failure. | translate this |
| And Black has sente to play this kakari. (He still lost the game though.) | translate this |
| White cannot connect at A. | translate this |
| What is the final result? | translate this |
| Black got the maximum profit in sente. | translate this |
| Black incurred a loss. | translate this |
| Black tenukis, then White plays at 'a', Black B, White C, and Black tenukis again. Black gains two moves elsewhere. | translate this |
| Too good for Black, allowing Black to gain 2 points for his overplay. | translate this |
| The correct extension: not too far, not too close. | translate this |
| Much too close. The stones are not efficient. | translate this |
| This is too far. Black has a serious weakness at A. | translate this |
| Connecting at A is not standard, but I can't find a refutation. Could this make B sente? | translate this |
| This helps White in the fighting. | translate this |
| White is off the hook. | translate this |
| From previous problem. What if White tries this instead? | translate this |
| So do I. ;-) | translate this |
| Oh, dear. | translate this |
| Probably best for White. | translate this |
| Black cannot make 2 eyes here. | translate this |
| What is White's best endgame play in the corner? | translate this |
| White can choose to turn the corner into a seki or a ko. | translate this |
| Please do not play at A. | translate this |
| White prevents the two marked stones from escaping, and can play A in sente. | translate this |
| The correct idea, but there is a better move. | translate this |
| Black to live in the best way. | translate this |
| Tricked at the last second. | translate this |
| Unreasonable for White. | translate this |
| Locally better for Black but not unplayable if you really want sente. | translate this |
| Please assume the L14 ladder to be good for White. | translate this |
| Okay, so far so good, but how would you answer if White plays here? | translate this |
| Bad style. | translate this |
| At best the corner will become a gote seki for Black so White is free to harass the Black group with A and B. | translate this |
| Please see next problem for how to answer. | translate this |
| Black needs 2 moves on the outside so he's in trouble. | translate this |
| This fight will be too much for Black. | translate this |
| Black just helps White strengthen himself. | translate this |
| White moves out at a leisurely pace and Black isn't even 100% alive in the upper right. | translate this |
| White moves out easily and Black still has to worry about the cut at A. | translate this |
| White just played A. How to answer? | translate this |
| Please see the next problem for why this is wrong. | translate this |
| This ko will be a lot of trouble for White. | translate this |
| Black can't be killed because of the weakness at A. | translate this |
| White is in trouble as he can't play the ko. | translate this |
| Bad shape for White. | translate this |
| Black played A. How to answer? | translate this |
| White just played A instead of the correct move at B. How to punish him? | translate this |
| Black to start a ko for everything. | translate this |
| Though this captures the stones, it's bad shape. D2 is better. | translate this |
| White plasters Black on the outside. | translate this |
| Black is toast at A or B. Can only save one. | translate this |
| Bad exchange for Black. | translate this |
| White gets good shape. | translate this |
| How does Black continue after 8? | translate this |
| White can live? | translate this |
| White to live or break out of the encirclement. Please play the tesuji combination as soon as you can. | translate this |
| Probably best for Black. | translate this |
| Can White live? | translate this |
| Black can play A or B next. | translate this |
| Complicated, but bad for White. | translate this |
| You wanna try a trick move, eh? | translate this |
| Gives White weaknesses. | translate this |
| This helps Black. | translate this |
| Helps Black. | translate this |
| Helping Black. | translate this |
| Too weak. | translate this |
| Now White cannot cross under. | translate this |
| How to continue for White? | translate this |
| Black is leading. | translate this |
| Almost 100%. | translate this |
| Now how to finish playing in the center? | translate this |
| Black can actually do better than this. | translate this |
| A good beginning but now what? | translate this |
| White is getting too big a moyo on the left. | translate this |
| White is too big on the left. | translate this |
| White is leading. | translate this |
| Black to play optimally. Please consider each move very carefully. Warning: difficult problem! | translate this |
| White lives by double ko. Black cannot win this. | translate this |
| Ko for life. | translate this |
| White's best move in the corner? | translate this |
| How does Black kill this monstrosity? | translate this |
| Black cannot play at A. | translate this |
| Not the best ko for White. | translate this |
| White to get the best ko. | translate this |
| Two fake eyes, but alive. | translate this |
| White to live. Can you get two eyes? | translate this |
| See the next problem for Black's answer. | translate this |
| White gains nothing from this exchange. | translate this |
| White has a critical weakness at A. | translate this |
| This is too easy on Black. | translate this |
| White is behind. | translate this |
| Ishida wouldn't be happy with this result. | translate this |
| This only helps Black. | translate this |
| White has a weakness at A. | translate this |
| Black is doing fine. | translate this |
| Very bad as White's corner is greatly diminished and his group isn't even 100% alive. | translate this |
| White has bad shape and can't do anything special. | translate this |
| White is heavy. | translate this |
| White to play an interesting combination. | translate this |
| This dangerous-looking ko is the best option Black has. | translate this |
| White has a good strong shape. | translate this |
| Black has to look after the marked group. | translate this |
| Black is in bad trouble. | translate this |
| Black's lower right group doesn't look too happy. | translate this |
| Once again Black's lower right roup is in danger. | translate this |
| Black to answer White's odd looking move at A. | translate this |
| Bad ko for White. | translate this |
| White to win the semeai. Please always start at A if playing on that side. | translate this |
| Black links up her stones. | translate this |
| Black leaves bad aji. | translate this |
| Black's best move on the right side? | translate this |
| White can catch some Black stones. | translate this |
| Play at A please. | translate this |
| White to live. Please start at A, B, or C. | translate this |
| Now the marked Black stone looks useless. | translate this |
| Black can now capture 3 White stones. | translate this |
| Black to move. | translate this |
| Seki in gote. | translate this |
| A non-standard way of connecting, leaving the peep at A, but I can't say that it's wrong here. | translate this |
| White loses 2 points. | translate this |
| A ko appeared in White's territory. | translate this |
| How should White answer Black 1? | translate this |
| White's best move? | translate this |
| White to win. | translate this |
| Pressure on this group helps White, and this helps protect the upper-left. | translate this |
| Good idea but slightly too slow. | translate this |
| Best point for White? | translate this |
| Success! | translate this |
| However, note that Q5 is two points bigger. | translate this |
| However, note that Q5 is 2 points bigger. | translate this |
| Wrong. | translate this |
| Also correct. | translate this |
| Probably the best continuation for White, although Q3 may wait for endgame. | translate this |
| I suppose you live, but what did you do to the bottom? That was horrible! | translate this |
| Well, Black lives, but that loss on the lower side is large and unnecessary. | translate this |
| Ko. White has enough liberties and some big threats. | translate this |
| White is alive too. | translate this |
| Sneaky :) | translate this |
| Rub it in! | translate this |
| The larger part of the White group lives. | translate this |
| Much too small. We are trying to kill the White group here! | translate this |
| White lives easily. | translate this |
| Can White save his stones? | translate this |
| This area is the biggest part of the board, because of the directions of the corner enclosures. | translate this |
| This area is the biggest part of the board, because of the directions of the corner enclosures. If White plays A Black can expand his moyo with one of the moves at B. | translate this |
| This area is the biggest part of the board, because of the directions of the corner enclosures. If White plays A Black can respond at Q or play B, White C and D. | translate this |
| And Black can play around A. (Please note that it's not impossible for White to omit 4.) | translate this |
| The Black shoulder-hit is a special strategy. As long as your treat it lightly Black will be okay. | translate this |
| The shimari (corner-enclosure) is certainly big, yet White 2 is generally even bigger. | translate this |
| If you can keep sente and switch to A this is okay, but White may have other plans. | translate this |
| This is a little dubious. Because White has more stones on the left, he might get sente and play A. | translate this |
| Although a good move as far as the upper part is concerned, White is free to play at A now. | translate this |
| Please play the biggest point on the board. | translate this |
| Black is doing well. | translate this |
| Now Black has prevented the cut while going along with the natural flow of the game. | translate this |
| This cutting is no good as the subsequent fighting is unclear. You should be happy if White defends here. | translate this |
| Black is in trouble. | translate this |
| Black accomplishes nothing. He strengthens White yet he still has to prevent White from cutting at A. | translate this |
| The 2nd best move. It is a little restrained but at least Black is strong now. | translate this |
| Black should somehow have prevented this cut. He's in trouble now. | translate this |
| Black 1 is off the mark; this cut is very severe. | translate this |
| This (or A) is an important point in any fuseki and should be played as soon as possible. The follow-ups are B and C. Please note that the Black 'wall' is 3 stones high. | translate this |
| This is the smaller side because the Black 'wall' is only 2 stones high. | translate this |
| This (or A) is an important point in any fuseki and should be played as soon as possible. B is the follow-up. Please note that the Black 'wall' is 3 stones high. | translate this |
| What is the biggest extension? | translate this |
| This is a solid move that denies White any severe attack on any of the Black stones. | translate this |
| This is too close to the White thickness. If White invades at A, Black 1 will have trouble connecting to the Black corner. | translate this |
| This is too close to the White thickness. If White invades at A, Black 1 will come under a severe attack. | translate this |
| This is too close to the White thickness. If White invades around A, Black 1 will come under a severe attack. | translate this |
| White has a nice move at A. | translate this |
| White has a nice move at A or he might cause some trouble by attaching at B. Black played too loose. | translate this |
| Black to play the best extension. | translate this |
| This high move combines well with the Black corner enclosure and keeps White's moyo in check. | translate this |
| Black is falling behind as the White moyo on the left is getting too big. | translate this |
| White keeps Black low while building up his moyo. | translate this |
| White can play here if he wants to, pressing Black low while at the same time increasing his moyo. | translate this |
| This move is a pincer+extension and is therefore very big. For that reason White most often plays the marked stone around A. | translate this |
| This is bad for multiple reasons: 1) White can push at A forcing Black into an overly low position on the left. 2) White can play an extension along the right at B to prevent a Black pincer + extension. | translate this |
| White will be happy to play at A preventing a Black pincer+extension there. | translate this |
| And White will be happy having somehow reduced the effectiveness of the Black kosumi (marked). | translate this |
| Perfect for White as he has prevented Black from playing a pincer+extension on the right and has forced Black into an unbearably low position on the bottom. | translate this |
| Black is too low at the bottom. | translate this |
| This cut is probably uneasonable for Black. | translate this |
| White just played the marked stone in the so called Shusaku-fuseki. Now where should Black play? | translate this |
| This move prevents a Black move at this point, which would be an ideal extension from the corner-enclosure. | translate this |
| White 1 is non-urgent. Black 2 is big. | translate this |
| White 1 is uninteresting as the left side is small because of the low position of the marked Black stone. (Even if it were at A, Black 2 would still be the spot for White.) | translate this |
| This move is not really possible without stones at A and/or B. Check out Ishida Yoshio's 'Dictionary of Basic Joseki' part 1 for some variations concerning this move. | translate this |
| This move strikes the right balance with the lower right corner. | translate this |
| This move makes the lower side too low for Black. | translate this |
| Bad. Black has a critical weakness at A. If the marked exchange had not been played however, this move would have been all right. Please navigate Black D to see why this exchange is bad. | translate this |
| Surely Black would have preferred not to have made the marked exchange now. | translate this |
| White could also play at A but this suffices to show why the marked exchange is bad. | translate this |
| Whatever White plays, the marked exchange will be a loss for Black. | translate this |
| The marked exchange is a terrible one for Black. | translate this |
| Black has no approach move on the left that helps building the potential of the mrked Black stone. | translate this |
| Kajiwara Takeo thinks the game is already lost for White as Black's stones are neatly working together in controlling the center. | translate this |
| What is the right komoku (3-4 point) for White? | translate this |
| If White A, Black B and vice versa. If White C, Black D, E, F and Black has closed the upper side. | translate this |
| The marked White stone retains some potential and the 2 space extension acts as a wedge between the Black forces. | translate this |
| Black 2 is off the mark as he can't make a 2 space extension on the left. If you want to go in, D would be the proper move. | translate this |
| This move is simply perfect for White. Black 1 is a little slack. | translate this |
| The second best move. | translate this |
| This move helps the marked Black stone from a distance while building territory on the right. | translate this |
| This move is too passive as White can play at A now. | translate this |
| The marked exchange isn't necessarily a good one for Black, so you should play a move that makes it one. | translate this |
| A good move yet there's an even better one. | translate this |
| White should be happy with this result as it defends the weak spot at A. | translate this |
| White takes the initiative on the upper side. | translate this |
| This is really too small. It isn't even sente. | translate this |
| Black has no obvious answer to this move as both the left and lower sides are uninteresting, because of the low positions of the marked stones. | translate this |
| The normal move. Certainly playable yet White had the chance to make the game difficult for Black. | translate this |
| Although a nice looking move, it isn't very good. Black is too strong on the upper side, as the marked points are sente. Black has sente to play at the big lower side. | translate this |
| And White feels a little bit cramped on the left. | translate this |
| This move is small as the side is open at A. | translate this |
| This point would be a very nice move for Black so preventing it is big. | translate this |
| This Black move is really too good to allow as Black's moyo is getting too big. It's almost closed around Q and Black can look forward to playing A and B. | translate this |
| White 1 is uncalled for. Black will now be able to build good thickness. Please note that White cannot play at A now as both ladders are good for Black. | translate this |
| White 1 is simply too small. | translate this |
| White 1 is too early. Black will play here and White will be in for a difficult fight. | translate this |
| Black controls too much of the center, as he has good moves at A and B. | translate this |
| White is weak. | translate this |
| If you want to invade at all you should do so at H as this puts more pressure on the marked Black stones. | translate this |
| It's a little early to invade here. Black doesn't have a good local reply to White A, so playing there might be better. | translate this |
| White played 1. How to keep the marked stones connected and not closed in? | translate this |
| White responds to 1 at 2. How to save the marked stones? | translate this |
| Now we can see how the two marked stones works together. | translate this |
| Black 1 makes good use of the marked stone. | translate this |
| Black to attack. | translate this |
| Correct. Blocking at R16 works in conjunction with the marked stones to create the ideal moyo on the right side. | translate this |
| The three marked stones are meant for creating a moyo at the right side, but this sequence emphasizes the top side instead. Also, the area at A is still left open for White. | translate this |
| Which move, A or B, is the correct answer for the 3-3 invasion? | translate this |
| The ideal extension to check White's expansion, and yet not too near its thickness. | translate this |
| This extension is too far. Black loses territory and the two marked stones limit Black's influence. | translate this |
| This is the worst choice. The marked stone is too near White's thickness and gets attacked by White instead. | translate this |
| This move is too conservative. White can play at A and get a fairly big territory at the top. | translate this |
| If White is allowed to play at E, then White has a huge moyo at the top and the Black's upper right corner is threathened. (Black to choose a point from A to E.) | translate this |
| Creates a common base for the marked stones, and creates a moyo on the left side. | translate this |
| The correct idea, but on the low side. White can reduce Black's influence by playing at A. | translate this |
| The marked stones lose their base and come under attack. Black's moyo on the right side will be affected. | translate this |
| Blocking at R16 works in conjunction with the marked stone to create an ideal moyo on the right side. | translate this |
| White runs into Black's moyo on the right side, and the position of the marked stone is odd. | translate this |
| Block at A or B? | translate this |
| Wrong, as the lower Black group isn't helping the upper hoshi (4-4) stones in building influence. | translate this |
| Now how to play in the lower left? | translate this |
| Wrong. Black is building thickness in the lower left corner so he should play high to make the most of it. | translate this |
| This White move counters the strength of the marked Black stones. | translate this |
| A strange place to tenuki, yet if you are sure that White occupies the last empty corner, this is okay. | translate this |
| Black controls the center. | translate this |
| And White is in big trouble. | translate this |
| Please navigate G for why this move isn't correct. | translate this |
| Please return to the starting position and navigate G to find out why this move isn't correct. | translate this |
| The marked Black stone (triangle) or any other marked point is in a slightly awkward position since the other marked stone (square) is so low. Also Black is rather concentrated on the left. | translate this |
| White has somehow prevented Black from utilizing his shimari. | translate this |
| Black to make the most of his shimari (corner-enclosure). | translate this |
| This 3-4 point makes good balance with the stone in the upper right. | translate this |
| Wrong. Black is too low on the right. Also White will get a nice move at one of the A's. Both are moves that combine well with the White star point on the left. | translate this |
| Which komoku in the lower right corner is best, A or B? (Komoku means 3-4 point.) | translate this |
| White achieves nothing. | translate this |
| You might be able to make life here but it will surely be profitable for Black. | translate this |
| Black has played an irregular enclosure at the top. If he is allowed to play at A, it will almost be a fortress. How to prevent this from happening? | translate this |
| Other pincers or an extension along the left are also playable. | translate this |
| This pincer combines too nicely with the marked Black stone. | translate this |
| Better than A but Black B (or thereabouts) is still a good point for him. | translate this |
| And White is in for a hard fight. Please note that the marked Black stone is in an ideal position. | translate this |
| Black 9 was possible because the ladder at A is good for Black now. | translate this |
| This is locally much better for Black. He can play A and B or just play the big move at C. | translate this |
| Black could have done better. | translate this |
| This move is too low. | translate this |
| Almost correct. Black G is just a little better. | translate this |
| This move is too close. White can easily play tenuki (elsewhere) at A, since the marked White stone is very light. | translate this |
| Now White has a stable group on the right. This is not very attractive for Black. | translate this |
| Black to make the most of his shimari. | translate this |
| Black can now play at A. If Black wants to reinforce the lower side he can play B, White C and D. | translate this |
| If White ignores Black 1, Black can play here and take a big lower side. | translate this |
| White keeps Black's moyo in check while increasing his own. | translate this |
| Black to make his moyo as big as possible. | translate this |
| The Black thickness in the top left is neutralized. | translate this |
| Still not good so good for Black. | translate this |
| And Black cannot make use of his upper-left thickness. | translate this |
| The Black thickness in the top left looks completely stupid. | translate this |
| White is still okay. | translate this |
| The ladder is bad for White. | translate this |
| White has no answer. | translate this |
| This is terrible for White. | translate this |
| Whatever Black plays now, White will control the important upper side. | translate this |
| This move is no good, even though White's follow-up is not immediately clear, White has sente and Black is awfully low on the left side. | translate this |
| Quoting the source: 'Two points sente'. | translate this |
| Quoting the source: 'Zero points sente'. | translate this |
| Loses points, and gote. | translate this |
| Concerning the marked stones, what is the best endgame play? | translate this |
| Subsequently, White can atari at A, and Black has to connect at B. White gains one point. | translate this |
| The marked stones get connected out. A and B are miai. | translate this |
| Subsequently, if White plays at A, Black answers at B. C is not sente either. White loses one point. | translate this |
| This exchange is not beneficial for White. | translate this |
| The two White stones are dead inside Black's territory. | translate this |
| White gains nothing. | translate this |
| Not unplayable but B is usually a better move. | translate this |
| If we suppose Black plays around S now, White can still aim at A and/or B or simply move out at D or E. | translate this |
| This move is a little too solid for the small knight's move. | translate this |
| Black to close the corner. What's the proper move? | translate this |
| White will almost certainly invade at A and you will end up with a rather small territory. | translate this |
| Black is a little too wide at the bottom. Yet if White is weak this move might be feasible. | translate this |
| Black needs another move to cover the hole at A so he will end in gote. | translate this |
| And Black can't cover all of his defects on the lower side with one move. | translate this |
| This move helps White get stronger and should therefore not be played. | translate this |
| Black to play. What's the proper move? | translate this |
| This solid move is often the best. | translate this |
| Experience shows that Black A would be a better move in most occasions. | translate this |
| And after Black plays the usual pincer around S, White has various moves (G,H,J,K for example) with which to annoy Black, as he is a little too thin. Simply playing at L or M or N is also an option though. | translate this |
| Black 1 is too loose. White jumps lightly away and can look forward to invading at A, settling himself with B or when he gets a stone in at Q invading at D or E. | translate this |
| Because of the weaknesses around A this solid move is most often the best. Black doesn't need to worry about the weakness at A as long as White doesn't get a stone in at K3. | translate this |
| This is too small. White can still move in at A or B if he likes. | translate this |
| This move is a little too loose. White can jump lightly to A or even invade at B. | translate this |
| If you have a stone around S this way of playing is reasonable. | translate this |
| Wrong. White can still invade at A. | translate this |
| Black is simply too weak at the bottom to try a move like this. | translate this |
| White to save his huge group on the right. | translate this |
| White can connect with A. | translate this |
| Too solid. (See commentary for a more detailed explanation.) | translate this |
| The marked exchange is bad for Black as it strengthens White. | translate this |
| How to prevent the connection? (Part 1.) | translate this |
| Black can now aim at A. | translate this |
| Since White is high on both sides Black has no reason to play this low. | translate this |
| This is not very good shape as White can aim at A and/or B. | translate this |
| Black doesn't mind White playing at A as this will weaken the marked stone. | translate this |
| This move is a little bit slow and also rather passive. | translate this |
| Black doesn't need to play this solid. | translate this |
| Because of the marked exchange, White is already alive in the top left. | translate this |
| Because White was already alive due to the squared stone, the marked exchange doesn't really help White here. | translate this |
| Too passive, too low. | translate this |
| Too slow as White is already alive in the top left. | translate this |
| Not effective as White is alive in the top left. | translate this |
| How to prevent the connection? (Part 4.) | translate this |
| Too slow. White can now look forward to attacking Black with A, B or C. | translate this |
| The wrong bump. The right group is stronger so Black should bump into that one instead. | translate this |
| This is also playable for both but Black seems to get the better of it. | translate this |
| Because of the marked exchange White needs to play another move here to prevent Black from cutting at G17. Black doesn't mind making White strong as White's position is over-concentrated. If you play C17 after K17, White may choose to answer differently. | translate this |
| Why waste this ko threat? | translate this |
| A little too placid. Black has a better way to prevent the connection. | translate this |
| The White corner is too big. Also White should have no problem rescuing his M16 stone. | translate this |
| Almost correct, but you should play something else first. As now White has the cut at A. | translate this |
| How to prevent the connection? (Part 6.) | translate this |
| White is connected. | translate this |
| White has been cut yet Black could have done this in a more fiendish way. | translate this |
| Next Black usually protects around A and White plays B. | translate this |
| Helps Black fix his shape. | translate this |
| Black dies first. However, if there are other stones on the board, this delicate sequence can change significantly. | translate this |
| What if Black tries to cut? | translate this |
| Black can't do this. White can push and cut. | translate this |
| Even though this move is commonly played, it is a mistake with no other stones on the board. Letting Black play here instead of A is bad for White. | translate this |
| This aji is important, but playing here immediately is premature. | translate this |
| White is pushing from behind, and in doing so helping Black fix an important weakness while making territory. | translate this |
| White still needs to protect the cut eventually, and so letting Black answer here is not optimal. | translate this |
| Black's weakness is gone. | translate this |
| Now, how's the best way to break out of this? You need a good move here. | translate this |
| Though this is sente against the two Black stones, there's an important difference between playing here and playing at A. With a White stone at A, White is alive in the corner in gote. In this bad shape, White needs another move. | translate this |
| This pushing from behind helps Black make territory while fixing an important weakness. | translate this |
| Now, how to protect the cut? | translate this |
| Letting Black get the 3-3 point is too bad. | translate this |
| Pushing from behind helps Black. | translate this |
| White is pushing from behind. | translate this |
| You decide to answer 3 with 4. How to continue? | translate this |
| From previous problem. After getting a stone at A, Black played 1 and 3. How can Black kill? | translate this |
| This doesn't help White. | translate this |
| From the previous problem. How to live after 1? | translate this |
| See previous problems. | translate this |
| See previous problem. | translate this |
| From the previous problem. How to kill? | translate this |
| There is no need to make extra sacrifices. | translate this |
| White is short of liberties. | translate this |
| White to live in the best possible way. | translate this |
| The two marked stones can't connect back. | translate this |
| The Black stones die. | translate this |
| Is there anything Black can do inside White's territory? | translate this |
| How to respond to Black 1? | translate this |
| This emphasizes the top, which is the interesting side. | translate this |
| The marked stones are low, so this side is not interesting. | translate this |
| Black wants to approach the top-right. Should he do it at A or B? | translate this |
| Although White captures four stones, Black gets very strong on the outside. Sealing Black in completely is much better. | translate this |
| Black can cut. | translate this |
| This weakness is not worth worrying about. | translate this |
| Eventually White can create a dead shape (rabbity six). | translate this |
| Black to live. Start on one of the marked points. | translate this |
| How can Black save these stones? | translate this |
| You could have killed the whole group. | translate this |
| White can live or connect to the outside. | translate this |
| Ko is not good enough. | translate this |
| White lives since A and B are miai. | translate this |
| White dies: double ko! | translate this |
| Now White fights a direct ko for life. You can do better. | translate this |
| If you search for a ko threat please play at A. | translate this |
| Please answer the White 'ko threat' at A. | translate this |
| White dies. Double ko. | translate this |
| If you search for a ko threat, play at A. | translate this |
| If you search for a 'ko threat' play at A. | translate this |
| Ko is not the answer. | translate this |
| Gote Seki for Black. | translate this |
| Black to capture the entire White group. | translate this |
| 1000-year-Ko, but not unconditionally alive. | translate this |
| Black could make a better ko. | translate this |
| Black could have made a better ko. | translate this |
| Ten-thousand year ko. | translate this |
| This move makes the right balance on the right. | translate this |
| Experience shows that A or B is better. | translate this |
| This move is not a pincer when White comes in at A, so it is slack. | translate this |
| The biggest move. | translate this |
| Too low. Also the upper side is not important. | translate this |
| Wrong point. If you want to play in this area A is the proper move. | translate this |
| The upper side is not important enough. | translate this |
| Personally I wouldn't say this is bad but Go Seigen seems to disagree, saying that A would be better. | translate this |
| The shimari (corner enclosure) is certainly big but Black 2 is even bigger. | translate this |
| Right move, wrong area. Black 2 is slightly bigger. | translate this |
| Too low. White A would be better. Yet White B would be even bigger. | translate this |
| Wrong point. White A is better when we consider just the local area. | translate this |
| An invasion at A would be preferable for White, as long as Black doesn't have a stone around the top hoshi (star-point). The idea being that, if Black takes away White's base on one side, White can either look forward to getting a stone in at C which is the weak spot of the Black corner, or having an easier base with D as it is 2 points away from the Black top. | translate this |
| Black can't cut at A. | translate this |
| White 1 is too slack. White is under attack. | translate this |
| Taking a liberty from the marked stones doesn't really help White, as Black can attack with A. | translate this |
| White is cut anyway. | translate this |
| White accomplishes nothing. | translate this |
| White accomplished nothing. | translate this |
| Black just played the marked stone. How to respond? | translate this |
| Now the capture race means something and Black will probably end up either winning, or with a strong settled group in the lower left. | translate this |
| White can still pull ahead in the capturing race by playing at A or B. | translate this |
| Playing the 3-3 invasion will get you sealed in, and the marked stone will be left stranded. It also does not take advantage of the ko threat that was played at A. You can do better. | translate this |
| White has foolishly ignored the marked ko threat in favor of saving her group up top. Make some noise, Black. | translate this |
| The invasion at A doesn't work without any stones nearby. | translate this |
| Can Black live locally or make a ko by playing at A? If you think not, please play at NO. | translate this |
| This prevents White from pushing Black into an over-concentrated position here. (See A) | translate this |
| The left side is open at the bottom and Black is flattened on the lower side. | translate this |
| The left side is open at the bottom, so it's not very interesting to play here. | translate this |
| Black's moyo strategy has collapsed. | translate this |
| White has to prevent Black from invading here. | translate this |
| White will have a tough time rescuing his three stones. | translate this |
| White has to settle himself but he can only do so by strengthening Black. The main point is that White didn't get a stone at A or B in the beginning, which would make it possible for him to take the 3-3 point. | translate this |
| White settles himself quite comfortably. | translate this |
| White need not defend in the center so this is an empty move. | translate this |
| Black is strong in the center. | translate this |
| Black has a better way to play. | translate this |
| White can start some difficult fighting. | translate this |
| Black is being attacked. | translate this |
| White will start a complicated fight at the top. | translate this |
| Black is in for a complicated fight. | translate this |
| It is not necessary to make this exchange. | translate this |
| Invading here is too early. | translate this |
| The marked Black stones are not yet settled. | translate this |
| This is bad, for it allows White to choose the side he would like to play. It is also an empty move, for it doesn't attack, defend or make territory. | translate this |
| Black has a better move. | translate this |
| White will invade at A and be happy with it. | translate this |
| White takes the initiative on the left. | translate this |
| The marked Black stone is in an awkward position. | translate this |
| White is doing well. | translate this |
| How to continue? | translate this |
| White capped too early. Black is fleeing in an uninteresting direction for White. | translate this |
| Black gets a lot of territory at the top and he also strengthens his left group. | translate this |
| Black has to defend at A to protect the corner, and this works inefficiently with the marked stone. | translate this |
| This works best with the marked stone, protecting the corner. | translate this |
| The top stones are extremely inefficient. On top of that, White can still slide at A, then when Black responds at B, White can make a solid base at C, nicely breaking up the right side and supplying backup for invasions. | translate this |
| White enters the corner; no good. | translate this |
| How should Black counter White's kakari with the marked stone? | translate this |
| After this, White will have no problem getting two eyes. | translate this |
| Black cannot win this. | translate this |
| This is not the way. After Black plays elsewhere and White responds... | translate this |
| After Black makes a ko threat and White responds... | translate this |
| Can Black save his group? If not, please play at A. | translate this |
| Black plays 1 instead of A. White to kill. | translate this |
| For an explanation, see next problem. | translate this |
| There is really no need to play here. White is unconditionally alive. | translate this |
| Does White require a move at A to ensure that his group is alive? Otherwise, please play at B. | translate this |
| Black can't play at A. | translate this |
| Ko: not the best result. | translate this |
| Almost, but I'm alive! | translate this |
| I have 2 eyes now! | translate this |
| And now? | translate this |
| Now, make the right choice! | translate this |
| I have 4 liberties now, and you have only 3, so you must be wrong. | translate this |
| No matter what White does, he is captured. | translate this |
| White wants to take marked stones. Help him! | translate this |
| That's it! | translate this |
| This is the wrong approach. | translate this |
| Again White resists. | translate this |
| White profits from the wrong order of moves. | translate this |
| Lives. | translate this |
| White! | translate this |
| If you think this is not correct, contact me. | translate this |
| Black to play and sweep White off the board. A hint: the order of moves is important here. White should be driven to the edge. | translate this |
| Too merciful. | translate this |
| I think this problem has something to do with the old Chinese concept of 'fullness' and 'emptiness' of a group. | translate this |
| Patience is required here. | translate this |
| Looks like White is free from his biggest weakness. | translate this |
| Can Black take the White group off the board? If not, play A. | translate this |
| Dead by double ko. | translate this |
| White can also get seki if ko is not an option. | translate this |
| Black dies by shortage of liberties. | translate this |
| Black is superior now. | translate this |
| Black does well. | translate this |
| Insufficient. | translate this |
| White is toast. | translate this |
| White is safe. | translate this |
| Black is left weak outside and life is gote. | translate this |
| What can Black do in this position? | translate this |
| Black kills White. | translate this |
| White catches it. | translate this |
| What can Black gain here? | translate this |
| Black can capture, but must fill his second eye... | translate this |
| Not a ko! | translate this |
| Black will choose a better variation in a real game. | translate this |
| White to save her stones, no ko (not that she should in a real game). | translate this |
| Can Black do anything against the corner? Play at A if not. | translate this |
| Black to kill. Play at A if you think it's unconditionally alive. | translate this |
| Seki (if Black plays another move). | translate this |
| Gote seki, not best. | translate this |
| 2-step ko. | translate this |
| White to save the marked stones in the best way. Ko is to be avoided. | translate this |
| Gives seki at best. | translate this |
| Black should avoid playing aji keshi. | translate this |
| Seki in the best variation. | translate this |
| Black is forced to approach from the left side to defend his lone stone on the bottom, White can expand up the right side, countering a possible extension from Black's shimari in the upper right. | translate this |
| Close, but no: this leaves White open at the bottom when Black extends, and another move would be inefficient. | translate this |
| Black is all too happy to extend in this direction before making an approach from the side of his shimari. | translate this |
| Black is all to happy to extend in this direction before making an approach from the direction of his shimari. In addition, White is still open at the bottom in the direction of Black's stones on the lower side. | translate this |
| Black is all too happy to extend here before making an approach from the top supported by his upper-right shimari. | translate this |
| Black is all too happy to extend in this direction before making an approach from the top supported by his upper-right shimari. | translate this |
| Wrong direction. Black can make an approach at a followed by an extension at B, weakening White's lower left shimari and giving Black a strong foundation on the lower side. | translate this |
| Wrong direction, Black can still make an approach at A, followed by an extension at B, weakening White's lower left shimari, and giving him a strong foundation on the lower side. | translate this |
| Wrong direction, Black can still make an approach at A, then an extension at B weakening White's lower left shimari and giving him a strong foundation on the lower side. | translate this |
| Wrong direction. Although it splits the marked stone from the moyo on top, Black can still make an approach at A, and after White responds, Black can extend to B, threatening White's lower left shimari. Black is left with a solid foundation on the bottom, splitting White, leaving the right side without a substantial moyo. | translate this |
| This corner is more or less settled for now. There are way too many big points left to be playing around here. | translate this |
| Right idea, too narrow. | translate this |
| Black has a moyo on the upper side, and will now want to approach White's 3-3 stone. What is White's best move? | translate this |
| No, no, no! | translate this |
| Wrong approach. White builds a nakade inside. | translate this |
| Slack! | translate this |
| This is a ko. | translate this |
| Black is dead. (Bent four in the corner.) | translate this |
| A and B are now miai. | translate this |
| White has given up too much when Black plays A. | translate this |
| Black is unconditionally alive. | translate this |
| Black has had another chance to repair his defect. | translate this |
| After the previous problem, Black has played at 1 rather than protecting his corner. How can White punish him? | translate this |
| Black has only one eye in the corner, and none at the edge. | translate this |
| Now the problem is for Black to kill the White group on the right. | translate this |
| If you think the left Black group needs another stone to live play at A. If you think the left Black group is already alive play at B. | translate this |
| White has played the marked stone. How to protect against the cut? | translate this |
| White has played a hane and connection. What to do? | translate this |
| Black is caught. | translate this |
| Black can't do this. | translate this |
| Black played 1, trying to get out. Stop him. | translate this |
| Good extension from the corner, working on the moyo above, and stopping White from making a good extension into the corner. | translate this |
| Not good for Black. | translate this |
| Too early to come in like this. | translate this |
| This area is uninteresting. | translate this |
| Too slow and small a move for this stage of the fuseki. | translate this |
| Not sente, and White will not try to cut here at this stage. | translate this |
| Too slow. Lets White approach the upper-left corner. | translate this |
| White has one more liberty than Black. | translate this |
| Black dies in the corner. | translate this |
| Black achieves nothing. | translate this |
| Black to save the marked stone. | translate this |
| White cannot approach the Black stones. | translate this |
| This is not more than a gote seki. | translate this |
| What can Black achieve? | translate this |
| Black lives but White can play 2 moves in a row around her ko threat. | translate this |
| Ignoring your ko threat, White kills your group. You could have lived unconditionally. | translate this |
| You got it. Ko is not necessary. | translate this |
| Please answer the White ko threat at A. | translate this |
| Eventually Black has to connect at A and is then left with a dead shape inside. | translate this |
| Eventually Black has to connect at A and is left with a dead shape inside. | translate this |
| Oh, no! | translate this |
| White loses. | translate this |
| Black escapes. | translate this |
| White is split into two. | translate this |
| Black can escape. | translate this |
| Black's pivotal stones escape. | translate this |
| White to connect her stones. | translate this |
| Black can now choose A to settle himself or B to fight. | translate this |
| Black can't win the capturing race in the corner. | translate this |
| A slightly unusual move, but not less powerful, since how should Black live in the corner? A is also joseki. | translate this |
| And Black can run away with the marked stones. | translate this |
| White is happy. | translate this |
| White has some big potential on the lower side. | translate this |
| White can look forward to attacking Black on the lower side with a pincer around A. | translate this |
| If the marked Black stone would have been at A this would have been playable, but now it is too near the White thickness. | translate this |
| White A is not possible with the one space high pincer (B). This result is inferior for White. | translate this |
| Black A creates unnecessary complications. | translate this |
| Bad. White can keep on pushing at A, making Black B completely ineffective. | translate this |
| Black has a better way of playing. | translate this |
| Six (similar?) joseki, Part 2. | translate this |
| This leaves A and B for White to aim at. | translate this |
| Black A would probably be a little bit better but the difference is not that great. | translate this |
| Which connection is the right one? | translate this |
| This result is not very interesting for Black. | translate this |
| And White doesn't have a proper ko threat. | translate this |
| Black is doing nicely. | translate this |
| This is very bad style. | translate this |
| White has no proper ko threat. | translate this |
| White is destroyed and might just as well resign immediately. | translate this |
| Black is in big trouble here. | translate this |
| This is slack. | translate this |
| There's no need for taking sente here. | translate this |
| This move is too slow. A is the proper move. | translate this |
| This is very bad for White as he can only get proper shape by strengthening Black even more. | translate this |
| White is in for a tough and unnecessary fight. | translate this |
| A good light move. | translate this |
| Black has some bad aji around A. | translate this |
| The marked exchange is a good one for White, as it prevents Black from jumping to the center. | translate this |
| Please choose one. | translate this |
| Black is under attack. | translate this |
| Black is a little thin. A would have been a thicker move. | translate this |
| Black is in big trouble as he has no decent follow-up. | translate this |
| Black A is too small. It would have been better to jump towards the center instead. | translate this |
| White is doing nicely. | translate this |
| Black is hampered by the big hole between the marked stones. | translate this |
| This is the right joseki for Black. | translate this |
| White will be in trouble. | translate this |
| White has lost the fight. | translate this |
| White is probably not very happy with this result. | translate this |
| White can resign. | translate this |
| Not totally unplayable, but Black can certainly do better than this. Please note that Black is handicapped by the weaknesses around A. | translate this |
| White will be able to settle himself with this move, so this result is not very interesting for Black. | translate this |
| There's no reason for Black to play like this. | translate this |
| This result is generally slightly better for White. | translate this |
| You fell for the so called 19-point trick play. This result is very favorable for Black because of his incredible thickness and sente; besides, White only has 19 point of territory. | translate this |
| White is in big trouble. | translate this |
| White can now make a pincer on the lower side. A White position in the lower left is necessary when playing this way. | translate this |
| Black played A in response to White's marked move. How to continue with White? | translate this |
| Now if Black plays at A White will be alive in seki. | translate this |
| If you think the left White group is alive play at A, and if you think the left White group can be killed go ahead. | translate this |
| Black has only one real eye. | translate this |
| Black only has one real eye. | translate this |
| White has forcing moves at A and B, while Black must worry about White C. Therefore the marked stone is far from dead. | translate this |
| A hole remains at A. | translate this |
| Now Black can play at A and the marked stone is almost dead. | translate this |
| Black does not get as much as he could. | translate this |
| How to respond to White's move at 1? | translate this |
| White only gets one gote eye on the bottom. | translate this |
| Ko: not best. | translate this |
| How to attack White's dragon? | translate this |
| This is the most consistent move for Black, frequently played by Takemiya. It works well with all the high stones and takes the initiative by setting up a moyo so huge that White has no choice but to try to reduce it while White's own moyo is reduced from above. | translate this |
| White has taken the initiative in the center. | translate this |
| White will gain the initiative by attacking Black. | translate this |
| Whatever happens here, White will be only too happy with it as these moves are inconsistent with the Black moyo-building strategy on the right. | translate this |
| Play at one of the marked points. Which move is strategically most consistent, and indeed most common in professional games in this position? | translate this |
| Black is stuck. | translate this |
| Whoops! | translate this |
| The usual moves work here. | translate this |
| This move prevents both ladders. White will probably answer at A. | translate this |
| Good for White. There's a lot of aji around A. | translate this |
| Black to save himself. | translate this |
| Best endgame? | translate this |
| Black to save the five surrounded stones. | translate this |
| This is not optimal. | translate this |
| Black to save the marked stones in the best way. | translate this |
| A ko is not good enough for Black. | translate this |
| Point A is always worth 5 points. It's also a 20 point ko threat. Please, in a symmetrical situation, play on the right. | translate this |
| Ko is the best Black can do. | translate this |
| Direct ko, White takes first. | translate this |
| White won't play like this. | translate this |
| Direct ko, White takes first. White can use P19 as an internal threat (Black will answer at A) but will lose more by it if Black wins the ko anyway. Black cannot use A for a threat; White would live in the corner. | translate this |
| Direct ko, White takes first. White can use P19 as an internal threat (Black will answer at A) but will lose more by it if Black wins the ko anyway. | translate this |
| Right idea, wrong timing. | translate this |
| Black to try something. | translate this |
| Normally this is unreasonable, but as Black has the 2 marked stones in place, he can fight like this. | translate this |
| Sooner or later Black will have to add a move in the corner. | translate this |
| About equal, but because White has prevented Black from playing the Chinese fuseki, this can be considered a small succes for him. | translate this |
| White can be satisfied. | translate this |
| Unclear. | translate this |
| White has a serious shape problem as he cannot defend against the A-B combination. | translate this |
| The marked exchange is very bad for Black. | translate this |
| 3 is not an appropriate move in this situation. How to continue with Black? | translate this |
| White cannot cut. The White group on the side dies. | translate this |
| Black to kill the marked White stones. | translate this |
| White makes a ko. | translate this |
| How can White best attack the Black group? | translate this |
| White cannot approach anywhere here. | translate this |
| How can Black win? | translate this |
| Ko, and White takes first. | translate this |
| White is lost. | translate this |
| This is not the best ko, as Black took first. | translate this |
| What is White's best move in the corner? | translate this |
| Big but not urgent. | translate this |
| This hurts Black's shape and makes eye space. | translate this |
| Black fixes. | translate this |
| Doesn't take advantage of Black. | translate this |
| Not sente. | translate this |
| Too early to run like this. | translate this |
| Black plays 1. Best move for White? | translate this |
| Unnecessary. | translate this |
| Black to play and save his 2 surrounded stones with an easy ko. | translate this |
| Black has bad shape. | translate this |
| This is often a tesuji, but here it does not work... | translate this |
| Black can escape only with bad shape. | translate this |
| Ko. Outside blocked off. | translate this |
| Even though ko is the answer, this result is inferior, as you haven't blocked at G1. | translate this |
| This ko is inferior, as White hasn't blocked at G1. | translate this |
| This just helps Black. | translate this |
| You capture four stones, but the rest of the group is alive. | translate this |
| White is dead! | translate this |
| Black to kill the whole group. | translate this |
| Black 1, sacrificing a stone, is important. | translate this |
| Black plays to rescue Black's five stones. | translate this |
| White kills the Black stones. | translate this |
| Black has only one eye left. | translate this |
| Black to play and live. (The Black stone in Atari is helpful in this problem.) | translate this |
| Black 1 is the vital point. Black can rescue his two stones and capture White's stones. | translate this |
| If Black 1, White occupies the vital point 2 and Black cannot save his stones. | translate this |
| Black loses the four marked stones. | translate this |
| Black to play to capture White's six stones. | translate this |
| Trouble. | translate this |
| Fighting the ko is the best White can do. | translate this |
| Black wins the semeai. | translate this |
| The O5 stone escapes and later White can make the 'rabbity six' shape to kill Black. | translate this |
| White O3 makes the eyes at N4 and P4 false. It cannot be caught. | translate this |
| Black O4 is a mistake. | translate this |
| White to play. | translate this |
| Black to link up all his stones. | translate this |
| Black can do better than a ko. | translate this |
| Kill the White stones unconditionally. | translate this |
| Black 1 is the vital point to get two eyes. | translate this |
| Black now has the option to make two eyes by playing D19 or A18. | translate this |
| If Black 1, then White 2 gets a ko. | translate this |
| Black to play and live. (Don't let White get a ko.) | translate this |
| If Black 1, then White 2 results in a ko. | translate this |
| Black to live (be careful not to get a ko). | translate this |
| Black 1 is the vital point, and Black lives. | translate this |
| White 2 is the vital point. Black is dead due to the shortage of liberties. | translate this |
| Black 1 is the vital point. White cannot make two eyes due to the shortage of liberties. | translate this |
| Black plays, White dies. (Black's first move is vital.) | translate this |
| This is often the vital point, but here it fails. | translate this |
| Black to kill White. | translate this |
| Black suffers from a lack of liberties. | translate this |
| Black to save his three stones in the corner. | translate this |
| Maybe seki. | translate this |
| White to kill first. | translate this |
| B13 is the vital point. Black gets a ko. | translate this |
| Black has no space to get two eyes. | translate this |
| Black cannot win the capturing race. | translate this |
| Black to play. Can Black rescue the three stones in the corner? | translate this |
| B13 is the vital point. After White C13, Black B12 destroys White's eye shape. | translate this |
| White gets a ko. | translate this |
| Black plays, White dies. (Be careful of ko.) | translate this |
| You can do better. | translate this |
| White has better. | translate this |
| Black starts wishing for threats. | translate this |
| Woo hoo. | translate this |
| White to play and catch as many stones as he can. Assume Black has fewer ko threats. | translate this |
| Ko for the life of the lower stones. | translate this |
| Ouch! All gone. | translate this |
| Oops! | translate this |
| Black loses the lower stones. | translate this |
| Bye bye stones. | translate this |
| The lower stones are dead. | translate this |
| Following on from the previous problem, White has just played the marked stone A at T5. This time Black has plenty of large ko threats. How to defend? | translate this |
| Black can still be made to fill in. | translate this |
| Black must fill in. | translate this |
| Black must fill. | translate this |
| Black connects. | translate this |
| Black wins since White also filled in. | translate this |
| Black accepts the gift. | translate this |
| Both players have filled in, Black wins. | translate this |
| Black wins as both players have filled in a point. | translate this |
| Both fill in, Black wins. | translate this |
| Both have filled in, Black wins. | translate this |
| White to play. If you think the game is finished play at A, (T19). Otherwise try to find an extra point. | translate this |
| Snapback: Black can't capture without being caught. | translate this |
| Attacking this side means suicide. | translate this |
| When White turns at 1, Black tries to weasel out of it at 2. What should White do? | translate this |
| Black only gets part of the corner. | translate this |
| White survives. | translate this |
| Black gets part of the corner. | translate this |
| Black only takes part of the corner. | translate this |
| How should White play? | translate this |
| The big Black group is captured. | translate this |
| White has a small advantage at this point. | translate this |
| This is possible. | translate this |
| Now what? | translate this |
| Black just took at 1. White needs a good ko threat. | translate this |
| One eye beats no eye here, White dies. | translate this |
| Not necessary. Now seki here. | translate this |
| Easy Black win? | translate this |
| Easy one :-) | translate this |
| Ko is the correct answer. | translate this |
| A becomes a false eye. | translate this |
| White to save the lonely stone. | translate this |
| A living group with false eyes. | translate this |
| White gets a bad ko (Black has taken first). | translate this |
| White gets an eye in the corner and at B17 or C17. | translate this |
| Black's lower group escapes. | translate this |
| Black escapes, White is dead. | translate this |
| Only space for one eye, and Black's lower group can escape. | translate this |
| White to play and live without ko. | translate this |
| Black can play ko like this. | translate this |
| How can White win this? | translate this |
| Smartass! | translate this |
| Don't use a ladder if you can capture without one. | translate this |
| Black cannot keep White inside. | translate this |
| Black to capture the two marked stones splitting his group. | translate this |
| The marked stones show a strong shape Black should strive for. In a real game White would attempt to move at K10 (known as the eye-stealing tesuji) instead of J9. Of course this means Black should beat him to the punch by playing there first. On further study, it is not necessary to capture the White stone if both Black groups are connected, as this is a small 2 point move. | translate this |
| The ladder does not work. | translate this |
| M12 was a ladder-breaker. | translate this |
| M12 was a ladder breaker. | translate this |
| A ladder. | translate this |
| Black to capture the marked stone. | translate this |
| Only one eye here. | translate this |
| Black has A, B or C for his second eye. | translate this |
| White has attacked with A and C while Black blocked at B. Black to play and live with two eyes. | translate this |
| Big for territory but there is a more urgent move. | translate this |
| Looks good but there's a very urgent move around and J5 is still open. | translate this |
| Connects the large Black group to live stones. | translate this |
| Takes territory but the corner is still open since Black needs to protect against a connection to the R13 group. | translate this |
| Big for territory but a more urgent move is around and J5 is still open. | translate this |
| Black to play. Best move? | translate this |
| Please see main variation. | translate this |
| Easy one. White to move. | translate this |
| A and B are miai. Only one eye. | translate this |
| Black sacrifices the stones on the left but is alive. | translate this |
| White choses to follow A with C at J16 this time. Black to live unconditionally with two eyes again. | translate this |
| A White play here would start a ko for this entire group and both White and Black have a local ko threat (T6/S5 for Black and L1 for White). | translate this |
| This takes some territory but Black has a group in danger. C18 would be better since White can't cut at D18 due to aji of D17 followed by C16. | translate this |
| Gote, so White can erase gains at C6. | translate this |
| White can connect at A9 and needn't worry about cutting points above yet. | translate this |
| Takes territory, but Black has a group in danger. Note: White can't cut at D18. | translate this |
| Sente due to weakness at L1 (otherwise Black has J1 then L1) but there is a larger move. | translate this |
| Stops White reducing with F11, but there is a more urgent move for Black. | translate this |
| A couple points in gote. | translate this |
| Sente due to weakness at G1 (otherwise Black has J1 then G1) but there is a more urgent move. | translate this |
| Black gets only a few stones; the main part of White's group lives. | translate this |
| If Black 1, White's moves 2 to 6 get a ko. | translate this |
| Save the three Black stones by capturing the White stones outside. | translate this |
| Black 1 is the vital point of this shape. After White 2, Black 3 destroys White's eye shape taking advantage of its shortage of liberties. If White 2 at 3, Black 2. White is dead. | translate this |
| Black 1 is wrong. White is alive with 2 and 4. | translate this |
| Black plays, White dies. (The first move is the vital point.) | translate this |
| Black 1 enlarges its territory. Black now has enough space to make two eyes. | translate this |
| There is now no space for Black to get two eyes. | translate this |
| Black cannot make 2 eyes in the corner. | translate this |
| Black to play and live. (The first move is important.) | translate this |
| The hane of Black 1 is the vital point. | translate this |
| White is in damezumari. | translate this |
| When White goes out like this, there's no telling what will happen next. | translate this |
| Seki, so White lives. | translate this |
| Seki is the best Black can get now. | translate this |
| Black's hane gives White no space to get two eyes. | translate this |
| Bent four in the corner. | translate this |
| Ko at best. | translate this |
| Black plays, White dies. | translate this |
| Black 1 is important to get two eyes. Black is alive. | translate this |
| After 3, White has no space to get two eyes. | translate this |
| If Black plays 1, White can live with 2 and 4. | translate this |
| Black plays, White dies. (Take advantage of White's shortage of liberties.) | translate this |
| White cannot win the race. | translate this |
| False eye at A. | translate this |
| Marked stones in atari. Black dies. | translate this |
| Black to play and live. (Black has to capture the two White stones to live.) | translate this |
| Black has destroyed White's eye shape. | translate this |
| White gets two eyes. | translate this |
| The captured stone A gives White a second eye. | translate this |
| White can play A or B and live. | translate this |
| Black to play. (Black can destroy White's eye shape by sacrificing stones.) | translate this |
| Black 1 is the key move. | translate this |
| Black cannot make two eyes. | translate this |
| Black 1 is the vital point of the eye shape. Black is alive. | translate this |
| Black dies a horrible death. | translate this |
| White gets a ko. If White plays C3 Black gets another ko at A3. If White plays A3 Black B1 makes a dead shape. | translate this |
| White gets a ko. If White plays D1 Black gets another ko at A3. If White A3, Black makes a dead shape with B1. | translate this |
| Black has played A. White to play and live any way he can. | translate this |
| Testing move. If White answers at A, Black can later live in the corner. If White answers at B or C, Black cuts starting with D. | translate this |
| White's corner is huge and the marked stone is bad. | translate this |
| Black needs another move here, and will have bad shape while giving White a large corner. | translate this |
| Slow and gote. | translate this |
| Hard to live in the corner after the first exchange. | translate this |
| Helps White. | translate this |
| How should Black answer White 1? | translate this |
| No seki since Black will need to connect at S13 at some point. | translate this |
| Only one eye. | translate this |
| Nice. | translate this |
| Good work. | translate this |
| White will have to play S13 and S15 so there is no seki. | translate this |
| Dead eventually. | translate this |
| A and B are miai for Black to avoid seki since White must play S15 at some point. | translate this |
| Black attacks at A. How to live unconditionally? | translate this |
| White is caught. | translate this |
| Black to play and capture the marked stones. | translate this |
| Nice trick. White can't play A due to shortage of liberties. | translate this |
| Black to play and kill. | translate this |
| Black 1 is the vital point. After White 2, Black 3 gets two eyes. | translate this |
| Black cannot make 2 eyes. The marked point is a false eye. | translate this |
| Black can't make any eyes at all. | translate this |
| Black 1 fails to get two eyes, allowing White to occupy the vital point B13. | translate this |
| The eye at A is false, because B is in Atari. | translate this |
| White's marked stones make a 'killing shape' -- Black cannot make two eyes. | translate this |
| Ko is not best. | translate this |
| This is not the best, because Black took those stones in sente. | translate this |
| Black played 1 to take away an eye. How to respond? | translate this |
| The marked stones are caught in a shortange of liberties. | translate this |
| The atari at K1 changes the hane at M1 from 1 point gote to 2 points sente since Black needs another move (assuming there aren't bigger moves elsewhere). | translate this |
| L2 over-complicates things but still means M1 is 2 points in sente instead of the 1 point in gote (assuming there aren't bigger moves elsewhere). | translate this |
| 1 point gote. | translate this |
| Only A1 is a real eye. | translate this |
| D1 is a false eye; the corner will not be more than one eye either. | translate this |
| White should win from this position (many variations) but Black can get a ko or seki if he slips. | translate this |
| White's best is now a ko due to Black's large eyespace. | translate this |
| White loses the race. | translate this |
| Black has cut at A. White to play and kill the marked stones without ko. | translate this |
| At this point White resigned. | translate this |
| Loses a liberty. | translate this |
| How to save the marked stones? Ladders work for either side. | translate this |
| Next White can aim at A. | translate this |
| Black gets a nice position on the left. | translate this |
| White might come under attack. | translate this |
| White's push at A only generates potential ko threats. | translate this |
| Black has given up too much. | translate this |
| White is happy with a ko. | translate this |
| White is happy with ko and an internal ko threat. | translate this |
| Black lives in the corner, but has given up too much by letting White in. | translate this |
| White is ahead in liberties and takes the corner. | translate this |
| The four Black stones cannot escape; Black has given up too much. | translate this |
| White pushed with A, Black played elsewhere, and White cut with B. What can Black do? | translate this |
| This seems to work, but the jump is not the cleanest approach. | translate this |
| What to do about the marked stones? | translate this |
| Black to capture the seven White stones. | translate this |
| This gives Black extra ko threats. | translate this |
| How to respond to Black 1? Try to maximize points in the corner. | translate this |
| Looks impenetrable (to me at least) but there's aji... | translate this |
| White ates at 1. How to save the Black stones? | translate this |
| Bad shape, but stops L8 being sente against these cutting stones. This means Black can't now cut with the N5 stone without strengthening White first at L6 and Black doesn't have enough forcing moves to create a second eye here. | translate this |
| Safe option. | translate this |
| Makes the possible eye at N15 false. | translate this |
| Other moves also also kill but this is the more solid approach. | translate this |
| L15 is possible but leads to a longer fight since Black is later able to push at P15 in sente and cut using the stone at N5 to isolate the right side. | translate this |
| White needs to stop a possible move at P12 being effective, which would threaten to link up to the outside while protecting a possible eye at N13. Moves around P12 would also work. | translate this |
| Extracts cutting stone and threatens M8. K9 wouldn't work. | translate this |
| Protects cutting point and tries to develop eye-shape. | translate this |
| This reduces Black's center group to one eye as long as M11 remains a false eye. You can use the navigate solution option starting at A19 to see one continuation. | translate this |
| Biggest or most urgent point for White? | translate this |
| One liberty short. | translate this |
| White can't approach the Black group at A. | translate this |
| Black loses the capturing race. | translate this |
| Black to win the capturing race. | translate this |
| White has one eye and Black has none. Black dies. | translate this |
| White just played the marked stone. How should Black respond? | translate this |
| White makes a living group inside Black's territory. | translate this |
| Black surrounds all his territory and can aim at A. | translate this |
| White only incurred a loss. | translate this |
| White to break into Black's huge moyo. | translate this |
| Invalidating Black 1 -- he muttered 'kosumi!' | translate this |
| The stones on top die. | translate this |
| This. | translate this |
| Please throw in at A. | translate this |
| This helps Black's position. | translate this |
| How to respond to 1? Hint: around this area. | translate this |
| Black escapes, and the marked stones die. | translate this |
| White to kill the four Black stones. | translate this |
| Capture the marked stones. | translate this |
| Seki, but you can do better. | translate this |
| A mistake by White. Reverts to correct answer. | translate this |
| Two stones is not enough. | translate this |
| Seki. You can do better. | translate this |
| Wishful thinking. White won't play this way. | translate this |
| White A, rather than White B, would have been preferable. | translate this |
| Two-step ko. | translate this |
| Dead as it stands. | translate this |
| Can White do better than seki? | translate this |
| To kill, White has to win two ko's in a row. | translate this |
| 1000 year ko. | translate this |
| Ko. Black should try to exchange Black A for White B to avoid this ko. | translate this |
| Black has a desperate ko. | translate this |
| This ko will usually be worse than We19, Bd19, Wb19, because Black ends the ko by capturing at A. | translate this |
| This returns to the 'official' variation with A and B switched. | translate this |
| This move was suggested by Daniel. I can't find a refutation, so I added the variation. | translate this |
| Exchanging White A for Black B before White C would be better aji. | translate this |
| 1000 year Ko (in this case a direct ko, but first Black can tenuki). | translate this |
| Also a 1000 year Ko, but with one extra approach move. | translate this |
| If I were a carpenter (1). | translate this |
| Wrong defense. | translate this |
| Next White A or B for Black C: a two-stage Ko in Black's favor. | translate this |
| If I were a carpenter... (2) | translate this |
| If I were a carpenter... (3) | translate this |
| Seki at best. | translate this |
| If I were a carpenter... (4) | translate this |
| If I were a carpenter... (5) | translate this |
| If I were a carpenter... (6) | translate this |
| You made it. | translate this |
| If I were a carpenter... (7) | translate this |
| Dead. (Black can't play A.) | translate this |
| If I were a carpenter... (8) | translate this |
| Distant 1000 year Ko. | translate this |
| Black will get A for an eye. | translate this |
| If I were a carpenter... (9) | translate this |
| Ko. Black can't play A. | translate this |
| White needs another move just to achieve double-ko. | translate this |
| If I were a carpenter... (10) | translate this |
| Wrong defence. | translate this |
| If I were a carpenter... (11) | translate this |
| 1000 year ko. The throw-in at A is actually not so good, because without it White can trade B for C. In my faulty first version this was the only solution, so I'm leaving it correct. | translate this |
| If I were a carpenter... (12) | translate this |
| Sente seki. | translate this |
| Gote seki. | translate this |
| If I were a carpenter... (13) Can't do much here. | translate this |
| Black has won the corner. | translate this |
| Seki after White A. | translate this |
| Nope. Actually it's not the move itself that is wrong, but the intention of playing ko is wrong. Even if you see that your group is now alive, you've given White an extra ko threat at A which Black has to answer at B. | translate this |
| Play A if you think it's ko. | translate this |
| This move is not really wrong, but I decided to penalize the intention of playing ko. | translate this |
| Dead. (This is the L-shape. Make sure you understand why it's dead.) | translate this |
| Dead. (A and B are miai.) | translate this |
| Dead as it stands. (A and B are miai.) | translate this |
| If Black plays B, White A makes it a bent four. | translate this |
| White salvages some stones and takes sente. | translate this |
| White saves some stones but in gote. | translate this |
| Ko for everything. Black has two local threats, but this could be White's best option. | translate this |
| How should White deal with Black's move at A? | translate this |
| Bingo. | translate this |
| Yup. | translate this |
| Now Black will get A or B. | translate this |
| Too bad the triangled stone isn't placed at A... | translate this |
| Alive in seki. Black has 1 point for the captured stone. | translate this |
| Black will not play like this as Black misses getting a point for a captured stone. | translate this |
| Ko. (A one approach move 1000 year ko.) | translate this |
| Direct ko. | translate this |
| Don't let anything fishy happen... Black can win any ko. | translate this |
| Dead as a doornail. (A and B are miai.) | translate this |
| Still dead. | translate this |
| Black will get A or B. | translate this |
| Time to make an enemy for life... | translate this |
| How keen of you to play A! | translate this |
| Close only counts in horseshoes. | translate this |
| Dead end. | translate this |
| White can do nothing. | translate this |
| Black is already salivating. Teach him some manners. | translate this |
| Congrats. | translate this |
| Good White move at A, but overall, an unnecessary loss of two stones. | translate this |
| Watch your step. | translate this |
| Got it! | translate this |
| Looks like a 4 step ko to me. (Only 3 liberties in the corner.) | translate this |
| Looks very promising. But how to skin this rabbit? | translate this |
| Believe it or not. Actually, the variations are very straightforward from here. Black can capture the two stones, but it doesn't help him. The reason I didn't add any variations is that there are so many useless Black move combinations from here. I think the Japanese call this striking tesuji 'patting the raccoon's belly'. | translate this |
| Now Black has time to capture. | translate this |
| Smart move at A, but only ko. | translate this |
| Ticklish. | translate this |
| White has turned the corner into ko, but Black has already profited from the A - B exchange. In any case, the attack on Black, that White was hoping for, will not materialize. White's original clamping move at C has to be termed 'handicap style'. | translate this |
| Illegal. | translate this |
| Please do not play A. In a real game A is a good move, as it gains a threat. | translate this |
| The hane at A gives White life, and Black is in trouble. | translate this |
| White should be taking Black. | translate this |
| Now a ko is not optimal. | translate this |
| Good moves at A and B. | translate this |
| This reverts back to the correct ko solution. Both sides have made a mistake. | translate this |
| White mistake. | translate this |
| Now White is dead. | translate this |
| Because of the A - B exchange, after Black plays C, White can live with D, E, F, G, H. | translate this |
| This lets White live unconditionally. | translate this |
| Too easygoing. | translate this |
| The free move at A will let White live easily. | translate this |
| Black to live. The first move is the most important. | translate this |
| Still ko. | translate this |
| Ko. There are even better ko's to be had than this. | translate this |
| Alive and kicking. | translate this |
| Is it time to play elsewhere yet? T for tenuki. | translate this |
| Can Black play tenuki now? If yes, play T. | translate this |
| Please see variations. | translate this |
| Reduces to one eye. | translate this |
| Naaah. | translate this |
| D'oh! | translate this |
| D'oh! Wrong. | translate this |
| White's living la vida loca. | translate this |
| Bad dog. | translate this |
| Naah. | translate this |
| Hmm... | translate this |
| No way you're gonna get that dead. | translate this |
| White is alive and kicking. | translate this |
| What in the hell are you doing? | translate this |
| What in the heck are you doing? | translate this |
| White has no problems getting two eyes. | translate this |
| Black to play; lots of ways to mess up... | translate this |
| There is a better way. This is one point worse than the correct answer. | translate this |
| Black to save the 5 stones by connecting to the outside 2. | translate this |
| Now Black needs to play two more moves inside at A and B. | translate this |
| Black still lives, but loses points. | translate this |
| Black only needs to play one more move inside at A. | translate this |
| Five points for Black. The same as the correct solution. But Black can exchange A for B, making this 2/3 of a point worse for White. (A ko with no further implications is worth 1/3 of a point, because one side needs 1 move to connect, and the other side needs 2 moves to capture and connect, making it 1 point for 3 moves.) | translate this |
| Warning: this is an endgame problem. The Black stones are completely safe. | translate this |
| Because of A for B, White will eventually have to add a stone inside. White's territory is 6 points. | translate this |
| This loses a ko threat. | translate this |
| This loses a point. | translate this |
| Only 4 points for White, but gote for Black. | translate this |
| White captures at A. | translate this |
| You did not gain anything. White can play A for 7 points as before. | translate this |
| Gote for Black, 6 points for White. | translate this |
| 7 points for White. | translate this |
| Warning: this is an endgame problem. Consider the value of sente to be larger then 2 points. When you want to take sente, play A. (Not just now.) | translate this |
| Now A will be gote. | translate this |
| Now Black A will be gote. | translate this |
| Now Black B will be gote. | translate this |
| Your assignment is to play both A and B in sente. (There is actually more than one possible timing, but only the natural solution path, where you leave nothing in atari yourself, is marked as correct.) | translate this |
| White has to answer every move. | translate this |
| The move at Black A was unnecessary, but this works too. | translate this |
| Big trouble for White. | translate this |
| White doesn't have to answer A. | translate this |
| Black A will be gote. | translate this |
| Yet another noble 1-pointer. Your assignment is to play A in the most profitable way. (Disregard the center.) | translate this |
| Lo and behold! If Black is stubborn, we get a ko for everything. (Black cannot defend both A and B.) | translate this |
| A nice grab in sente. | translate this |
| The best Black can do now. | translate this |
| Gote, but nice and fat. | translate this |
| Black's best play. | translate this |
| Good, but not perfect. White could have gained two more points. | translate this |
| Best play. | translate this |
| Two-step ko. Not bad. | translate this |
| Two-step ko. Even better. | translate this |
| Actually, the best White can do. | translate this |
| Good going. | translate this |
| You qualify as a good shepherd. | translate this |
| Keep your herd together! | translate this |
| Seki in the corner is superior to losing the marked stones. | translate this |
| White lives, but at quite a price. | translate this |
| White lives, but at quite a price, plus now it's gote. | translate this |
| There's no need to fill your opponent's beggar's bowl with White stones. | translate this |
| The corner is now safe and the marked stone is in a useful position. | translate this |
| Now Black lives with territory. | translate this |
| Please hang on to the corner AND the marked stones. | translate this |
| One eye kills no eyes. | translate this |
| Seki - White could have killed. | translate this |
| Choose. | translate this |
| Now Black has protected the corner and has seperated the marked stone. | translate this |
| Black has protected the corner, but that's all. | translate this |
| White gets a ladder. | translate this |
| White cannot get both A and B, so White is cut off himself. | translate this |
| Black is doomed. | translate this |
| A little more refreshing than struggling for life. | translate this |
| The exchange of A for B turns out to be ruinous. | translate this |
| Excellent aji and Black has to add another move for his stones. | translate this |
| What a mess for White, even without a ladder at A. | translate this |
| Just one example of what can happen if White tries to kill. | translate this |
| Now Black lives in sente. | translate this |
| After Black lives, an annoying cut is left at A. | translate this |
| White should now play A. | translate this |
| The cut at A won't get Black far because White has B. | translate this |
| Next probably White A. The right idea, but execution was not perfect. | translate this |
| White makes a ponnuki, but Black cleanly captures the corner. | translate this |
| Being able to play the marked stone without White capturing it is satisfactory for Black. | translate this |
| Very good for Black. White captures, but Black squeezes in sente. | translate this |
| White gets a good position on the outside and can revive the corner with A. | translate this |
| The nobi doesn't work. | translate this |
| This stabilizes White. | translate this |
| The Black stone is swallowed. | translate this |
| How to handle the marked stone? | translate this |
| Black still has the sente move at A, so the corner lives and White cannot escape. White's original hane was an overplay. | translate this |
| This last move creates bad aji. | translate this |
| The cut was hasty. | translate this |
| Ok, that's enough. (Don't play A.) | translate this |
| The ko in the corner will doom Blacks efforts to shut White in. | translate this |
| White escapes in fine shape. | translate this |
| Black wants to attack the marked stones. His corner is still weak, however. | translate this |
| White stays connected. | translate this |
| More trouble for White than for Black. | translate this |
| How to handle the Black thrust? | translate this |
| The marked exchange helps White break through cleanly. Next Wa, Bb, Wc, Bd. | translate this |
| Its easy to be satisfied with this sequence without noticing the mistake. The corner is big, but the four stones Black captures are also worth something. It comes down to White losing sente because the marked stone has lost its usefulness. | translate this |
| Next Wa, Bb, Wc. | translate this |
| Black A will put White on the run. | translate this |
| White has good shape on the outside, but a living shape would be preferable. | translate this |
| The corner is alive as it stands, so Black has a good position. | translate this |
| White is captured because of the marked stone. | translate this |
| White A kills the corner, so Black is in trouble. | translate this |
| White A kills the corner. | translate this |
| How to respond to the marked stone? | translate this |
| Now White catches Black. | translate this |
| Ko for everything. | translate this |
| White catches everything. | translate this |
| Playing this probe is better than living immediately. | translate this |
| The Black stones on the left cannot be caught (Wa, Bb, Wc, Bd) and the corner cannot live. | translate this |
| This slow connection is the price White has to pay for jumping too early. | translate this |
| If White captures in the corner Black can cut on the side. | translate this |
| Black doesn't achieve much by cutting early. | translate this |
| White has just played the triangled move. Does it leave any kind of weakness? | translate this |
| White has captured the most valuable stone and can't be stopped. | translate this |
| Thanks to the triangled stone cutting at A won't work for Black. | translate this |
| White makes a nice ponnuki, but Black captures the corner. | translate this |
| Black counters the White cut in an unexpected way after being given the ponnuki at A. | translate this |
| How to get the best result? | translate this |
| Wanted: the best endgame play in the lower left corner. | translate this |
| White now has to live quickly, making his chances in a center fight remote. | translate this |
| This is not what White had in mind. | translate this |
| A reasonable position for Black. But the chance to gain a big advantage was missed. | translate this |
| Incredibly, White has just cut with the marked stone. Please help White to regret his sin. | translate this |
| Thanks to the triangled stone the two stone squeeze wins by one move. (Don't forget to throw back in.) | translate this |
| After the triangled move Black has no choice but to concede the ladder. | translate this |
| Capturing these stones is also good for White. | translate this |
| Black keeps everything. | translate this |
| White can eat into the corner, but his original plays now look bad. | translate this |
| White's position is just a strange lump of stones. | translate this |
| Instead of actually paying the price of cutting, White should have threatened to cut. | translate this |
| The White maneuver was a little suspect. Let's call it a trick(y) play. With the triangled move, Black has just shown his innocence. (Pushing one more time is correct.) Your pity should not stop you from reaping the harvest. (Ladders are good for White.) | translate this |
| By first jumping, White gets to close in Black's corner and protect his cut with an active hanging connection. | translate this |
| The strategic goal of closing in Black's corner has been reached, but White wishes he had the hanging connection at A instead of B. | translate this |
| It would be better to have the hanging connection at A. | translate this |
| Black plays a bothersome peep in the center and switches to the side. | translate this |
| Warning: this is a nitpicker's problem. | translate this |
| Black is dead. White wins. | translate this |
| It's over. | translate this |
| Kill Black. | translate this |
| Black is about to be killed. | translate this |
| This is a mistake for White. | translate this |
| Seki. Black wins. | translate this |
| Dual seki. | translate this |
| Black is dead. White lives. | translate this |
| This didn't work. | translate this |
| No aji left. | translate this |
| Et voilà: joseki. | translate this |
| Blocking at A was not possible. | translate this |
| White lives big. | translate this |
| Breaking out immediately is not possible. If White plays the 3-3 attachment now, the loss from first struggling is considerable. | translate this |
| Black's maneuver with 7 and 9 has put the lid on White's stones. Now that White is cut off from the center, it seems that he is doomed to seek a meager life for these stones. | translate this |
| A and B are now miai. If Black C, White A. | translate this |
| Profit for White, bad aji for Black. (If Black A, White B. Capturing the marked stones with C or D has nasty aji.) | translate this |
| Saving the marked stones immediately turns out to be a burden. | translate this |
| Now moving out is good, because Black cannot connect under. | translate this |
| Destruction. | translate this |
| A is sente for connecting, so White can live without ko. | translate this |
| The marked Black stones are short of liberties. Allowing Black to play at the 4-3 point is uninteresting for White. | translate this |
| White can live in the corner in gote, starting with A for B, but then his center stones are up for grabs. | translate this |
| Good, but not perfect. Playing B immediately is superior to A. In effect, Black has made the unnecessary exchange of A for C. Black can still steal White's eyes in the corner if White doesn't play there, but the White option of playing D was created by Black A. | translate this |
| White's position disintegrates. | translate this |
| White cannot get both A and B. He really needs to attack at C. Cutting at D doesn't work either. | translate this |
| Unhappily, the shape attack fails. | translate this |
| White's corner position seems thin. But how thin? | translate this |
| The stupid looking push does the trick. | translate this |
| Smells like tesuji, but isn't. | translate this |
| A Black tenuki in this position is enough to spoil one's mood. But somehow it's difficult to find an effective move. | translate this |
| Next probably A. | translate this |
| Black is developing nicely, but the peep was a little careless. The problem is, White can make a nuisance of himself at the top with A through E. | translate this |
| Black shows some real insight into the nature of White's shape weakness, threatening twice to cut. But White's empty triangle connection, threatening A, makes Black wonder if he dealt out the proper medicine. | translate this |
| The triangled move is the kind of shape our parents always warned us not to play. Still, White is out in the open, can't be cut, and is looking for some eye shape on the side. How to handle? | translate this |
| Meet the hane seki. If Black captures at A, White captures back and wins by one move. | translate this |
| White loses because his eye is smaller. | translate this |
| Black has the bigger eye. This makes White's cause almost hopeless. | translate this |
| Black to play and save the corner. | translate this |
| White has managed to break through the gap, exposing the suspect position of the marked stone. | translate this |
| Closing the gap was not one of Black's best ideas. | translate this |
| White moves out, but the marked stone is right on the money. | translate this |
| White moves out, but it's a pity that Black got to play the marked stone, completely securing the corner. | translate this |
| If White jumps into the gap immediately, he is instantly cut apart. | translate this |
| White has just played the marked stone, apparently dashing all of Black's hopes to play a double attack against the White stones. | translate this |
| Black plays A and gets seki in gote or White plays B and lives unconditionally. | translate this |
| The triangled move proves its worth. | translate this |
| If Black A, White B, Black C, White D. (This means White does not have time to answer E at F.) | translate this |
| White can do better than ko. | translate this |
| If Black denies the connection, White gets a sente seki. | translate this |
| If Black defends the corner, White connects. | translate this |
| White can't win against the corner. (Even a temporary seki in the corner would lose.) | translate this |
| The Black peep at A denies a White connection at B. | translate this |
| Is there any hope for the marked stones? | translate this |
| Shortage of liberties. Black is dead. | translate this |
| White may catch the stones on the left by playing M4 but Black is alive. | translate this |
| Black just played the marked stone. White to kill. | translate this |
| (Two step) ko is not best. | translate this |
| Whoo-hoo! You're much smarter than I was... dang it... These other places work too. | translate this |
| Yeah... Now everything's dead. | translate this |
| 'kay... you're alive... but that sucked... try again. | translate this |
| Yeah... minimize the damage once you realize you've muffed up. That's what I did... (*sigh*) But there's a better way. | translate this |
| Oh the humanity! Make it stop! Make it stop!!! | translate this |
| Yeah... but there are still greener pastures. Try again... Mr. Cow. | translate this |
| Nooooooo! This sucks... | translate this |
| Ummm... you could've just killed him and saved yourself a point and a move... Silly-goose! Try everything again! | translate this |
| Haha! That'll teach 'em! But you still got hurt. Try not to get such a big boo-boo. | translate this |
| Oh no! Now he's trying to bust his buddy out of prison! Stop them! | translate this |
| That's a big ugly mess you got into... Let's not try to play big ugly mess go... Let's play beautiful happy go. | translate this |
| Make it go away Mommy! Make it stop! | translate this |
| I think I'm gonna cry... | translate this |
| Hehe... That'll teach 'em... | translate this |
| 'kay... you could've just killed him... | translate this |
| Yeah... I'm gonna have to go and disagree with you on that one... | translate this |
| On a scale from 1 to Uncool... this answer might be leaning on the uncool side... | translate this |
| Ummm... Let's play a different game... | translate this |
| That's not cool... You lived but he took your little babies! Stop him from doing more damage! | translate this |
| Whoo-hoo! I wish I had been that smart... (*sigh*) These other places work too. | translate this |
| Good job! You deserve a pat on the back. These other places also work. | translate this |
| Mister Smarty Pants... You deserve a sticker. These other places connect too. | translate this |
| Things are connected and looking good. These other places work too. | translate this |
| Today's lesson: Swearing in Japanese: Kuso--! | translate this |
| Because of White's mistake you did not have to lose those stones. | translate this |
| Left side is dead too. | translate this |
| (*sigh*) | translate this |
| This could take a while... | translate this |
| Ahhhh! Wait! No... Go back! | translate this |
| Black can't push... poor Black... | translate this |
| Ha! That was funny... | translate this |
| Weeeee! | translate this |
| Don't do that... (Pssssssst... It's seki.) | translate this |
| Grrrrrr... seki stuff... | translate this |
| Ahhh double atari... Don't worry... I didn't see this one either... | translate this |
| White misses a key move... | translate this |
| This is best for both. White gains 8 points, Black retains 14 points in the corner. | translate this |
| If the problem was ''Let White have the corner'' than you'd be awesome! | translate this |
| Let's play Old Maid... Yeah! Old Maid gets really intense once you get down to the last 3 cards! Which one to pick... Which one is the Maid! Ahh! The pressure! | translate this |
| 'kay... the problem was to STOP White from causing damage... It's okay... We're all confused once in a while. | translate this |
| White just invaded here. Stop him! | translate this |
| Slightly favorable for Black. | translate this |
| Still a ladder. | translate this |
| Favorable for White. | translate this |
| Not good enough. | translate this |
| (6 at 13) White 16 is not recommended. (It should be at 17.) But now White is threatening 2 ladders at once, so Black has his own share of trouble. | translate this |
| Black's play seems a little strange, but the possible atari at A is life insurance for the Black stones. | translate this |
| The marked stones are quite dear to Black. How to keep the fire cooking? | translate this |
| White to capture the marked stones. | translate this |
| You go, you person you! With the brains that you got there! Yeah! | translate this |
| Yeah that would work... If it wasn't against the rules! | translate this |
| Ko fight! Ko fight! But if there aren't any left on the board, I think you lost this one... | translate this |
| Yeah, that would work... If it wasn't against the rules! | translate this |
| Seki is nice, but you could've completely destroyed the group. | translate this |
| You are awesomeness incarnate! I mean... I mean wow! You! Wow! | translate this |
| S16??? You're weird... | translate this |
| Ko. (But if there were no other threats you'd be taking him down! So kudos for that I guess...) | translate this |
| Seki is nice, but you could've destroyed the group. | translate this |
| The Black stones have just insulted your Father. Kill them. (Without ko.) | translate this |
| Direct ko. (Connecting at A wins for Black.) | translate this |
| Or A or B. | translate this |
| Black wins now. | translate this |
| White will make no eye on the left, so he will later defend at A7 and the capture at J5 decides the game. | translate this |
| White had the right idea with A but oh too late. | translate this |
| White submissively answered Black's sente moves (which is locally correct) and thus lost 4 points. | translate this |
| This is the right spirit: ignore the Black sente at J4 and do the same to him. Continuing with mirror go, here is a simple sure win strategy. | translate this |
| Black has just played at A. What to do now? There is a 0.5 komi and no captures were made. | translate this |
| A loose ladder and a net. | translate this |
| To throw away these 4 stones was unnecessary. | translate this |
| On this side the tesuji doesn't work. | translate this |
| White captures Black's cutting stones. That is alright, but Black's stones have one more liberty and one more peep (at A and B) than in the correct solution. When you capture cutting stones, you want to capture them as tightly as possible. So unless N13 is an important tesuji for some other problem on the board (not here, obviously) it is inferior. | translate this |
| Black has just played A. Can White capture? If not, play B. | translate this |
| A and B are false eyes. | translate this |
| Now the left side has a pretty hat. | translate this |
| You found the secret letter answer! Wow! Letters everywhere! | translate this |
| You found the secret triangle answer! Triangles everywhere! | translate this |
| You found the secret fill in all the stones answer! Stones everywhere! Wow! | translate this |
| Oh no! White's called for reinforcements! You're really screwed now! | translate this |
| You found the NO answer! Yeah you! | translate this |
| Let's play Tetris! | translate this |
| The rest of the board is settled. (Black and White have no ko threats.) White to kill. Use H5 for tenuki. | translate this |
| White to capture the cutting stone. | translate this |
| Well, Black could kill. Sorry. | translate this |
| This sequence forced my 2 dan opponent to resign, hardly 30 moves being played. Well, it was a leisurely handicap game late in the evening, but it still felt great :-) | translate this |
| Ko. Black can do better. | translate this |
| Black played at A and White played B. He didn't like R17 which leads to a ko (I hope this is correct). But was his defense at B a good choice? If you can kill, do so. If not play at C. | translate this |
| White gets a gote seki and wins the game by half a point. This seki is worth 7 points in gote. | translate this |
| White gets a gote seki and wins the game by half a point. White made 7 points in gote here. | translate this |
| White gets a gote seki here. Black G1 wasted another two points compared with Black H1, for example. White wins by 2.5 now. | translate this |
| This move is worth 7 points in gote. B2 is only 5 points in gote. So White didn't answer A4. | translate this |
| White should't play here (compare the Black A4, White H2 path), but even this proves the Black move wrong: Black E9 and he has gotten only 2 points in gote. The lower left is bigger. And if Black tenukis he has gained nothing on the upper side. (Actually, he lost something there.) | translate this |
| White wins by half a point. | translate this |
| Seki. Black's gain in the other corner doesn't make up for it. | translate this |
| Seki. Black's gain in the lower left doesn't make up for it. | translate this |
| Now it dawns on Black that he had been too careless about the lower right. (White H2 is a ko threat.) | translate this |
| White cannot avoid the ko at A3 or he looses. | translate this |
| G1 leaves bad aji in that corner. | translate this |
| Seki. Black's gain in the other corner doesn't make up for that. | translate this |
| H1 leaves bad aji in that corner. | translate this |
| Sorry, but Black could not avoid the ko at A4. White wins by half a point. | translate this |
| H3 leaves bad aji in that corner. | translate this |
| J2 leaves bad aji in that corner. | translate this |
| None of the players could avoid the ko at A3. Now you see why H2 is the only correct move in the lower right. This way White has only one ko threat at D8 (the C9 threat later is too small). So Black wins this ko (he has a threat himself at F6) and thus the game. | translate this |
| Sorry, but Black could not avoid the ko at A3. White wins by half a point. | translate this |
| Black has catched himself just in time and changed his play to the correct place (H2). Both players should have played there instead of A and B at the problem start. You got it right. Just proceed for 2 or 3 moves. | translate this |
| Black has played at A and White answered servile at B. There is a 0.5 komi and no captures were made. How does Black win now? | translate this |
| Ko for connection, but you wasted ko threats. | translate this |
| Ko for connection. | translate this |
| There is a better ko for Black. | translate this |
| You didn't bring the stones in the corner to full use. | translate this |
| Black cannot play Q19. | translate this |
| There's a better ko for Black. | translate this |
| Black to play. What can you do with the triangled stones? | translate this |
| Now THAT'S sneaky. White has 15 to your 20, now. | translate this |
| Why throw away stones? | translate this |
| Wasted effort. | translate this |
| White loses the corner and the game. | translate this |
| No, that wasn't it... | translate this |
| Yeah, and? | translate this |
| There WAS a point to that, right? | translate this |
| Bent five in the corner? | translate this |
| Ooh, so close. | translate this |
| Black wins since she has ko threats and White doesn't, but this is rather tedious. | translate this |
| Whoops... | translate this |
| Winners don't do drugs. | translate this |
| Okay, now what? | translate this |
| It seemed like a good idea at the time... | translate this |
| Um... crack kills, mmkay? | translate this |
| Newp. | translate this |
| Nada. | translate this |
| Zip. | translate this |
| Is there a pattern here? | translate this |
| Well, THAT was stupid... | translate this |
| While not necessarily wrong, as it forces White to reply, this doesn't accomplish anything and wastes a ko threat. | translate this |
| These stones are already captured. There is no need to waste a move and decrease your own territory. | translate this |
| Black is down by a point. How can she win? (No captures have been made.) | translate this |
| White will lose something. | translate this |
| Without a ladder at A, Black is badly off. | translate this |
| Ladders are bad for Black. | translate this |
| White to kill Black without ko. | translate this |
| He gave his life for the benefit of the cause. We'll remember you, P4! | translate this |
| This definitely works, but going at P4 first may have been better, as explained in the comments by Tommy 3d. | translate this |
| Black doesn't realize that you can hurt him, so give him a jolly rogering. | translate this |
| 1 point in sente is not the biggest. | translate this |
| White N5 has been a 4 point gote play and a simple endgame tesuji. If you wonder why it's not three points: White M6 is a 1 point sente move later, so we add this point to the three points White has destroyed. | translate this |
| J13 was 2 points in gote and a mistake, as it allowed Black to play K11. | translate this |
| K11 was 3 points in gote: not the biggest point. | translate this |
| Black tenukis on the upper side and plays the bigger point. | translate this |
| White to play the biggest endgame move on the upper or right side. The lower left and the center are not existing for you. | translate this |
| Not the best ko for Black. | translate this |
| Black to make points in the corner. | translate this |
| See problem 1505. | translate this |
| Is it possible to utilize the marked stones? (Assume that any moyo built in the region of A has little value.) | translate this |
| White 4 here is definitely not a good move. See the variations for more information. | translate this |
| What is the best way to save the marked stones? | translate this |
| Black to move. What is the result? | translate this |
| This move both saves Black's group and creates a bit of thickness facing his komoku. | translate this |
| It's the famous two stone seki! | translate this |
| White puts a stop to your evil plans! | translate this |
| Ko in White's favor. White stands to lose a lot, so a suitable threat is unlikely. | translate this |
| The pain of loss. | translate this |
| Ko in favor of Black. Given the size of the prize, it's unlikely that White has a viable threat. | translate this |
| White = 0wz0rd. | translate this |
| Dead as a proverbial doornail. | translate this |
| Butt-whooped. | translate this |
| Would be seki, but B1 works for Black. | translate this |
| Divided and conquered. | translate this |
| Whoopsie. | translate this |
| Correct. | translate this |
| Black is killed. | translate this |
| Wrong. Black can be saved. | translate this |
| Can Black save his group? If not, choose A. | translate this |
| This kills the entire White group. | translate this |
| What is the best move for Black? | translate this |
| The ladder fails. | translate this |
| Is it possible to capture the White stone in a ladder at A? If not, please play at B. | translate this |
| The ladder works. | translate this |
| Sorry, but the ladder works. | translate this |
| This move is forbidden by the ko rule! | translate this |
| Black cannot get two eyes. | translate this |
| White to kill all the marked stones. | translate this |
| Failure: ko. | translate this |
| Good job. Seki in sente. | translate this |
| Come on! Capture it! Capture it! | translate this |
| I've marked the dead stones just in case you were wondering... All the way to Q. | translate this |
| Yeah, that went well.... :) | translate this |
| Nononono... not best move to die quickly... | translate this |
| Weeeeeeee! | translate this |
| The White stones gave you a boo-boo. | translate this |
| Look at the cute lil' guy hiding in the corner while his friends die... I'll call him Jim. | translate this |
| Seemed like a good idea... wait... no it didn't... | translate this |
| Please bunch the stones up more if you can... | translate this |
| Best move for Black. | translate this |
| Great! Bunched... but alive in gote. | translate this |
| Please try to save more. | translate this |
| Great! Bunched together but connected in gote. | translate this |
| You're already alive around there silly! :) | translate this |
| ? | translate this |
| Try to live. | translate this |
| The group with the eye wins the capturing race. | translate this |
| What happens in this capturing race? | translate this |
| White can live in seki. | translate this |
| White can get a ko. | translate this |
| White can get a better ko. | translate this |
| Black kills. | translate this |
| Now the problem is to try to do something with the White bottom left corner. | translate this |
| Black lives with a double ko. | translate this |
| Now the problem is to try to kill the Black bottom right corner. | translate this |
| Black just played the marked stone. If you think White has to respond to keep the Black stones dead play at A and if you don't, play at B. | translate this |
| White dies without ko. | translate this |
| This sequence is a little messy, but it works. | translate this |
| White just played 1. How to respond? | translate this |
| Black cannot connect: no ko. | translate this |
| Black played 1. How to respond? | translate this |
| Black cannot push; White lives. | translate this |
| White has to protect at A, B, or C to get a seki. White can do better. | translate this |
| Black starts a ko or gets a seki by playing at A instead. White can do better. | translate this |
| White dies (the three stones are caught in a snapback). | translate this |
| Black starts a ko or plays at A to get a seki. White can do better. | translate this |
| White has only one eye and dies. | translate this |
| White dies. Defending the cut at A leaves one eye. | translate this |
| White dies (the four stones in an L are caught in a snapback). | translate this |
| White dies (even without the last Black move). | translate this |
| Illegal ko capture. (Did you READ the problem text?) | translate this |
| Black wins by 2 points. White could have obtained jigo. See variations. | translate this |
| This really looks strange. First Black plays inside his own group, making a third eye. This frightens White so much that he has to make a third eye himself. But it is actually the only way to avoid losing by both players. Black wins the ko: result is jigo (draw). | translate this |
| White wins by 2 points. | translate this |
| White wins by 3 points. | translate this |
| Black has lost 15 points to gain 1 point. | translate this |
| Black has lost 5 points for no purpose. | translate this |
| You have lost 19 points to gain 1 point. | translate this |
| You have lost 5 points for no purpose. | translate this |
| White wins by 7 points. | translate this |
| White has just taken the ko in the middle. So don't play at A. If Black lets White connect the ko, he loses by 1 point. (No komi.) What can he do? | translate this |
| Good job. Black can't push but you can kill at A. | translate this |
| Good job. Black is about to die! | translate this |
| White cannot attack both A and B; Black Lives. | translate this |
| White to kill. Right out of my head, so it shouldn't be too tricky ;) | translate this |
| Black is alive with two points in gote. White can further reduce Black to 2 points at A or B later. Black can do better. | translate this |
| Black is alive with 2 points in gote. Black can do better. | translate this |
| Black is alive with 4 points, in gote. Black can do better. | translate this |
| Black defends and retains 5 points in sente. | translate this |
| White has just played 1. Where should Black respond? | translate this |
| If you can kill the marked stone, kill it. Otherwise play A. | translate this |
| White can fight a ko for life. | translate this |
| Please place a 9-stone handicap. | translate this |
| Black to do something inside White's territory. | translate this |
| What can White capture? | translate this |
| Good move, playing at A -- using sente to eliminate the bigger Black ko threat at B. | translate this |
| When Black connects at A, White lives with B. | translate this |
| White is dead; only one eye (at A -- B is a false eye). | translate this |
| White is dead -- only one eye (at A: B cannot be more than a false eye). | translate this |
| Roundabout; but I guess it works. | translate this |
| Destroying your own eyespace does not help. | translate this |
| Black can even play elsewhere; A is a false eye. | translate this |
| Even if Black plays elsewhere, White will die. | translate this |
| You cannot make two eyes when you destroy your own eyespace. | translate this |
| White is dead even if Black plays tenuki instead. | translate this |
| White cannot make two eyes even if Black plays tenuki this move. | translate this |
| You cannot live if you destroy your own eyespace. Talk about dying in gote... | translate this |
| White has only one eye. | translate this |
| White is dead; only one eye. | translate this |
| (Actually, Black can tenuki and still kill White.) | translate this |
| Oops - you destroyed your own eyespace. Now you cannot make two eyes. | translate this |
| White can live without ko. | translate this |
| Find a better way. White can live without resorting to ko. | translate this |
| Actually, Black can tenuki and White will still die. | translate this |
| Black can even tenuki; White still cannot make two eyes. | translate this |
| Actually, White is dead even if Black plays tenuki. | translate this |
| Black can even tenuki this move, and White still dies. | translate this |
| Black does not even need this move; White dies anyway. | translate this |
| White is dead. (Actually, Black can tenuki, and White is still dead -- only one eye.) | translate this |
| White is dead. (Black can even tenuki this move, and White still cannot make two eyes.) | translate this |
| Black can even tenuki this move, and White still cannot get two eyes. | translate this |
| Only one eye, at A. (B and C are false eyes.) | translate this |
| Running away will not work. White can live inside. | translate this |
| Only one eye, so White dies. | translate this |
| It is hard to make two eyes if you destroy your own eyespace. | translate this |
| White dies even if Black plays tenuki here. | translate this |
| Actually, White dies even if Black plays elsewhere. | translate this |
| Running away does not help... White must live inside. | translate this |
| Destroying your own eyespace will not help. A is not an eye. | translate this |
| You certainly cannot live if you destroy your own eyespace. | translate this |
| White is dead even if Black tenukis. | translate this |
| You will not get two eyes that way. | translate this |
| White can live inside -- running away will not work. | translate this |
| Now that you have destroyed the White eyespace, Black can even tenuki instead. | translate this |
| White dies even if Black plays elsewhere. | translate this |
| Black can tenuki instead. | translate this |
| Note that A is not an eye. | translate this |
| Filling your own potential eye will not help. | translate this |
| Actually, Black should tenuki here. | translate this |
| White dies even if Black tenukis. | translate this |
| Actually, Black can tenuki and still kill. | translate this |
| White has only one eye. A and B cannot become eyes for White. | translate this |
| White dies even if Black plays tenuki. | translate this |
| Black can even afford to tenuki. | translate this |
| White invaded the upper side. Black fought back; but there may be weaknesses White can exploit... | translate this |
| Like this White can't make two eyes. | translate this |
| Like this you are in a seki. | translate this |
| How can Black kill White? | translate this |
| You got White. This technique of sacrificing a stone on a connection point is called horikomi. | translate this |
| How can Black kill White? You must sacrifice stones to succeed. | translate this |
| Just because it feels so good... | translate this |
| Eye in the stomach. | translate this |
| Assuming the life of the group is in question... | translate this |
| Seki. But why? | translate this |
| T for tenuki? | translate this |
| A nakade, good for you. | translate this |
| Wrong way. Bent four is alive. | translate this |
| Ko. It's in White's favor so hey, you win I guess. | translate this |
| Oops... | translate this |
| Ko, in Black's favor. | translate this |
| Almost, but not quite. | translate this |
| Good. | translate this |
| Ko in Black's favor. | translate this |
| False eyes. | translate this |
| Not yet. | translate this |
| No... | translate this |
| Now, if only Black would do that... | translate this |
| White to kill. Yes, it actually can be done. | translate this |
| These stones are irrelevant to the life or death problem - White can make two eyes as shown or tenuki and win the semeai later if Black captures at N18. | translate this |
| Ko is the best you can get. Next White A, Black B, White takes the ko at C and Black starts with a local ko threat at D or E. | translate this |
| White has just played the triangled stone. What can Black salvage from his group in the top right? | translate this |
| Comb formation is alive, so playing G2 is worth -1 in gote and White kills the B6 group. | translate this |
| Comb formation is alive, so playing G1 is worth -1 in gote and White kills the B6 group. | translate this |
| Tripod group is alive, so playing T3 is worth -1 in gote and White kills the B6 group. | translate this |
| Tripod group is alive, so playing T2 is worth -1 in gote and White kills the B6 group. | translate this |
| Tripod group is alive, so playing S2 is worth -1 in gote and White kills the B6 group. | translate this |
| The B6 group is worth much more than the T18 group. | translate this |
| L group is dead - so after playing B18 Black needs one more move to live in the corner. In that time White can finish off B6 and L17 groups. | translate this |
| The B6 group is worth more than the L17 group. | translate this |
| Wrong: A6 has bigger endgame value than A12. | translate this |
| Black to live with as many groups as possible, with optimum result -- center can be ignored. | translate this |
| Four on the third line is dead. | translate this |
| Door formation is dead. | translate this |
| Gun six can be turned into seki by White; the S18 group is the biggest play. | translate this |
| Gun eight group (A5 group) is alive (no seki) because of the liberty at A6. | translate this |
| The S18 group is bigger than the J group. | translate this |
| Three space notchers (R10 group) can be turned into seki after White T9, T11 -- the S18 group is bigger. | translate this |
| A18 is enough for the J group to live. | translate this |
| Black can't save this group. | translate this |
| The left bottom corner is bigger. | translate this |
| Now what? No more letters for you ;) | translate this |
| Black can't save this group now. | translate this |
| Black gets 5 points for preventing seki, but loses big time in the left top corner. | translate this |
| Gun eight group is alive, no seki, because of the A6 liberty. | translate this |
| Where to play now? | translate this |
| Black to gain the optimal result here -- please play A, B, C, D, E, F or G. | translate this |
| Deny the chance of White ko. | translate this |
| Don't let White try to get a ko. | translate this |
| No room for another White eye. | translate this |
| Stop White from trying the ko in the corner. | translate this |
| There is no place for White to get another eye. | translate this |
| Actually, White does not even need to play this move yet. | translate this |
| Self-atari does not help here. | translate this |
| Hello? | translate this |
| White is usually dead here; however, this is less than best, because Black must kill via 'bent-four-in-the-corner'. If White ends up with a non-removable ko threat, then this may end up alive in seki, under some rulesets. Find the more immediate path to victory. | translate this |
| White lives -- an eye at A and an eye at B. White just needs to connect at C when Black plays D or, to start ko, E. Try again, Black... | translate this |
| White's eyespace is ruined. | translate this |
| White lives with eyes at A and B. | translate this |
| Stop White from getting a ko -- there are better ways to kill. | translate this |
| Bulky five dies. | translate this |
| Stop White from trying for ko. Kill more surely. | translate this |
| Deny White a chance at ko. | translate this |
| This kills via 'bent-four in the corner'. If White develops an unremovable ko threat, then Black may find that White lives in seki, under some rulesets. There is a better way to kill this. | translate this |
| Don't let White try for a ko. | translate this |
| This works, but I think it's inferior because: What if White does not play A18 right now, but saves it for a ko threat? Black can kill without giving White such a chance. | translate this |
| Don't let White get a ko. | translate this |
| This works, but I dislike it. Suppose White does not capture with C18 right away, but saves it for a threat in a ko fight. Black has better ways to kill. | translate this |
| Stop White from getting a ko. | translate this |
| This sets up 'bent-four in the corner', which is almost always dead. However, if White comes up with an unremovable ko threat, then White may live in seki, under some rulesets. Find a more direct way. | translate this |
| This seems to work, but I dislike giving White a ko threat. (Suppose White does not capture with A18 right now; then White H. A18 will be good in a ko fight.) There is a simpler way. | translate this |
| Don't let White try for a ko. There is a better way to kill. | translate this |
| White is dead, but wants you to prove it. Please move at T for tenuki to start this problem. | translate this |
| Now White can't push in at B18. White loses 5 points of territory and Black gains one more point at A19. Black now wins by 2.5. | translate this |
| That is just dame. | translate this |
| Wrong. Black can still win. | translate this |
| Black destroys his last chance. | translate this |
| Should nothing happen, White will win by 11 points. But can Black turn the tables? If you think he can't, play at A. Unnecessary forcing moves have been blocked to limit variations. | translate this |
| The snapback that wouldn't die! | translate this |
| Not quite. | translate this |
| Eh? | translate this |
| Black weasels out of it! | translate this |
| Nice try, but something's missing... | translate this |
| Black is caught! | translate this |
| Wha? | translate this |
| Black gets two eyes. | translate this |
| White only gets two stones. | translate this |
| Clever, but not clever enough. Black is still alive. | translate this |
| White to kill. Yes, everything. | translate this |
| Black survives and wins the corner! | translate this |
| White's group has 3 liberties and you have 2, so he wins the capturing race. | translate this |
| Black still dies. | translate this |
| This way to kill is too slow and White can kill you before you kill him. | translate this |
| It doesn't change the situation. | translate this |
| White cut the connection. | translate this |
| How can Black save the marked stone? | translate this |
| Please answer White's ko threat at A. | translate this |
| Black to kill (should be really easy). | translate this |
| White wins the corner if she has enough ko threats. | translate this |
| It's going to be tough for White, and he may end up in a ko. There's a better way. | translate this |
| This is what happened in the game. Here 'useless' coincidentally disconnected. | translate this |
| Seems to work. | translate this |
| How can White best save his ugly blob in the upper-right, while killing Black's surrounded stones? | translate this |
| White steals points in the corner. Not good enough! | translate this |
| Unnecessary ko. | translate this |
| Disaster. | translate this |
| The White stones can't get away. | translate this |
| Black's corner stones are alive. White can't make an eye in the remaining space, and Black can, so all Black's stones live. | translate this |
| White has just played the marked stone. How much can Black keep? | translate this |
| White just failed to play at A, assuming he would lose only the 4 stones on the left. Show him otherwise and kill the whole corner. | translate this |
| Now White has only one eye. The other is a false eye. White dies. | translate this |
| Mai was wrong. White can form two eyes. | translate this |
| White can form two eyes. No way to stop him. | translate this |
| Yuuki's choice. He was wrong. White has two eyes and lives. | translate this |
| White can form two eyes like that and you can't stop him. | translate this |
| White to play and kill the Black stones. | translate this |
| White to move. He can kill the Black stones! | translate this |
| Black takes the ko first. | translate this |
| With such a big eye White wins the capturing race. | translate this |
| Black A would have worked if the Black stones on the right had had one extra liberty. | translate this |
| White's big eye wins the capturing race. | translate this |
| White takes the ko first. Black can do better. | translate this |
| It's a ko and Black takes first. | translate this |
| White's eye is big, so White wins the capturing race by several moves. | translate this |
| White wins the race because of his big eye. | translate this |
| White can connect. | translate this |
| White is one liberty ahead. | translate this |
| Save the isolated Black stones. | translate this |
| It's a seki, counting three points for Black (the three captured stones). If he had answered the marked stone, there would have been ten points of territory: Black lost seven points here! | translate this |
| This isn't Blacks best try: he only has five points left compared to the six White earned, and it is gote also. Black should have played 2 at the marked point! | translate this |
| This comes to nothing. | translate this |
| White to move! What can he do? | translate this |
| Eventually, White will capture at A and live. | translate this |
| Black successfully prevented White from getting two liberties (in which case White would be able to atari at A), but in the process White has gained a ko threat! | translate this |
| From now on it's plain sailing again. | translate this |
| White wants to capture at A, but before that he needs at least a ko threat or two liberties. Black prevents this as long as possible! | translate this |
| This is a mistake by Black. A is the only move! | translate this |
| White is alive, but only because Black made a mistake: he can't atari with the marked stone! | translate this |
| Since there is no ko threat, White is dead: Black will connect at A with his next move. Taking the ko (the marked stone) was a mistake! | translate this |
| There is only one eye in the corner, and it's impossible to gain another in the center: White is dead. Taking the ko (the marked stone) was a mistake! | translate this |
| Black plays this way in order to prevent a second eye. Now, if Black can play A, White will be dead even if he captures the five Black stones. Therefore he must gain a liberty and then play B. | translate this |
| You already know this :) | translate this |
| ... and retakes the ko. | translate this |
| Finally, White got a chance to take the ko, but Black gives one more atari... | translate this |
| U | translate this |
| Obviously, White can't take the ko. That is, for the moment! | translate this |
| So Black has no choice... | translate this |
| Black has to prevent a White move at A. | translate this |
| White to play and save the marked stones! | translate this |
| This is a two step ko. | translate this |
| This is a direct ko. White should have played S19 at A! | translate this |
| Of course White doesn't allow a ko by playing T18 at A! | translate this |
| This is not small, but Black can do better. | translate this |
| After the White mistake earlier, the same position as in the solution is reached, a two step ko for Black. | translate this |
| After the White mistake earlier, the same end position as in the solution is reached. White S19 was another mistake: White T17 is better! Now Black has a direct ko. | translate this |
| This is a mistake. Black can reach the solution now. White shouldn't connect! | translate this |
| White lost some points in the corner, but there is no danger of losing the whole group now. | translate this |
| This White 2 is better than connecting. | translate this |
| This only works if White makes a mistake. | translate this |
| Possible, but A is better. | translate this |
| Now White can't get two eyes. | translate this |
| White lives! | translate this |
| Black has captured three stones, but the White group lives. | translate this |
| There is no weakness in White's formation, he lives without any problems. | translate this |
| In this position, D15 is an eye! | translate this |
| There is no weakness in White's formation now, so he lives without any problems. | translate this |
| The Black hane looks dangerous, but White connects and can live after that. | translate this |
| Now Black can fight a ko. | translate this |
| This is wrong: Black can't play T1, and loses all his stones. | translate this |
| Black can't play T1, so he is dead. | translate this |
| White wins by one point. | translate this |
| There was no ko threat for Black! | translate this |
| Of course Black doesn't capture at B1! | translate this |
| White loses the capturing race by one move: F2 wasn't a good enough ko threat. | translate this |
| There is no White ko threat. | translate this |
| No komi given, no prisoners taken. White to play and win! | translate this |
| Now White can't play B4, so he is dead. | translate this |
| B6 is a false eye, so White is dead. | translate this |
| Black to move and kill the White stones on the left. | translate this |
| White to kill the Black group. | translate this |
| The seven White stones are lost! | translate this |
| Connecting is bad; now White captures some stones! | translate this |
| If Blacks plays this atari first, White doesn't connect but extends and now threatens to play A, B, or C. | translate this |
| White just atari'd with the marked stone. What is Black's best answer? | translate this |
| White would like to connect at A, but then Black plays at B and White can't connect at C because he is short of liberties. | translate this |
| Black to play. Is there a way to stop White from getting two eyes? | translate this |
| White's C3 Group cannot escape. | translate this |
| Black captures two White stones eventually, but it is possible to get the five stones in the corner. Try again. | translate this |
| White is out in the open: Black A16 was too ambitious. | translate this |
| Ko! This is best for both. | translate this |
| White lives: this is the worst for Black. | translate this |
| In this variation (started with Black C18) White can do better than a ko. | translate this |
| White is out in the open. Black A16 was too ambitious. | translate this |
| Ko. This is best for both. | translate this |
| Black accomplishes nothing. | translate this |
| Wrong: Black can save his group. | translate this |
| Can Black save the G9 group? If you think he can't, play at A. | translate this |
| White can play A or B next. | translate this |
| White captures the two Black stones. | translate this |
| White captures the Black stones. | translate this |
| This is not good enough for White. | translate this |
| In the solution, the White A for Black B exchange is in place, so White wins the semeai, but in this variation Black simply captures White. | translate this |
| After this exchange, White can't do anything. | translate this |
| White wins by one point! | translate this |
| Jigo! This is not White's best, but the game ended this way. | translate this |
| Jigo! This is the game. | translate this |
| Black wins by one point! | translate this |
| Black A is good, too. | translate this |
| Black just played at A. Can White win after this? | translate this |
| Two eyes. White A3 would have been slightly better; B1 is inside your own territory. | translate this |
| White can't take away Black's liberties, so he is dead! | translate this |
| White is short on liberties! | translate this |
| White to move. How can he save his stones? | translate this |
| If now White A, Black can cut with B, White C, Black D, so the White thickness isn't worth much. | translate this |
| Nice White center thickness! | translate this |
| Very thick thickness for White :) | translate this |
| If White A, Black B and Black is safe. | translate this |
| White has secured nice center thickness. | translate this |
| Black is separated. | translate this |
| Nice center thickness for White! | translate this |
| Black to play. Don't help White too much! | translate this |
| Good, but Black smartly took sente with L1. | translate this |
| This should actually be at L1. | translate this |
| In sente, but the extra stone at g3 was unnecessary. No loss though. | translate this |
| This works, but not the best way to do things. | translate this |
| White ran out of liberties; ko at most. | translate this |
| Hard ko for Black, but White could have succeeded without ko. | translate this |
| Ko is not necessary. | translate this |
| Of course. Black's only choice. | translate this |
| Right. Black couldn't connect. | translate this |
| Another big mistake by Black. | translate this |
| This wont work. | translate this |
| Black will have a hard time winning this ko, but White could have succeeded without ko. | translate this |
| Ko is unnecessary. | translate this |
| That's two eyes for Black. | translate this |
| Two eyes for Black. | translate this |
| After the sequence, Black makes the mistake of move 8. How to punish? | translate this |
| Black is dead! | translate this |
| White can't play B because of the snapback, so this is only a ko! Black A or B instead of B19 would allow White to play B19 himself and kill Black as in the solution. | translate this |
| The A17 stone is not important! | translate this |
| This is only a ko! | translate this |
| Only ko! | translate this |
| White to move! | translate this |
| Black lives! | translate this |
| Black to play and live! | translate this |
| Black is alive and White's D12 group gets into trouble. | translate this |
| Black gets caught. | translate this |
| A is better! | translate this |
| Black is a liberty short. | translate this |
| This is not good enough. | translate this |
| This is not as good as the solution. | translate this |
| Black to move! | translate this |
| How to handle White 1? | translate this |
| And Cho Chikun resigned... | translate this |
| If that was the solution, it wouldn't be much of a problem, would it? | translate this |
| Black fails. | translate this |
| Far from best answer. | translate this |
| And you were so close... | translate this |
| Good job! | translate this |
| And you were soooooo close to the good answer :) | translate this |
| ^_^ | translate this |
| If that were the solution, it would not be much of a problem, would it? | translate this |
| This is far worse than the best answer. | translate this |
| Ahem... | translate this |
| Black's attack fails. | translate this |
| That's far from the best answer. | translate this |
| White connects at 3. What is the best response for Black? | translate this |
| 'Save the ko for last' - since there is no Black ko threat, White wins by 1 point! | translate this |
| Since there is no ko threat for White, taking the ko first is a mistake: Black wins by one point! | translate this |
| White has no ko threat here. | translate this |
| This is only a jigo - taking the ko was wrong! | translate this |
| White to play and win. | translate this |
| Thanks to the exchange of the marked stones there is no White ko threat left, so Black can connect the ko and win by 1 point. | translate this |
| If Black takes the ko at once there remains a White ko threat at the bottom. White can recapture the ko and a jigo results. | translate this |
| Ignoring the White ko threat gives Black not more than a jigo. | translate this |
| No komi, no prisoners - Black to play and win. | translate this |
| Black connects the ko and wins by one point. | translate this |
| E7 was a ko theat! | translate this |
| Black has no more ko threats, so White will connect - jigo! | translate this |
| E7 was a ko threat! | translate this |
| Black is a ko threat short, so White will connect and secure a jigo. | translate this |
| E7 was a ko threat. | translate this |
| White will connect next - jigo! | translate this |
| Connecting is secure but leads to a jigo. | translate this |
| This is only a jigo. | translate this |
| In the end, it's a jigo. | translate this |
| White wins by 1 point. | translate this |
| This kills the corner. | translate this |
| White wins by 3 points - connecting the ko was wrong. | translate this |
| Black can't play this ko because his whole corner is at stake. | translate this |
| Black must first defend at the bottom. | translate this |
| The Black group is dead! | translate this |
| No komi, no prisoners - Black to play and draw! | translate this |
| And White connects the ko - jigo! | translate this |
| And White connects the ko - jigo. | translate this |
| Black loses by 1 point. | translate this |
| Next, Black connects the ko and wins by 1 point! | translate this |
| Black connects and wins by 1 point. | translate this |
| Black wins! | translate this |
| Black connects the ko and wins by one point! | translate this |
| Jigo! | translate this |
| Jigo again! | translate this |
| This is pointless - White has lost 7 (!) points. | translate this |
| Thanks to the ko, White gained some points, but it's still not enough: Black wins by 1 point! | translate this |
| Black wins by 6 points. | translate this |
| Black wins by 2 points. | translate this |
| Black wins by 1 point! | translate this |
| Black wins by 6 points! | translate this |
| Black wins by 2 points! | translate this |
| Black wins by 7 points! | translate this |
| Black wins by 3 points. | translate this |
| No komi, no prisoners - White to play and draw! | translate this |
| White M11 dies, and White eventually has to plug up N6. | translate this |
| White M11 lives. | translate this |
| This is a three-stage ko for White to make M11 alive, though there's little chance... | translate this |
| Finish M11 off (assuming that bottom groups are alive). | translate this |
| Black got White. Pretty simple, no? | translate this |
| How should Black play? | translate this |
| White loses the upper part. | translate this |
| White can save F10, if need be. But the top is lost and Black is connected. | translate this |
| White covers the cutting point. You can have just one stone. | translate this |
| Two very happy White stones celebrate their unexpected rescue. | translate this |
| Black to kill the upper part. | translate this |
| White is seriously hurt! | translate this |
| White manages to limit the damage in sente. H12 becomes a wasted move. | translate this |
| A better defense by White. Black does take profit in sente though. | translate this |
| Correct way for Black to play. | translate this |
| White was able to draw the game. | translate this |
| White has won the ko, but Black wins the game by 1 point! With his ko threat at D1, White gave Black an extra prisoner. | translate this |
| Black will connect the ko and win by 1 point -- the White ko threat at E1 made the Black threat at E4 possible. | translate this |
| White must answer the Black ko threat! | translate this |
| With this, White plays a ko threat before the ko even started! | translate this |
| With this, White plays a ko threat before the ko even started! There is one more at E3, so it seems still to be okay, but he also loses a point by sacrificing on a dame point -- Black will win by 1 point! | translate this |
| White to play and draw! | translate this |
| Doesn't it give a new meaning to the word 'throw-in'? | translate this |
| Doesn't it give a new meaning to the word 'throw-in'? (This is the dual solution with T18 and T15 exchanged.) | translate this |
| Something wrong with the order... | translate this |
| Not working. | translate this |
| Not this way... | translate this |
| Not the desired outcome... | translate this |
| Black is short of liberties. | translate this |
| Black to play and get a ko (really!). | translate this |
| White connects the ko - jigo! | translate this |
| This is bad - White wins by one point. | translate this |
| Now Black can't get a ko with A2 (White A2 is good, too). | translate this |
| This is wrong - please look at the 'supplement 2' problem! | translate this |
| No prisoners, but White received a 3 point komi - that is enough to draw the game! How should White play? | translate this |
| This is a seki, so White can't ignore Black F1! | translate this |
| This is a seki, so White can't ignore Black G2! | translate this |
| In this position, D6 is no ko threat! | translate this |
| No prisoners, but a 3 point komi for White -- Black to play and win! | translate this |
| Good job. Miai for an eye on both sides. White dies. | translate this |
| Good job. Miai for an eye on both sides. | translate this |
| And White lives. You descended down at H1 too soon. | translate this |
| And White is quite alive. | translate this |
| This is a false eye, so White is dead! | translate this |
| White is dead. White A16 isn't even sente. | translate this |
| This is a false eye, so White is dead. | translate this |
| Now White A16 isn't even sente. White is dead! | translate this |
| White lives -- A18 was wrong! | translate this |
| Thanks to the liberty at A14, White is alive! | translate this |
| White sacrifices a stone and lives. | translate this |
| Too easy for White. | translate this |
| A nice move! White lives. | translate this |
| No! White lives! | translate this |
| A ko? | translate this |
| Black to play! Can he kill the White group? | translate this |
| An unconditional seki. | translate this |
| White to force an unconditional seki. | translate this |
| White is caught in damezumari. | translate this |
| Black to kill everything. | translate this |
| This is a common seki and best for both. Black wins by three points! | translate this |
| This is a common seki -- Black wins by three points! | translate this |
| Black has no ko threats. | translate this |
| This is a seki (White can't start a ko at A1), but since Black wins by four points, White lost a point here (answering A2 with A3 is better). | translate this |
| This is a common seki - -Black wins by three points! (Answering B3 at A3 is one point better). | translate this |
| Also a common seki, but since Black wins by four points here, White should answer A2 at A3. | translate this |
| Black can't fight this ko. | translate this |
| This is a common seki. Black wins by three points. | translate this |
| Seki! (White can't start a ko at A1). | translate this |
| Seki! | translate this |
| Can Black do anything to avoid defeat? | translate this |
| Ko's are good for White. | translate this |
| This is not optimal. White has no fear of a flower-viewing ko here compared to the correct solution. | translate this |
| Assume ko's are good for White. | translate this |
| Jigo. Black D7 is wrong. | translate this |
| Jigo. Black E1 is wrong. | translate this |
| Now C7 is not possible (White E7 took away a liberty), so Black collapses. | translate this |
| So after D7, Black is alive, but there is the problem of White E7 after Black D8! | translate this |
| (Alternative defense suggested by uwe001.) | translate this |
| Right. | translate this |
| White wins by two points! | translate this |
| No komi, no prisoners. White to play and win! | translate this |
| Black wins by one point! Thanks to the marked stone, the White endgame at the right was gote: if Black starts with A instead (also a common idea), White would be able to play G4 in sente (see that path for more details). | translate this |
| This is only a jigo! | translate this |
| This is a disaster for Black: White wins by one point! | translate this |
| This is a two point loss for Black! | translate this |
| Black can't hope to win this ko. | translate this |
| White takes the upper corner comfortably and keeps sente. | translate this |
| Oh no! White loses sente and half the corner. | translate this |
| Wrong direction: A would have been bigger. | translate this |
| No, White is being too greedy when playing White 5 after White 1, Black 2, White 3, and Black 4. This is enough for White to win on the 9x9 board, but you should have seen a better move. | translate this |
| Though Black lives in the upper left corner, White takes the entire lower edge. | translate this |
| No! White will barely have a chance to kill the lower group. | translate this |
| Black is cut in two and barely lives with either group. | translate this |
| No, White is being too greedy when playing A. Black can minimize her loss. This is enough for White to win on the 9x9 board, but you should have seen a better move. | translate this |
| Ok, I know this ends in a variation which I called 'solved' elsewhere. But here: why didn't you seize the opportunity to cut Black to pieces by capturing A? | translate this |
| As you can see, Black's hane at A does not even threaten to make an eye in the corner. | translate this |
| No choice. | translate this |
| White either kills the upper left corner or cuts Black in two. | translate this |
| To cut was the right idea, but Black can minimize the loss. On a 9x9 board this might be just about enough for White, but on a bigger board Black could exploit her thickness. You should have seen a better move. | translate this |
| No. Black wins comfortably. | translate this |
| Black has played the hane at A. What is White's strongest response? White can win by more than two points. | translate this |
| Good, but playing at A might be slightly better (there might be some bad aji left at B). | translate this |
| It's ok, but the last stone is usually played at A or B (as it removes bad aji from C). | translate this |
| No need to push further. | translate this |
| This is rather catastrophic for Black. You could have avoided this. | translate this |
| You could have avoided this. | translate this |
| You can do better than this. | translate this |
| White has just played at the marked stone. What is the correct response? (Think late endgame/yose -- Black is trying to seal off the lower left side.) | translate this |
| Black A or B saves the marked stones, but White's gain on the edge is good enough. | translate this |
| No. Black saves the marked stone, and White has to struggle to make a living for the surrounded group. | translate this |
| No. White cannot save the marked stones. | translate this |
| No. White is deadder than Black. | translate this |
| No. White loses the marked group. | translate this |
| Right or wrong? I don't know. Add a comment! White has to be careful about the snapback-set-up at A. | translate this |
| No. Black can escape with either A or B while White's stones are in deep trouble. | translate this |
| Black after being cut at AABB attempted a countercut at C. What is White's best answer? | translate this |
| Ko - there is better. | translate this |
| 2 eyes: alive. | translate this |
| Black wins by four points! | translate this |
| This is only a jigo - Black missed D2! | translate this |
| Black wins big! | translate this |
| This is only a jigo - sacrificing a stone was bad! | translate this |
| This is only a jigo - sacrificing a stone was wrong. | translate this |
| WHITE wins by one point?! Sacrificing a stone was wrong, and Black also missed the sente play D2. | translate this |
| Black has no more ko threats. | translate this |
| This is hopeless for Black. | translate this |
| This is only a jigo, but Black had no choice - after playing D2, he must sacrifice a stone at G4. | translate this |
| This would be ok for Black, but White F9 was a mistake - G4 is better. | translate this |
| Good enough for White - he can also fight the ko. | translate this |
| White lives, Black is dead. | translate this |
| There is always a second White eye at the bottom. | translate this |
| Ko. Black needs 2 approach moves (presuming White fills R18 after answering Black's first threat). | translate this |
| White to kill the two Black stones in the corner without any hint of ko. | translate this |
| White cannot get another eye inside. | translate this |
| Help Hikaru kill the marked stones. | translate this |
| White has 18 points + 10 prisoners, Black has 19 points + 10 prisoners. Black wins by 1! | translate this |
| Black wins by one point. | translate this |
| White just plays a dame move, he has no more ko threats. | translate this |
| White has 10 points + 1 prisoner, Black has 12 points + 3 prisoners. Black wins by 4. | translate this |
| White has 11 points + 1 prisoner, Black has 10 points + 1 prisoner, White wins by 1! | translate this |
| This is not a threat! White wins by 2 points. | translate this |
| White has 12 points + 3 prisoners, Black has 10 points + 2 prisoners. White wins by 3. | translate this |
| White has 17 points + 8 prisoners, Black has 20 points + 9 prisoners. Black wins by 4. | translate this |
| White has 10 points + 1 prisoner, Black has 13 points + 4 prisoners. Black wins by 6. | translate this |
| In case White eliminates Black's ko threat... | translate this |
| White has 10 points of territory, no prisoners. Black has 9 points of territory, no prisoners. White wins by one point. | translate this |
| Black to play and win the game. There's no komi and no prisoners. | translate this |
| Seki. White scores 1 point for capturing C3 and another 1 point when she removes A5. | translate this |
| 1 point worse than the optimal seki (although sente). | translate this |
| Sente but 1 point worse than the optimal seki. | translate this |
| Seki, but Black has sacrificed unnecessarily. | translate this |
| Seki, but Black has given White unnecessary prisoners. | translate this |
| Seki, but Black has sacrificed more stones than he needed to. | translate this |
| 1 point worse than the optimal seki (but sente). | translate this |
| Best endgame for Black considering only points (not sente)? | translate this |
| This is okay for White, but Black made a mistake. | translate this |
| This is bad! | translate this |
| This is hopeless. White can play either F2 or E7. | translate this |
| Black should have played at the bottom. | translate this |
| White escapes via ko. | translate this |
| White captures two Black stones and lives. | translate this |
| The best Black can do is ko. | translate this |
| White escaped. While Black may still kill White, depending on the rest of the board, Black can do better. | translate this |
| See variation on C16. | translate this |
| See variation on D17. | translate this |
| Escape via ko. | translate this |
| See variation on D15. | translate this |
| See variation on B17. | translate this |
| This is fun problem I encountered when I started learning go. It demonstrates a commonly used principle. | translate this |
| White wins! | translate this |
| White wins with damezumari! | translate this |
| Black takes a vital point and makes ko. | translate this |
| Best ko for White, but she can do better. | translate this |
| White wins, but Black can play better. | translate this |
| Best ko for White, but she can play better. | translate this |
| White to live without ko. | translate this |
| Black has more liberties. | translate this |
| The third seki (Black can't play B2 because of White A4 or White B4) - and a jigo! | translate this |
| Black wins by one point! There was no need to sacrifice a stone. | translate this |
| Black wins by 1 point! There was no need to sarifice a stone... | translate this |
| Black wins by five points! | translate this |
| This is also a jigo. | translate this |
| Black wins by one point! There was no need to sacrifice a stone... | translate this |
| Black is dead - there is no time for Black F1. | translate this |
| Uh-oh... ATARI! | translate this |
| This is a 6 point loss for White. | translate this |
| Black wins by two points! | translate this |
| The joseki sequence leading to this position is shown. | translate this |
| This is joseki, but White G5 is more usual. The joseki sequence leading to this position is shown. | translate this |
| One color go: White to move. Hint: the next move is the last step to a standard joseki. | translate this |
| White gets a gote seki. | translate this |
| One point in gote satisfies you? I hope you aren't this timid with girls! | translate this |
| Ooh -- two points in sente -- unless you prefer to play A3 for a third in gote? You can do better! | translate this |
| White to play. Assume White wins ko's. Stylized from a complicated full-board position. | translate this |
| Killing White J10 saves Black's center dragon. Though White can save his J14 stones with N18, victory should be certain for Black. | translate this |
| Though Black has caught the White stones at J10, the marked stone should be at A, as White B is now sente. Still, Black should win. | translate this |
| Though the marked stone catches the White J10 group, there is no reason to allow White to connect at B in sente. The marked stone should simply play at A. | translate this |
| Good start. Did you read both variations? | translate this |
| A and B are ways Black can catch White's J14 or J10 groups. | translate this |
| Black can kill either the J10 stones or J14 stones with A or B. | translate this |
| A and B are Black's miai to kill White J14 or J10 groups. | translate this |
| Black K15 is no good, as it allows White to fix all his problems with L14. Black has a gote eye at A and another gote eye at the sequence starting with B. If Black takes one, White deprives the other. | translate this |
| Good start. Did you read this line? | translate this |
| While it is true that Black has eyes at A and B, they are both gote. When Black plays one, White can simply poke the other out. | translate this |
| Black to play and win. | translate this |
| Jigo! (In this position it doesn't matter, but normally it's better to play G3 first, then F3.) | translate this |
| Jigo! (Of course, there was no need to 'sacrifice' a stone.) | translate this |
| Black wins by three points! | translate this |
| The original plan fails. White takes the left side but will lose the L6 / N7 group (L13 can survive). | translate this |
| Black has no strong attack on the center stones since they easily connect to the top. | translate this |
| This would be fine if Black could strongly attack the center stones with his sente, but they easily connect out to the top. | translate this |
| What should Black do about the marked stones? | translate this |
| I like this seki :) | translate this |
| This is a jigo, too, but White will have to sacrifice three more stones, with a jigo as result. | translate this |
| Also a seki - and a jigo, since Black will capture three White stones in the upper left. | translate this |
| This is a seki, too, but Black can capture three more stones in the lower left, making it a jigo. | translate this |
| This is a seki, too, but White will have to sacrifice three more stones in the upper left, making the game a jigo. | translate this |
| No komi, no prisoners - White to play and win! | translate this |
| H9 makes both ladders. | translate this |
| Black connects under or kills P18 stones. | translate this |
| Black kills the G18 stones. | translate this |
| Black kills the P18 stones. | translate this |
| P18 dies. | translate this |
| Black connects underneath. | translate this |
| G18 dies. | translate this |
| White to kill the L18 stones. | translate this |
| L14 breaks this ladder as well as the other three ladders Black can start! | translate this |
| The ladder works for Black... | translate this |
| White to play - can he capture the marked stones? | translate this |
| White has more captures and wins. | translate this |
| No komi, no prisoners: Black to draw or win. | translate this |
| White to play and draw, no komi. | translate this |
| Jigo. | translate this |
| No komi, no prisoners. | translate this |
| Safe, but Black can do better. | translate this |
| Keeping sente is important! | translate this |
| Huge ko for life. Black can do better. | translate this |
| Ack! | translate this |
| Black lives, but could do much better. | translate this |
| Oh no... | translate this |
| Objective: whatever's clever. | translate this |
| What should Black do? | translate this |
| Black is unable to push at H15 to falsify the eye due to a shortage of liberties. | translate this |
| White can capture the Q16 stones but Black lives. | translate this |
| Please resist the temptation to atari at F16, I haven't included any variations and it's bad style. | translate this |
| Black can't play H15 to falsify the eye due to a shortage of liberties. | translate this |
| White can take the Q16 stones but Black is alive. | translate this |
| Please resist the temptation to play atari at F16. I haven't included any variations and it's bad style. | translate this |
| Black needs to try some trickery now; stay on your toes. | translate this |
| White can capture the Q16 stones but Black is alive. | translate this |
| Black has his second eye at D13 or D15. | translate this |
| White dies in gote - he has half an eye at O14 and another half near H14. | translate this |
| Black lives. NB: he could have killed the whole White group in a capturing race after playing Q16 instead of H18, but this refutation is simpler. | translate this |
| White dies in gote - there is half an eye at O14 and another half eye near H14. | translate this |
| Black lives - note Black could have killed the whole White group in a capturing race by playing Q16 instead of H18, but this refutation is simpler. | translate this |
| White dies - there is half an eye at O14 and another half eye near H14. | translate this |
| Black has a second eye at D13 or D15. | translate this |
| Please see variations where White plays at H15 in response to Black H16 for how this fails. | translate this |
| Please see variations where White responds to H16 at G16 for how this fails. | translate this |
| White only catches half of Black's group. | translate this |
| White to kill the dragon completely. Hint: White starts with a thick defensive move on the left. | translate this |
| Black has already lost too much. He can do better. | translate this |
| White just played at 1. What is Black's best option? | translate this |
| Black wins by one glorious point. | translate this |
| Black makes a second eye (L9) or connects out (M7). | translate this |
| Please stop Black from playing atari by playing at A. | translate this |
| An all-dominating ko; Black will ignore any threat. | translate this |
| Ko. Black will play A3 if White connects. | translate this |
| Black is alive (B8 or K10 next). | translate this |
| Please choose between A, B, C, D, E and F. | translate this |
| Black has sente and has 3 places where he can make eyes in gote (N12, B8 and in the center - see variations). | translate this |
| The extra gote eye on the right is sufficient for Black to live; please compare to the correct path. | translate this |
| The sente eye on the right (White must also prevent connection to the corner) means Black lives easily; please compare to the correct path. | translate this |
| White doesn't have time to throw in. | translate this |
| Black is connected to the corner. | translate this |
| Black can connect to the corner or play S13. | translate this |
| The gote eye on the right is sufficient for Black to live; please compare to the correct path. | translate this |
| Black lives easily after getting an eye in sente; please compare to the correct path. | translate this |
| White is dead in the center. | translate this |
| The stones in the lower left were in no immediate danger, please see the correct path for how White can deflect Black's attack here. | translate this |
| White dies in the center. | translate this |
| White was in no immediate danger in the upper left. | translate this |
| Both sides are cut but it is Black who wins. G12 is not urgent since the White groups it connects are both strong (although there is aji at the top if Black gets G12). | translate this |
| Kill all the marked stones. Hint: White has a cutting point near the center that needs urgent defense: which connection to choose? | translate this |
| With this, the ko fight ends in a seki and the game is a jigo. | translate this |
| White wins by one point! Black should accept the seki... | translate this |
| White has no ko threat left. | translate this |
| In this variation, Black will lose! | translate this |
| This is awful for White. | translate this |
| Again, there is no White ko threat. | translate this |
| White has no ko threats left. | translate this |
| Seki. White wins by one point. | translate this |
| White wins by four points. | translate this |
| White's attempt comes to naught. | translate this |
| White wins by two points! Black D7 was wrong... | translate this |
| This is hopeless. | translate this |
| Black wins the ko and the game! | translate this |
| White has no ko threat. Black wins the ko and the game. | translate this |
| This is a seki, and, since Black can capture a stone at F7, also a jigo, so White is satisfied; but instead of playing G6, Black can do better! | translate this |
| White can't play this way! | translate this |
| Black lives by damezumari. | translate this |
| White crushes Black. | translate this |
| Draw. | translate this |
| Okay, but you should play at A. | translate this |
| An unexpected life and death problem occurs when White plays the marked stone. Black to live. (Please avoid playing at places like A and B as I did not provide any variations for them.) | translate this |
| White can't play this ko. | translate this |
| This is an easy win for White. | translate this |
| Shortage of liberties! | translate this |
| Definitely not the best way for Black because it allows White a possibility of fighting a ko. | translate this |
| What can Black do inside White's territory? | translate this |
| White to escape doom and seal the win in one move. | translate this |
| Though usually White will choose a solid connection. | translate this |
| Black starts to feel a little smothered... | translate this |
| Exchanging C3 for B3 does not help the White position. | translate this |
| Black is too happy with this result. | translate this |
| Best local result for White? Exploit Black's weakness. | translate this |
| Black has K15 or K12. | translate this |
| White has no ko-threat - he loses the race if he tries A2 or A6 as a threat. | translate this |
| White wins by one move thanks to A13, H12 and K10. | translate this |
| Black should get a seki from this ko. | translate this |
| Seki - the ko needs too many approach moves. | translate this |
| White dies by one move. | translate this |
| Ineffective threat. | translate this |
| White has no ko-threat; try one. | translate this |
| White needs to save the K9 group, save the G11 group and prevent a Black connection to the top - this isn't possible. | translate this |
| White has no effective ko-threats. Black wins the race if White plays A2 or A6 as a threat, T17/T18/D17 are all too small, M15 is ineffective, and Black's group in the lower right is too strong. | translate this |
| Seki, since Black is unlikely to fight the ko. | translate this |
| Seki - there are too many approach moves to fight the ko. | translate this |
| Seki - Black is unlikely to fight the ko. | translate this |
| Black hits the key point at A. How does White unconditionally kill the triangled stones? | translate this |
| Black firmly takes the corner. | translate this |
| This is better played at A. Black has no weakness. | translate this |
| This ko is an unnecessary burden for Black. | translate this |
| Black helps White get shape. | translate this |
| White gets good shape in the corner. Black can do better. | translate this |
| White rejoices in your foolishness. | translate this |
| Unimpressive. | translate this |
| This is not a tesuji. | translate this |
| Going nowhere. | translate this |
| White has a swell position. | translate this |
| Black to get the best local result. | translate this |
| Since Black's D6 is too high, it becomes a target for White. White succeeds! | translate this |
| Black secured the left side. White failed. | translate this |
| Black's C5 is joseki if it was played instead of C2. White's D2 not only fails to punish Black, it allows Black to make up for his mistake while gaining the benefit of C2. White fails. | translate this |
| Black fixes his shape, and White's shape is inefficient. White fails. | translate this |
| Black 1 is overplayed; he should have pulled back at A instead. How should White punish Black? | translate this |
| Uh oh... White A6 and White A4 are both impossible, so White failed. White B4 was a mistake! | translate this |
| Black has three liberties now, so he is safe. | translate this |
| The Black stones on the left are alive in seki, so White would have to kill the Black group at the top. A or B are the only moves he can try, but most probably it is White who will die... | translate this |
| No - in this variation, Black is safe! | translate this |
| Isn't this the same ladder as in the solution? | translate this |
| An important move, as you will see later. | translate this |
| White to capture the marked stones - should he chase them out with A or shut them in with White B, Black A, White C? | translate this |
| Black captures a big corner. | translate this |
| Better at C18. | translate this |
| White 1 is the so called 'big net'. | translate this |
| White 1 is the so called 'big net'. This is the best result for both sides. White gains sente because of A and B, while Black can choose to attack White's 2 stones outside. | translate this |
| White can do much better. | translate this |
| White's eye shape is uncertain. White fails. | translate this |
| White's 2 stones will face a tough battle. | translate this |
| White 1 is the familiar net play. However... | translate this |
| Black forced White's false eye. White fails. | translate this |
| A and B are miai for Black. White fails. | translate this |
| White's bad aji at A forces her into gote. | translate this |
| White just helped Black to strengthen her shape. | translate this |
| Black not only loses sente, but he has to fight the ko at A too. If Black connects at B, White can go C or D. White succeeds. | translate this |
| This is sente for White because of A. | translate this |
| Although White seems to retain sente, this is not so. Rather, White has helped Black to strengthen his territory at the corner instead. What was supposedly White's sente at A has become diminished because of Black's sente at B. | translate this |
| The Black group connects. White fails. | translate this |
| White loses sente. | translate this |
| Black's 3 stones are captured. | translate this |
| White is short one liberty. | translate this |
| White to save her 6 stones. | translate this |
| White breaks free. | translate this |
| Black captures one stone, but the other one is still cutting Black in two. | translate this |
| This stone is escaping. | translate this |
| Black captured one stone, but the other one escapes. | translate this |
| Yes, Black captures one White stone, but White's key stone still cuts Black in two. | translate this |
| Interesting squeeze, but the Black stones are caught. | translate this |
| Black is cut by White's stone. Connect Black's two groups. | translate this |
| Ko is good for Black here. Black effectively takes first as after White T1, Black T3. | translate this |
| You just used up a possible ko threat for no reason. | translate this |
| Almost right, but this ko is not optimal. | translate this |
| You just used up a ko threat you may want later. | translate this |
| Close, but not the best ko. | translate this |
| Not the best ko. | translate this |
| White can give up that end bit. | translate this |
| Adum needs a good move to attack fabrosen's corner. I'm going to be quite particular about getting the best result, so choose wisely. | translate this |
| Black's 2 stones outside become real threats to both White's groups. | translate this |
| Although Black gains in territory with A, White's group is settled for the moment. Black can do better to impose more pressure on White. | translate this |
| White's stones are split up with bad aji everywhere. | translate this |
| Black 1 hits White's vital point, but... | translate this |
| How should Black best attack White's group? Assume ladders are good for Black. | translate this |
| Black has connected, but not in the most profitable way. | translate this |
| Ko with E19 is all that remains for Black. | translate this |
| Right. Now the White group has only one eye and so it is dead. | translate this |
| Make 2 eyes and save your group. | translate this |
| White wins the ko and the game. | translate this |
| White wins by two points. | translate this |
| D6 first is important! | translate this |
| Black to escape. | translate this |
| White cannot connect at A, because Black with B will capture at either C or D. But Black A not only connects his groups, it also threatens double-atari at C and D. White must spend a move (lost sente) to protect her four stones or give 8 points to Black. | translate this |
| Black connects. However, there is a better solution that can give Black more benefits. | translate this |
| Black has at most one eye. Black fails. | translate this |
| Black 1 is a good try. However... | translate this |
| Black connects. However, there is a better solution that can give Black more benefits. The Chinese text mentioned that this is variation is the strongest response White can give against Black 1. This is the text (translated) quote, 'Although Black connects, White 2 and 4 have gained benefit.' I am not sure how White 2 and 4 have gained benefit. | translate this |
| Black can make at most one eye. | translate this |
| Black to save his 4 stones. | translate this |
| Black saves the stones and some territory as well. | translate this |
| It's terrible for Black: his group is dead! | translate this |
| Black is losing too much territory! | translate this |
| Black cannot save all his stones! | translate this |
| Black cannot save all his stones. | translate this |
| Black is losing too much territory. | translate this |
| White just played the marked stone. What is the best way to defend? | translate this |
| Good escape sequence: Black gets some influence on the outside and the White marked stones are in trouble. | translate this |
| White is too strong on the outside! | translate this |
| White is too strong on the outside and builds a big wall on the right! | translate this |
| Black to make his group escape in the best way. | translate this |
| Black showed little imagination. White wins by five points! | translate this |
| White wins by six points. Black should have tried a little harder! | translate this |
| Not a chance! | translate this |
| Difficult ko. Black can do better. | translate this |
| White's secret weapon. | translate this |
| Temporary seki, but Black is doomed. | translate this |
| Black can't afford to let White capture! | translate this |
| Seki inside, but Black dies on the outside. | translate this |
| Black can't afford to lose these stones! | translate this |
| White can live unconditionally. | translate this |
| White could have lived unconditionally. | translate this |
| There's no eye on the left. | translate this |
| Black A is pointless because of White B. | translate this |
| White 1 has lost its purpose. White fails. | translate this |
| White has to win 2 ko's at A and B. | translate this |
| White cannot live because A and B are miai for Black. | translate this |
| White can only live by ko on top. Even if she lives there, Black A would severely threaten White's group on the right. It is better to try to connect the two weak groups. | translate this |
| White to connect her groups without ko. | translate this |
| Oops! White wins. | translate this |
| White wins. Black can make only one eye. | translate this |
| Black is alive (good)! You have made 9 points (including the J line). You can make more points playing some tenukis. Maximum score to beat is 10! | translate this |
| Too submissive (you are strong). | translate this |
| Yes: you have made 10 points (including on the J line)! | translate this |
| Too submissive. You are strong! | translate this |
| You have 5 points (including on the J line). Score to beat is 10. | translate this |
| You have 4 points (including J line). You have sente and you will play tenuki. The score to beat is 10. | translate this |
| You have 4 points (including J line). The score to beat is 10. | translate this |
| The Black group is dead. Terrible for Black! | translate this |
| White just played the marked stone. Black to maximum his score! You can play tenuki's: each tenuki gives you 3 points. Please play your first tenuki at A, second one at B, then C. | translate this |
| White does not have two eyes. | translate this |
| White can only make one eye. | translate this |
| Can you trap the marked stones inside a geta (net)? Please show me how. | translate this |
| White will capture the Black stones! | translate this |
| The four Black stones are lost! | translate this |
| Black just played 1. Please refute. | translate this |
| White wins. (Any ko threat costs 1 point.) | translate this |
| This may work, but G9 is such a bad move that it cannot be included in any correct answer. | translate this |
| White collapses. | translate this |
| White wins. (White will win the ko at the marked stone, E1.) | translate this |
| This may work, but G9 is VERY BAD and cannot be included in any correct answer. | translate this |
| Too big. | translate this |
| Black cannot do anything. | translate this |
| No komi, no prisoners. Black to play and win. | translate this |
| Black got jacked. No ko threats. | translate this |
| No ko threats. | translate this |
| White cannot approach. | translate this |
| DESTROYED! No ko threats. | translate this |
| White: 'G2' Black: 'You've sunk my battleship!' No ko threats. | translate this |
| Black to play and capture the marked stone! | translate this |
| Gote seki. You missed the bonus point. | translate this |
| Ten thousand year ko. Since neither side has threats nobody plays D19 or D18. Black cannot connect the ko. In the end of the game White takes the ko and connects it, having a gote seki with one bonus point (the captured stone). | translate this |
| Sente seki - Black should have triangled instead of squared to avoid this, but this way he avoids the one thousand years ko problem, trading (in this case) a move for a point. | translate this |
| Black is alive with 8 points. | translate this |
| Well, this move is illegal. Remember the ko rule? | translate this |
| Now you can try different approaches in the actual problem. | translate this |
| Incorrect. The right moves are shown after you select the correct answer. | translate this |
| How many ways to kill without ko? Select the number. | translate this |
| The ways to kill are A, B, and C. | translate this |
| As usual, Go saves the day. Those of you who sent the ladder in the other direction (marked) shouldn't be too surprised that this leads only to problems... | translate this |
| Black A was careless! | translate this |
| Problems cause problems... | translate this |
| And a last 'A or B': The marked stone should help you with your decision...?! | translate this |
| The turning point. A will send the ladder to the bottom, B to the top. Only one move works! | translate this |
| Again, A or B? If you haven't read a little further ahead on your own, please play A, things will be clearer that way. | translate this |
| A or B? Please choose carefully! | translate this |
| How can Black save the marked stones? | translate this |
| Bent four. | translate this |
| This exchange doesn't help White, though you can still live. | translate this |
| A and B are miai, so Black is dead! | translate this |
| This is worst for Black - White wins by one point! | translate this |
| This isn't good enough for White - Black wins by one point! | translate this |
| White played badly - this is a two point win for Black! | translate this |
| White dies first. | translate this |
| You could have killed White unconditionally. Now White may live by playing at A, ignoring your ko threat. | translate this |
| If you are searching for a ko threat, play at A. | translate this |
| Black to move and kill White. | translate this |
| Easy ladder. | translate this |
| Hard to catch them now. | translate this |
| James wants to capture poor adum's marked stones... | translate this |
| White doesn't even have to play another move. Black has only one eye (at C1). B2 is a false eye. | translate this |
| White doesn't even need to play another move. Black has only one eye (at B2). A1 is a false eye. | translate this |
| You killed White! | translate this |
| Black kills White by double ko! | translate this |
| Double ko, White dies. | translate this |
| Black loses big. | translate this |
| White connects the ko and gets a seki. | translate this |
| White connects the ko; seki. | translate this |
| Whoops. | translate this |
| Seki! (If Black tries to kill White, he will fail.) | translate this |
| You got killed! | translate this |
| You let White live! (You can live through F1.) | translate this |
| How can you kill White? Use A and B as passes. | translate this |
| Black dies: rabbity six. | translate this |
| Now you can play and try. | translate this |
| Wrong number. After you get the right number, you can play with each pattern. | translate this |
| Click on the number that corresponds to how many of these groups you can kill with a first move as White. | translate this |
| Uh-oh... White C1 was careless! | translate this |
| White wins by one point! Black E7 was a mistake! | translate this |
| Black can't play this way! | translate this |
| White enjoyed himself with a string of sente moves, but in the end he has a lost game - Black wins by one point! | translate this |
| Black can't tenuki at the top! | translate this |
| Black wins by six (!) points - White C1 was very small. | translate this |
| Black wins by five (!) points. White G4 was too harmless. | translate this |
| The White group at the bottom is safe for now. | translate this |
| White is caught short of liberties. | translate this |
| White must protect the double peep. | translate this |
| White must protect the double peep. L1 only allows White to get the Black G11 stones when they have no other escape route. | translate this |
| Please choose from a to f. | translate this |
| Ko. Black takes first. (Black has large threats at L1, B2, M2 or L1, C3, M2.) | translate this |
| Ko. Black takes first. | translate this |
| Black catches some stones and the lower group dies. | translate this |
| Black catches some stones. | translate this |
| Black catches some stones and kills the lower group. | translate this |
| If you think White is safe at the bottom choose from D, E and F -- otherwise play A, B or C. | translate this |
| Close, but White will not have time to protect against both Black A and B. Compare with part 3 for how Black can do better than ko after B now. | translate this |
| Black isn't fooled into playing C3. | translate this |
| Black doesn't fall into the trap at C3. | translate this |
| Black sees the danger of playing C3. | translate this |
| Choose from C, D and E if you think White is already safe on the lower side or pick the better of the moves A and B otherwise. | translate this |
| Close, but White will need to protect at both A and B. See part 2 to see why more clearly. | translate this |
| White has left too many weaknesses behind. | translate this |
| Is A or B better shape? | translate this |
| Black has the squeeze at a or wins the capturing race at b. | translate this |
| This only adds another 4 stones to the prisoner pile. | translate this |
| Black wins here. | translate this |
| Black will win. | translate this |
| 4 extra prisoners for Black. | translate this |
| Black wins the capturing race and kills the right side unconditionally. He could also have fought the ko at E7. | translate this |
| Black wins the capturing race against the Q6 stones. | translate this |
| Black wins the capturing race against the Q6 stones. | translate this |
| White can't defend a and b. | translate this |
| White must save the N3 and Q6 groups. | translate this |
| White's Q6 group is safe for now. | translate this |
| White's Q6 group is out of immediate danger. | translate this |
| White will take a big loss. | translate this |
| Ko. Black takes first and he has the move at S8 which acts as a threat. | translate this |
| White will lose the M3 group. | translate this |
| Ko. Black takes first and the move at S8 acts as a local threat. | translate this |
| White loses the M5 and M3 groups. | translate this |
| Three White groups die. | translate this |
| Three White groups die including M3. | translate this |
| White needs to keep the N3 and Q6 groups safe. Black has continued from part 1 with the marked stone. | translate this |
| You have saved all White's groups. | translate this |
| You have saved all White's groups although the sacrifice at T18 was not needed (S19 good enough). | translate this |
| White is heading for a big loss by setting up the ko. Black has very large threats at A12 and Q13 (and other loss making threats which would still be profitable overall). | translate this |
| You have saved all White's groups (although using a lot of unnecessary sacrifices at the end). | translate this |
| You have saved all White's groups (although the sacrifice at T17 was unnecessary). | translate this |
| You have saved all White's groups (although the sacrifice at T18 was unnecessary). | translate this |
| This threat is much bigger than the ko which is also enormous but White has no ko threat to follow which doesn't incur an equally big loss. | translate this |
| White is heading for a big loss by setting up the ko. Black has a very large threat Q13 (and other loss making threats which would still be profitable overall). | translate this |
| Black can play the 1000 year ko thanks to the threat at Q13. | translate this |
| White must avoid the 1000 year ko due to Black's ko threat at Q13. | translate this |
| You have saved all White's groups (although the sacrifices in the top right were unnecessary). | translate this |
| Black has the large threat at Q13 with which to win the 1000 year ko. | translate this |
| Black has the large threat at Q13 with which to play the 1000 year ko. | translate this |
| This threat is even larger than the ko. | translate this |
| Please defend at R18 if and when you think the top left is played out. | translate this |
| Ko. Black takes first. (If White exchanges H18 for F13, the M3 group is dead.) | translate this |
| Ko. Black takes first. (D16 acts as a local threat for Black.) | translate this |
| Ko. Black takes first. (If White connects at F13, Black plays atari at L19.) | translate this |
| Ko. Black takes first. (If White connects at F13, Black plays atari at L19.) B13 acts as a local threat for Black. | translate this |
| Ko. Black takes first. (If White connects at C11, Black plays atari at L19.) | translate this |
| White will be unable to connect after Black L19. | translate this |
| Ko. Black takes first. (B13 acts as a local Black threat). | translate this |
| Connect at a or b? | translate this |
| Connect at a or steal the eye at b? | translate this |
| Black captures some stones. | translate this |
| The M3 stones die. | translate this |
| Black has continued from part 2 with the marked stone. White to ensure the continuing safety of the M3 and Q6 groups. | translate this |
| Black dies in the corner, and White gets a live shape. | translate this |
| Deado. | translate this |
| Alive, but White has lost points unnecessarily. | translate this |
| Alive, but White has lost points for no compelling reason. | translate this |
| How to answer Black 1? | translate this |
| :) You found it! | translate this |
| White lives big :) | translate this |
| You found it. | translate this |
| White wins big! | translate this |
| Uh-oh... | translate this |
| This was the wrong move order - White has no ko threat. | translate this |
| White to play and live! | translate this |
| Black eats the five White stones and gets the huge corner. | translate this |
| Does this ladder really work? | translate this |
| No way jose. | translate this |
| Black wedged at 1, White responded at 2. How to catch either these five White stones (and save the Black corner) or capture the stones in the ladder in the upper-left? | translate this |
| And Black connects the ko: jigo! | translate this |
| White connects the ko and wins by one point. Black took the ko too early! | translate this |
| Uh-oh. | translate this |
| White A is also very interesting - please take a look at it! | translate this |
| After some hectic play, Black wins by one point! | translate this |
| Since Black has one ko threat more than White, White can't win the ko. Ignoring the first threat is best! | translate this |
| This is two points worse than White A. | translate this |
| Black is dead! White A also kills the group. White B in answer to the marked Black stone would have been a mistake, allowing Black to reach the solution with B C. | translate this |
| The group in the bottom right was alive already. | translate this |
| Black G4 was gote! | translate this |
| Black to play and draw! | translate this |
| White L8 should be played at M8. | translate this |
| Black escapes or wins the capturing race in the corner. | translate this |
| Black escapes and White dies in the corner. | translate this |
| White can live, but there are easier ways. | translate this |
| White cannot capture the marked Black stones, so she has failed. | translate this |
| White has only one eye in the corner and cannot get a second one on the right side. | translate this |
| White to play and live. Escaping is also a solution. | translate this |
| B2 was played too early. | translate this |
| Black has no continuation. | translate this |
| Though this is often the key point, here White gets good shape. | translate this |
| The White stones are heavy. | translate this |
| This helps White do what he wants to do anyway. | translate this |
| Good start. How to complete the shape? | translate this |
| Not bad, but White's shape is better than it could be. | translate this |
| Black captured in a ladder. Terrible for Black. | translate this |
| How can Black best attack the shape of the marked White stones? | translate this |
| White to play and win. No prisoners, no komi. | translate this |
| Very well. Black can't play at B1 (1) now, so White is alive. | translate this |
| Taking White B1 back is right, but only if you 'uncapture' (as the chess problemists named this) two Black stones at A1 and C1. That gives the position in the top left. Now, please play there to live! | translate this |
| White to take his last move back (choose the corresponding point on the right), and play and live instead! | translate this |
| This ladder does not work. | translate this |
| Black cannot approach the White stones so he is captured. | translate this |
| Black to capture the marked stones. | translate this |
| Black can't win this ko. | translate this |
| Black can't play this ko. | translate this |
| Making an eye is correct - now White can't prevent A. | translate this |
| A one point loss - at least. | translate this |
| Black will lose aaaalllll his stones... | translate this |
| With an eye, Black wins easily. | translate this |
| This is only a seki! | translate this |
| With an eye, Black has an easy win. | translate this |
| 'Go Probs'. | translate this |
| White has started a ladder to catch the marked stones, can you make it work? | translate this |
| Death. | translate this |
| White lost too much. | translate this |
| No need to lose those 5 stones. | translate this |
| Ko for survival. | translate this |
| White saves all, but Black limits White to only two points of territory. B19 is worth 2 points in gote for either side. | translate this |
| Not ideal, but makes up for most of the lost stones. | translate this |
| Lives but lost an opportunity. | translate this |
| Good, but not quite! | translate this |
| This is actually a mistake by Black. | translate this |
| White has no chance now. | translate this |
| Nowhere to run to, baby. | translate this |
| How to respond to the triangled stone? | translate this |
| Great job! Black can now play S3 later and White looks like he's in trouble! | translate this |
| Great! Black now lives. | translate this |
| White 1 was pointless. | translate this |
| White 4 was a mistake. How should Black play? | translate this |
| Great! White now has sente and can play A, B or C. | translate this |
| In the previous problem White played 1. This was a mistake. Where should he have played? | translate this |
| Please convince yourself A or B is forced and play at A. | translate this |
| Please convince yourself A is forced. | translate this |
| A is forced. | translate this |
| Please follow A to reach seki. Other lines of play are at best seki, too. | translate this |
| Now the best Black can do is seki. | translate this |
| Black has no ko threat. | translate this |
| Black collapses. | translate this |
| Now Black collapses. Follow A or B to see why. | translate this |
| The best Black can do is A. | translate this |
| Now the best Black can do is seki. Please follow A. | translate this |
| Black has two eyes but his groups on the right can't connect to the eyes. | translate this |
| A is forced. If White got to play A, Black loses. | translate this |
| Now the best Black can do is seki. Use the navigator to see how to reach seki in other variations. | translate this |
| White has one true eye and Black has several false eyes. But if Black can connect his false eyes in a loop, then Black can kill White. | translate this |
| This jigo is best for Black! Black C1 instead of Black B4 would have been a mistake. | translate this |
| White wins big. | translate this |
| Black is lost! | translate this |
| White lives, Black lives not. | translate this |
| Black to play - what's the best he can do?! | translate this |
| Black gets at least a seki. | translate this |
| Not too smart there. | translate this |
| Black gets 2 eyes. | translate this |
| Black manages to squeeze out a ko. | translate this |
| Black is happy with ko. | translate this |
| This is ko, but you can kill Black without ko. | translate this |
| Black gets three eyes. | translate this |
| Black gets the vital point. This follows the 'Play at the point of symmetry' proverb. | translate this |
| Ko makes Black happy. | translate this |
| Black squeezes out a ko. | translate this |
| Black is happy to get this ko. | translate this |
| Now White has been able to play at A4 in sente. | translate this |
| Now White has been able to play A4 in sente. | translate this |
| Black wins by one point - 4 prisoners against 3. | translate this |
| White D2 is a variation. | translate this |
| Black wins by one point - 3 prisoners against 2. | translate this |
| Black to play - what's the best he can do? | translate this |
| White to live happily ever after. | translate this |
| White wins by one point! Sad as it is, this is the best result for Black... | translate this |
| White has enough space to live. | translate this |
| White cannot defend both A and B. | translate this |
| Kill without ko. | translate this |
| Black wins by one point! Black D3 instead of Black C4 is also good, but Black B4 would have been a mistake. | translate this |
| Black wins by one point - 3 prisoners against 2. Black C4 instead of Black D3 would also have been okay, and easier, but starting with Black B4 doesn't work. | translate this |
| 3 prisoners each, so it's a jigo! This isn't good enough - Black C4 and Black D3 instead of Black B4 both win by one point. | translate this |
| Seki and jigo! | translate this |
| A nice position, but a loss for White :) | translate this |
| White to play. What's his best result? | translate this |
| A snapback - White wins. | translate this |
| White C3 doesn't work. | translate this |
| Seki! White wins by four points - 6 prisoners against 2. | translate this |
| This is not best for White because he will have to sacrifice a stone at B1 or C1, winning by only 3 points. | translate this |
| Seki, 6 prisoners for White, 3 for Black so just 3 points difference. You lost by the komi. | translate this |
| The only move. | translate this |
| Black will not play like this... | translate this |
| Nor this. Black has no threats; the board is not that big after all :) | translate this |
| Nah. | translate this |
| Black D2 would be even worse! | translate this |
| White is one liberty short. | translate this |
| This is symmetric, so any A will kill Black :) | translate this |
| Seki, White wins by two points - 5 prisoners against 3. This is not White's best option! | translate this |
| Seki! White wins by 5 points (6 prisoners against 1), but both players made mistakes up to here. | translate this |
| White to play. What's the best he can do? | translate this |
| Vital point of the 'bulky five'. | translate this |
| Ko - you can do without it. | translate this |
| Seki! White wins by 2 points - 3 prisoners against 1. | translate this |
| Seki! White wins by 1 point, 3 prisoners against 2. This result is 1 point worse than White's best result! | translate this |
| Seki! White wins by 1 point, 3 prisoners against 2. This is 1 point worse than the best result! | translate this |
| Seki! White wins by one point, 3 prisoners against 2. This is one point worse than the best result! | translate this |
| White can't make an eye, so he is dead! | translate this |
| White can't do anything... | translate this |
| Success. | translate this |
| White can't take the liberty at P16 and connect the O15 group. | translate this |
| Atari. | translate this |
| Black dies either way. | translate this |
| This will lead to a ko later which White cannot win. | translate this |
| White is unable to take the liberty at B8. | translate this |
| Black should tenuki but he can't read that far. | translate this |
| How can White save the group in the top left corner and capture some Black stones? | translate this |
| Seki! Black wins by one point - 5 prisoners against 4. | translate this |
| This is a mistake! | translate this |
| White can't play C4, so he is dead. | translate this |
| Seki. Black wins by three points (4 prisoners against 1). | translate this |
| This is only a jigo - seki. | translate this |
| Seki. White wins by one point (4 prisoners against 3). | translate this |
| Jigo. White wins by one point (3 prisoners against 2). | translate this |
| Jigo. White wins by one point (4 prisoners against 3). | translate this |
| Black to play. What's his best result? | translate this |
| Black lives but the throw-in is unnecessary. | translate this |
| If Black A, then White B. | translate this |
| White to capture the two Black stones. | translate this |
| Seki. Black wins by one point. (1 prisoner against 0.) | translate this |
| Seki. White wins by one point. (1 prisoner against 0.) | translate this |
| Seki, and jigo! | translate this |
| Seki. Black wins by two points - 3 prisoners against 1. | translate this |
| Black wins by two points, but White C3 was clearly a mistake. | translate this |
| This gives Black a chance to reach the solution. | translate this |
| White lives. A and B are miai. | translate this |
| Black wins by six points. | translate this |
| Black can live with A or B now, and since he will capture a stone in the process, he will win by one point (compare to the solution). | translate this |
| Black is short of liberties and can't play A3, so he is dead... | translate this |
| Both Black eyes are gote, so there is no need to add another move at the left :) | translate this |
| This is hopeless for White: Black wins by 4 points. | translate this |
| White cannot connect at E1; Black connects unconditionally. | translate this |
| In some circumstances, the move in E1 can be a better end-game move than the move at C1. | translate this |
| Black to play: do your best to save the marked stones. | translate this |
| White K2 guarantees an eye which wins the race. | translate this |
| Black needs an extra approach move at A2 after the throw-in. | translate this |
| H1 results in a snapback so White is dead. | translate this |
| G2 results in a snapback so White is dead. | translate this |
| Both live. | translate this |
| White to kill the Black J3 group. | translate this |
| Black needs an extra approach move after White F2. | translate this |
| White to kill the P3 group. | translate this |
| Seki. The cutting point forces Black to fill his own eye. | translate this |
| Approach ko for Black. | translate this |
| Black lives in the corner. | translate this |
| Ko for Black. | translate this |
| White will lose. | translate this |
| Black kills by one move. | translate this |
| Black is dead due to White's bigger eye. | translate this |
| Black is dead (whether he had played Q2 or not). | translate this |
| Black to kill White's P3 group. | translate this |
| Rabbity-six. | translate this |
| White has eyes in the region of A and B. | translate this |
| White is two moves ahead after starting at T2. | translate this |
| This move doesn't help White to play at L1 effectively. | translate this |
| Black is now ahead. | translate this |
| This move doesn't help White to play L1 effectively. | translate this |
| White can only afford one tenuki because an approach move is needed here. | translate this |
| If you think White can afford a second tenuki then play 'Te2' at M7, else kill Black now. | translate this |
| White is 2 moves ahead after starting at T2 so can afford to tenuki once. If Black wishes to die in gote you should let him. | translate this |
| This move doesn't help White to play at L1. | translate this |
| If you think White can afford to tenuki then play 'Te' at K7, else continue with the execution. | translate this |
| White K1 doesn't help White to play L1 effectively. | translate this |
| White to kill the Black P3 group efficiently. | translate this |
| Ko. White needs an approach move at A, but Black could have killed without ko. | translate this |
| Ko. White needs two more moves at A and B but Black could have won unconditionally. | translate this |
| Ko. Black could have killed unconditionally. | translate this |
| Black wins by eleven points :) | translate this |
| White is lost! | translate this |
| White connects the ko and wins by one point. | translate this |
| Ko since White can't approach at P2. | translate this |
| White P2 is self-atari. | translate this |
| Please avoid forcing at T1/T3. | translate this |
| A good ko for Black. | translate this |
| The larger eye here means Black kills by one move. | translate this |
| Note: White has no need to connect at F3 until it is put into atari (and even then you don't have to connect it) so no such variations are included with White connecting before it becomes atari. | translate this |
| Black wins this easily. | translate this |
| The bigger eye means Black kills by one move. | translate this |
| Black wins easily. | translate this |
| Black dies this way. | translate this |
| White misses a chance here. | translate this |
| A and B are miai for Black to get 2 eyes so White is dead. | translate this |
| White can do no better than lose by one move against the larger Black eye. | translate this |
| White loses easily against the larger Black eye. | translate this |
| Black has eyes at A and B, since White is unable to approach at J2, so White is dead. | translate this |
| Easy win for Black. | translate this |
| Black has two eyes since White is unable to play J2. | translate this |
| A and B are miai for Black to live, so White is dead. | translate this |
| White has nothing here. | translate this |
| Black wins by one move with the larger eye. | translate this |
| White's best is to lose by one move due to Black's larger eye. | translate this |
| Black has 2 eyes to the right so White is dead. | translate this |
| Black has 2 eyes on the right so White is dead. | translate this |
| Bulky five. | translate this |
| Black kills in sente since Black already has 2 eyes on the right. | translate this |
| White can't catch Black F2/G2 and is reduced to a bulky five. | translate this |
| White can't catch Black F2/G2 so is dead. | translate this |
| Black kills half the group in sente and is happy. | translate this |
| Black has this ko for the whole group or he can kill half in sente unconditionally by playing F3 instead of A4 earlier. | translate this |
| This fails because White can no longer force Black to require an approach move here (and White D1 is gote if she tries). Please use the navigate solution option starting G2, F1, A4 for the full variations. | translate this |
| Can White save herself? | translate this |
| In this variation White wns by one point, but Black C3 was a mistake. | translate this |
| Since White can't play A3, he is dead. | translate this |
| White can't play A3, so he is dead. | translate this |
| White magics up a ko. | translate this |
| Two eyes. Count 'em. | translate this |
| After setting up this double snapback, White wins! | translate this |
| Seki! Black wins by three points only, but Black B3 was a mistake. | translate this |
| White 3 was the key move. | translate this |
| A is ko. | translate this |
| Kill unconditionally. | translate this |
| Seki, Black wins by one point (the prisoner)! | translate this |
| Black has lost! | translate this |
| This is not good for White :) | translate this |
| And White wins. | translate this |
| This is a one point loss for White... | translate this |
| White E6 doesn't work! | translate this |
| Of course, Black can't play this way. | translate this |
| This is hopeless: Black wins by three points. | translate this |
| This is the worst: Black wins by four points! | translate this |
| Not bad, but Black still wins by one point. | translate this |
| Seki! White wins by 2 points (4 prisoners against 2). | translate this |
| Taking the ko is worse (see variations). | translate this |
| Black is completely lost. | translate this |
| It's to late to start the ko now - Black wins by one point (the prisoner). | translate this |
| Black wins by one point (the prisoner). | translate this |
| White can't start the ko any more and will lose by one point (he has to sacrifice a stone to prevent a Black eye). | translate this |
| B4??! Stupid Black :) Instead of this big mistake, he should have played Black C3 (see variations). | translate this |
| B4??! Stupid, stupid Black :) Of course, if Black plays C3 himself instead, it's a seki (see variations). | translate this |
| Seki and jigo, but both can do better! | translate this |
| White is lost - 'one eye beats no eye'! | translate this |
| Maybe Black can also play D2 instead of D1, but as usual I am not sure about the rules :) Anyway, this is a three point win for Black. | translate this |
| White to move - what's the best he can do? | translate this |
| Seki, Black wins by one point (the prisoner). | translate this |
| Seki and jigo... | translate this |
| This time, White has an eye, and Black has none... | translate this |
| Black wins (one eye beats no eye). | translate this |
| Black missed the vital point. | translate this |
| Seki, White wins by one point (the prisoner). | translate this |
| Black has no eye, so White wins. | translate this |
| Black wins - B3 is a point that can not be missed. | translate this |
| Black to move - does the ladder at A work? | translate this |
| Ko, bad. | translate this |
| Snapped back! | translate this |
| White just played B8, is this a tesuji or a mistake? | translate this |
| Black gets 3 stones in sente, and might optionally invade the moyo at the left, but White lives. | translate this |
| This is obviously good for Black; White should never play it. It is here only to show what would happen if White played it. | translate this |
| Black gets the corner. | translate this |
| White has a single eye. | translate this |
| And Black wins. | translate this |
| Seki and jigo. | translate this |
| Correct! Black wins by 3 points! 1 point for D3 and 2 (prisoner) at D2. | translate this |
| Sorry, Black wins 3 points. | translate this |
| How many points does Black win by playing at A? Play at B8 for 2, D8 for 3, F8 for 4 or H8 for 5. | translate this |
| Sorry, try practicing counting more often. | translate this |
| Sorry, no. It's worth more. | translate this |
| Close. | translate this |
| Oops! Close. | translate this |
| Sorry, not this much. | translate this |
| Correct: 10 points. Black C1 wins 9 points (4 stones + 5 spaces). White C1 wins 1 point at A1. Therefore, 9 + 1 = 10. | translate this |
| Sorry, it's worth less. | translate this |
| How much is A worth? | translate this |
| Seki, White wins by two points (2 prisoners against 0). | translate this |
| Seki, White wins by 2 points (3 prisoners against 1). | translate this |
| Seki, White wins by two points (3 prisoners against 1). | translate this |
| White wins by one point (3 prisoners against 2). Not bad, but 1 point worse than the correct solution! | translate this |
| Seki, White wins by one point (3 prisoners against 2). Not bad, but one point worse than the correct solution! | translate this |
| Seki, Black wins by 2 points (3 prisoners against 1). | translate this |
| Black wins! But Black B1 was a mistake, and only succeeded because White answered with a mistake on his own (White C1 instead of White C2). | translate this |
| Seki, White wins by two points (2 prisoners against 1). Black B1 was a mistake, and if White answers correctly with White C2 instead of White C1, he can win. | translate this |
| If you want to play A or B now, please choose A. | translate this |
| 7 + 4 = 11 points. Please use the navigate solution feature for more details. | translate this |
| Black has 3 points (he needs to defend at A) and 4 prisoners, with a total count of 7 points. | translate this |
| White secures 4 points. | translate this |
| How much is A worth? (Please DO NOT play at A.) | translate this |
| Note that Black can tenuki after White A. Please use the navigate solution feature to see why. | translate this |
| After removing dead stones, Black has 5 points of territory. Note that White has 2 dead stones, Black has 2 stones taken as prisoners, so these cancel out. | translate this |
| How many points does Black have in the corner? | translate this |
| With his next move, White will capture with D3, securing a jigo. | translate this |
| White wins - BC2 was a mistake. | translate this |
| Correct! Black can win 2 points by playing A. If White plays A, then Black must defend the cut at F2 (triangle). 2 + 1 = 3. | translate this |
| Sorry, this is not quite right. | translate this |
| Sorry, try counting again, please. | translate this |
| How many points is A worth? | translate this |
| Now, you can explore various paths above. | translate this |
| Wrong. After you select the correct number, you may explore possibilities. | translate this |
| How many ways to kill without ko? | translate this |
| Seki and jigo! Four groups on a 4x4 board... Black A3 was necessary: if White can play there, Black will have to sacrifice a stone, giving White a win. | translate this |
| White A3 is too slow. | translate this |
| Black wins big. | translate this |
| White wins, but Black C1 was a mistake! This move should have been at B3. | translate this |
| Save the 4 White stones without ko. | translate this |
| Correct answer. Now you can explore. | translate this |
| Wrong. After you select the correct number, you can explore. | translate this |
| Note however that with better play, White could have made a ko. | translate this |
| Only one real eye. | translate this |
| Indeed, ko is the best you can do. | translate this |
| The corner is too small for two eyes. | translate this |
| Not enough room for two eyes. | translate this |
| Temporary seki - Black can kill the stones to the left. | translate this |
| Seki - White lives. | translate this |
| It is not easy to deal with this group. See problem 2599. | translate this |
| Another, more complicated option exists. See also problems 2598 and 2599. | translate this |
| Right! This is the only move that stirs up some trouble. | translate this |
| White doesn't achieve anything. | translate this |
| White is one point behind. What's his best chance for victory? | translate this |
| White has made a 2 point sente profit and will now win the game by 1 point. | translate this |
| White made a several point profit and easily wins the game. | translate this |
| White makes no use of his earlier move like this. | translate this |
| Black played the marked stone in answer to White's first line move. How should White continue? | translate this |
| These are the only moves that kill White, while retaining the lead. | translate this |
| White can't be killed unconditionally. | translate this |
| Black's loss is too big. | translate this |
| White tried the marked move. How to respond? | translate this |
| All White's efforts have been in vain, but it was a nice try nevertheless. | translate this |
| Honinbo Shuwa found the best moves. Can you? | translate this |
| Actually, Black's last move is not even necessary; it is only shown for clarity. | translate this |
| Ko for the whole group; this usually is worse for Black. | translate this |
| Black did not answer the marked stone. What can White do now? | translate this |
| White can play ko if she has enough threats (or she could have chosen sente seki instead by connecting the ko earlier). | translate this |
| Black cannot win the double ko. | translate this |
| Double ko, White wins. | translate this |
| Ko. White takes first (White connects at A3 to finish the ko). | translate this |
| Ko. White takes first (Black would play B7 next). | translate this |
| Ko. White takes first (Black would play B7 next). A8 instead would have given White a seki. | translate this |
| Double ko. White wins. | translate this |
| Ko. White takes first. A8 instead would have given White a seki. | translate this |
| White wins through double ko; see variations at B1. | translate this |
| White wins through double ko. | translate this |
| White wins here. | translate this |
| White is ahead. | translate this |
| Can Black live in the corner? | translate this |
| Seki. Black wins by one point (the prisoner). | translate this |
| Seki, each side has 5 prisoners. This is only a jigo! | translate this |
| Seki! Each side has 5 prisoners, so this is only a jigo! | translate this |
| This is better than Black D1! | translate this |
| White wins, but both White C1 and Black D1 were mistakes! | translate this |
| Black has no other ko threats, so he passes. White wins by 0.5 points. | translate this |
| White has no other ko threats, so he passes. White loses by 0.5 points. | translate this |
| Seki. Big loss for White. | translate this |
| White is dead (Black can play in D1 and kill the group if he wants). | translate this |
| White is dead (Black can play D2 and kill the group if he wants). | translate this |
| The komi is 6.5. White to play and win the game. | translate this |
| And Black wins! | translate this |
| Seki and jigo (1 prisoner each)! | translate this |
| Seki and jigo (1 prisoner each) - Black D3 was a mistake! | translate this |
| Black to move - what's the best he can do? | translate this |
| Ko is not the best Black can do. | translate this |
| Okay, now how to handle this? | translate this |
| Incorrect. This move is unnecessary. | translate this |
| Does White need another move in the corner? If so, play at A. Otherwise, tenuki at B. | translate this |
| Ko. White can play a threat somewhere else. You will have to answer that or end the ko here. Even if White has no threats anywhere you have to spend an extra move here, so this is always wrong. | translate this |
| Seki and jigo (2 prisoners each)! | translate this |
| Uh oh... White wins! | translate this |
| Nice try, but since there is no stone at D4, Black can capture at B4. | translate this |
| This was easy :) | translate this |
| Now White has only 1 eye at K16. L14 is not an eye. | translate this |
| Now White can only have 1 eye, at K16. The group in L14 cannot be eaten. | translate this |
| White is alive. The group has two eyes at K16 and L15. | translate this |
| White is alive. The group has two eyes at K16 and L14. | translate this |
| Now White has only 1 eye, at K16. L15 is not an eye. | translate this |
| Black has to kill the White group. | translate this |
| White has made territory, caused Black to over-concentrate his forces, and kept sente. However, because Black has made great thickness, proper timing of the 3-3 point play is required. | translate this |
| NB. If Black had played O2 here, White could reply: i) P4 if L3 is strong (see problem 2701), ii) O3 if L3 is weak (giving up the corner, and attacking the lower side). | translate this |
| Please play at A to start. | translate this |
| White passes, Black connects - jigo. | translate this |
| Black loses by 1. | translate this |
| Black must settle for jigo now. | translate this |
| Easy White win. | translate this |
| Black loses by 3. | translate this |
| Black's shape at the top isn't strong enough to play ko here. Black loses by 2. | translate this |
| Black's shape at the top isn't strong enough to play ko here. Black loses by 4. | translate this |
| Black's shape is not strong enough to play ko here. Black loses by 4. | translate this |
| The score in this corner is the same as the main line but White now has no ko-threats or other aji to work with. | translate this |
| This presents no danger to Black. | translate this |
| Black can't recover from this loss. | translate this |
| Black loses by resign! | translate this |
| Black loses by 11. | translate this |
| Black loses by 6. | translate this |
| Black's best result? (No komi, no prisoners, Japanese rules.) | translate this |
| There's a better way to capture Black. | translate this |
| Basically this kills Black, but there's a cleaner way to capture. | translate this |
| Please finish Black off with as little aji as possible. | translate this |
| Black is going to try something nasty. Stop him! Choose E for (relatively) 'Easy', M for 'Medium' and H for 'Hard' resistance by Black. | translate this |
| Sooner or later Black has to scarifice a stone to prevent a White eye. White wins by one point! | translate this |
| Seki & Jigo! White C2 was wrong... | translate this |
| White wins by one point - White C2 was a mistake, and Black A3 was a mistake! | translate this |
| Seki. Black wins by one point (the prisoner)! | translate this |
| A and B are miai for the second eye. | translate this |
| However, bent-four-in-the-corner is an inferior way to kill - if Black is forced to take off the stones, there is the ko to worry about. | translate this |
| Oops... The hamete play was at White at P17. | translate this |
| This is bad for Black. The trouble started with P17. | translate this |
| This is good for Black. Keep the two White groups separated. Black's initial response at A is the usual response and is not the best play. | translate this |
| After White extends, Black can make a large scale attacking move that depends on the rest of the board. | translate this |
| This sequence ending with White N13 completes the joseki. The resulting position is considered equal for both Black and White. Black has a reasonable corner with a future play at A and White has good development on the outside. | translate this |
| If this sequence were to happen early on during the game, Black would have lost by this time. White's development on the outside is too great for Black to overcome, particularly if both players are strong kyu or higher. Where did Black go wrong? | translate this |
| This sequence ends in ko or seki. The key move was Black A. This shows that you were thinking on the outside rather then the inside. | translate this |
| White's play at A led to the downfall. The key move was Black B. This shows that you were thinking on the outside rather then the inside. | translate this |
| Ends in ko. The key move was Black A. This shows that you were thinking on the outside rather then the inside. | translate this |
| Ends in ko. | translate this |
| The problem now starts. White cuts -- how should Black respond? | translate this |
| This is the lead-in sequence. Just play the marked moves. | translate this |
| This sequence is known as the 'Tsukenobi' (Attach Extend) Joseki. A and B are alternatives to K17. | translate this |
| This sequence is known as the 'Tsukenobi' (attach extend) Joseki -- a very good joseki to know --and it is one of the best joseki for handicap games. It would be a greater advantage had Black a stone at A. However, for lower kyu ratings, unless one is aware of the various positions, one can get into a lot of trouble. | translate this |
| This sequence is known as the 'Tsukenobi' (attach extend) Joseki -- a very good joseki to know --and it is one of the best joseki for handicap games. It would be a greater advantage had Black a stone at A. However, for lower kyu ratings, unless one is aware of the various positions, one can get into a lot of trouble. B is an alternative. | translate this |
| If you made it here you successfully finished the tsukeosae (attach block) joseki, however you did not do the tsukenobi (attach extend) joseki. | translate this |
| While the move at A is correct for a Tsukeosae (attach block), it is not the joseki that we are after. You may continue down this path (though it will lead to a wrong ending for this problem). | translate this |
| After the exchange Black is left with an overly concentrated group of stones. Black has a large weakness at A, and the ownership of the corner is small and in doubt for Black. | translate this |
| After White A, Black will be able to squeeze the opposite White group with Black B and C. Other pincers are possible. | translate this |
| The Black response at A is the correct move, and should obvious to stronger players. Now continue -- punish White's two lonely stones. If looking for a pincer, play at B. | translate this |
| If Black chooses this exchange, White will be able to take the corner. | translate this |
| Black retains the corner with A. | translate this |
| White plays tenuki - please play A to see if the corner can be saved. | translate this |
| Play A to settle the right side. | translate this |
| The Black response at A is the correct move, and should be obvious to stronger players. Play B to see if White can be harassed. | translate this |
| This is how the position begins with White playing at A. Now how to proceed? | translate this |
| Black cuts at 1. Please connect the two White groups. | translate this |
| Black captures two stones in sente. | translate this |
| Ko for the whole group. | translate this |
| Black captures two stones in sente, but White is left with more points than in the correct solutions. | translate this |
| Oops... White dies. | translate this |
| Black captures 2 stones in sente. | translate this |
| This captures two stones, but in gote. | translate this |
| Black gets a seki this way, but it is gote. | translate this |
| Black gets a seki, but it is gote. | translate this |
| Black captures two stones, but this is gote. | translate this |
| Black captures two stones in sente. Note that White C18 is necessary because of Black C18-White C19-Black E19. | translate this |
| Black achieves nothing. One piece of comfort: this is how I played when I got this position in a game. | translate this |
| Black captures two White stones, but in gote. | translate this |
| Black does capture two stones this way, but in gote. | translate this |
| Now White has only four points (this move is necessary because Black threatened E19 with double snapback). | translate this |
| Now Black gains the other two stone in sente. White's territory is only three points here. | translate this |
| Black switches the scene. | translate this |
| A ko is fought over the whole group. | translate this |
| White can play here, but it is not as good. | translate this |
| Black captures two stones, but in gote. | translate this |
| Black makes a seki, but in gote. | translate this |
| Black must win the ko to even get a gote seki; he can do much better. | translate this |
| Black must win a ko to even get a gote seki. | translate this |
| Black can get a seki this way, but it will be in gote. | translate this |
| Black can get a seki this way, but it will be in gote (if Black plays tenuki now, White can capture the Black stones). | translate this |
| White wins big. Black D2 was bad! | translate this |
| White got greedy and is now caught. | translate this |
| Ends in an inferior position for Black. White playing at A was patient and prevents Black from playing at B. | translate this |
| White gets out but Black has built influence. | translate this |
| The problem now starts. How does White handle the situation? | translate this |
| Black plays hamete. Play at A to keep from getting fenced in. | translate this |
| This is the lead in. Please play the marked moves. | translate this |
| After this sequence, White is left with a very powerful wall on the outside. | translate this |
| After this sequence, Black has sente, but White can later enter at A to reduce Black's corner territory. Black can do better. | translate this |
| Black A weakens White's shape - how to attack? | translate this |
| Black B was the correct followup to Black A. Black is not fenced in in the corner. | translate this |
| Black has the advantage. The two White groups are separated, and Black now has outside influence. Black B was the correct followup to Black A. And C was the key play. | translate this |
| An interesting position, and Black has the advantage of the outside and corner. Can White ignore the last Black play at S16? | translate this |
| Don't forget ladders and geta. | translate this |
| This is a poor choice for White. Please continue. | translate this |
| Black should feel satisfied with this sequence. Black may further mount an outward attack on the upper right side or take advantage of White's weakness at A. | translate this |
| This is a reasonable option for White. Now continue. | translate this |
| Jigo: 8 points each. | translate this |
| White loses by 2. | translate this |
| White has no ko threats. | translate this |
| Black has no ko threats so connecting at G4 is not possible. | translate this |
| White's lower group dies. | translate this |
| White dies at the top. | translate this |
| White has no viable ko threats. | translate this |
| Black can't play so passively. | translate this |
| Black has no answer to B1 or D1. | translate this |
| Black has no answer to B1 (due to lack of viable ko threats) so can't connect at G4. | translate this |
| White loses by 4. | translate this |
| Black can't connect at G4. | translate this |
| Black takes a big loss. | translate this |
| White loses by 1 since Black wins the ko at E7. | translate this |
| White has no ko threat. | translate this |
| White to play and draw. (No komi, no prisoners, Japanese rules.) | translate this |
| Ko. Since Black could have captured White without ko I count this ko as wrong even it is very troublesome for Black. | translate this |
| Black played tenuki after the marked White move. Then White proceeds with 1 to 7. Black 8 is an overplay. White to play. | translate this |
| This is only a ko, White can do better. | translate this |
| Black saves all his stones and all his points. | translate this |
| White played N4 one move too late. | translate this |
| White is one move too late. | translate this |
| Black saved his stones and his points. | translate this |
| Black offers the strongest resistance! | translate this |
| This is of course better for Black than the main variation, but... | translate this |
| White to play - what can he do? | translate this |
| Black gains enough liberties to fight back. | translate this |
| Successful backstab! Too bad Black's middle group escaped! | translate this |
| An assassin, how sneaky! Guards! Arrest him!! | translate this |
| Black threatens the White stone and has time to escape. | translate this |
| After months of fighting, Black troops catch Shicho-disease. Very deadly! | translate this |
| Black connects and is safe. | translate this |
| Black's liberties allow him to cut through White's lines. White can do better. | translate this |
| Don't let the Black stones in the middle escape. | translate this |
| Too easy. | translate this |
| Black's gonna need some tesujis in the corner to secure life. | translate this |
| If Black has some back up in the lower right this way of playing can't be bad for him. | translate this |
| White has sacrified the hamete stone (A) and squeezed Black's stones into an overly concentrated group of stones. Black is now left in a very difficult position. | translate this |
| The Black stones are too heavy, but many players would be satisfied with Black's position. Black can do much better. | translate this |
| Black's outside stones are toast. | translate this |
| White does not need to play the ko. And White can instead play to take the outside. | translate this |
| Black's only hope at this point is to play ko with A. If White choses to play ko, this would be a very long ko battle for Black to win. | translate this |
| Black is alive in the corner, however Black's outside stones are in trouble. | translate this |
| Black has many weaknesses to exploit. | translate this |
| Black's shape is very poor. | translate this |
| White has taken the corner with 5 stones, leaving Black's 5 stones overly congested. | translate this |
| Black has great strength in the corner. Later Black will have a strong attack on either of the two White groups by playing at A or B. The correct response to the hamete was Q18 (C). | translate this |
| This exchange is about equal for both players. Later, Black has a play at A aiming at a tesuji play at B. | translate this |
| Black looks a little thin but A and B are sente against the corner so Black is more powerful than he looks. | translate this |
| This is White's best play at this point. | translate this |
| This exchange is very bad for Black. White has a strong corner, and Black has only a weak string of stones on the outside. | translate this |
| White A is hamete; how should Black respond? | translate this |
| This position is unacceptable for Black. | translate this |
| Black. So very many stones doing so very little. | translate this |
| After White A Black loses the corner. | translate this |
| Black plays A and lives, however Black has lost the corner and the Black stones are overly concentrated. | translate this |
| After this exchange, Black is left with a very secure corner, and White is left with very little for the hamete investment. | translate this |
| This is a position that is poor for White. Saving the outside White stones doesn't help much and the White corner group is not alive yet. White can live in the corner with gote. | translate this |
| White has very little to show for all his efforts. | translate this |
| Please play A. This is another tesuji to separate the White stones into two groups. | translate this |
| Black has a very strong position. | translate this |
| Please play A. White can safely live in the corner, but there are bigger things than the corner. | translate this |
| White A is hamete. How should Black respond? | translate this |
| Black is too concentrated, and White has also taken the corner away from Black. Six stones to capture one stone. | translate this |
| Black is too concentrated, and White has also taken the corner away from Black. Six stones to capture one stone! | translate this |
| White's cut is very serious trouble for Black. | translate this |
| O18 is natural. | translate this |
| Six stones to capture one. And the corner is still up in the air. | translate this |
| White gets a very small corner and Black has a very strong position on the outside. | translate this |
| The White corner is dead and White's influence on the outside is very small. | translate this |
| Black has very good strength on the outside. | translate this |
| Black at R16 left a weakness at S16. Black can only defend this weakness with gote and in doing so had to play two moves (1 and 2) to defend against the hamete stone A. | translate this |
| Black ends up overly concentrated in the corner. | translate this |
| Black's position is over concentrated. | translate this |
| White responds with a tesuji. | translate this |
| Play A (tenuki) or B. | translate this |
| After this exchange, Black's position is too cramped. | translate this |
| The exchange is very favorable for White. | translate this |
| These are very strong plays for White. Black's position is over concentrated, and White has taken part of the corner. | translate this |
| This is what White is expecting. | translate this |
| Black finishes with A. This may seem like a good exchange for Black. But Black's position is too heavy. If you come to understand this, then you are on your way to becoming a stronger player. | translate this |
| Ouch. The cut is very painful. | translate this |
| Black uses a tesuji and White loses the marked stones. | translate this |
| White loses the four marked stones and the White stones on the left are over concentrated. Black now has a good sized corner and room to expand. | translate this |
| S16 is the correct response to S15. However, White plays another hamete and another problem for Black ensues. | translate this |
| White 3 is hamete. How should Black respond - A, B, or C? | translate this |
| Black gets a solid corner but White gets a nice position on the outside. (There's still a mayor gap at N16 to aim at for Black so White's position is not that impressive.) | translate this |
| Black gets a solid corner but White gets a nice position on the outside. (Although White is stronger than before, Black has more territory and he still has the cut at M16 to aim at. If White want to keep the center influence intact after the cut, he should continue by pushing along the 5th line giving Black a very nice 3rd line territory.) | translate this |
| Black gets a solid corner but White gets a nice position on the outside. | translate this |
| White gets too much influence this way. (Black gains a little territory compared to the 1st variation but there are hardly any weaknesses left in the White position. Therefore this is not good.) | translate this |
| You should note, however, that White has a lot of aji in the corner. | translate this |
| You should note, however, that White has a lot of aji in the corner. Black 5 can be considered to be a little slack but that's a fairly minor point. | translate this |
| White played 5. How should Black respond? | translate this |
| After this exchange, White's position is far better than Black's. | translate this |
| Black loses the corner. | translate this |
| The result is ko. This sequence is to White's advantage for two main reasons. First, White may choose not to play the ko battle and lock Black in the corner by playing at A, giving White a very strong outside stance. Second, Black's first move (B) is incorrect, and Black has a better move other than the ko battle. | translate this |
| White starts a tesuji. If White goes for the double atari at S16, Black can capture White's group at Q18. | translate this |
| After this exchange, Black lives in the corner. However, Black's stance on the outside is very weak. | translate this |
| This exchange was bad for Black. | translate this |
| Locally White's position is okay. But since he originally wanted to stress the upper side this change in direction is bound to be in Black's favor. Note, however, that there are other moves for Black to play if this result is not satisfactory. | translate this |
| This is almost the normal joseki outcome, but White has exchanged R15 for S15 now. This is a bad exchange for White; he not only loses a liberty and a ko threat but also the aji of peeping at S15 later, which means that White R12 is not much of a threat now. | translate this |
| You found the tesuji; see if you can play it out. | translate this |
| White must decide which side it is going to lose. A difficult decision for White. | translate this |
| The three marked sones are dead and Black's position is superior to White's. | translate this |
| White will either lose the four stones on the upper portion of the board, or the two White stones on the right. | translate this |
| At this juncture the next Black play may be difficult to find. Try examining this position before proceeding. (Note: only the correct response has been provided.) | translate this |
| White did not follow the normal joseki sequence and played hamete by playing the hane at 6. How should Black respond? (Select A, B C or D.) | translate this |
| As you can see, Black has succeeded in keeping the corner and capturing the five White stones, but Black paid an extravagant price to accomplish these goals. White has a solid outside wall with tremendous influence. The potential profits White may gain with this wall should be enormous. The move at A (H15) is a natural response, however by playing at A, Black has taken the bait and there is no turning back. | translate this |
| This position is not as solid for White as if Black had played D18 (see the comments there). However White has nothing to be unhappy about. White still has the superior position. | translate this |
| Interestingly enough, D17 was slightly better move than D18 for Black, even though D18 could be regarded as a better shape move than D17. At a certain stage of development students of Go learn to discern good from bad patterns. During this stage many players become slaves to playing only pattern-type moves. Learning patterns is very important to Go, but one must abandon instinctive play to begin re-thinking. | translate this |
| (Note other plays in the direction of E12 are possible depending on the rest of the board.) At this juncture Black's position is better then White's. If White runs with three stones in the middle, Black builds territory on the left side by chasing White. If White tries to save the stones on the left, Black gains a very strong position on the outside, further weakening the three White stones in the middle. Now if you look carefully, the White corner is not unconditionally alive!. If White does not play another stone in the corner -- he is loathed to do -- there will be a ko battle. The ko battle is not favorable for Black, because it is a two stage ko, nonetheless, Black has nothing to lose by playing it out. | translate this |
| Select A, B, or C. | translate this |
| White plays into the corner in an attempt to make two eyes. | translate this |
| After this exchange both groups live in the corner. However, Black has the better position on the outside. Black has strong outside influence for territory on the upper board, and threatens the White group on the left side. The future of the weak White group on the left side is in doubt, and it is senseless for White to try to escape with the two White stones in the middle. | translate this |
| White tries to separate the single Black stone at F15. | translate this |
| White's move A is a difficult cut for Black to answer without falling into a hamete trap. The problem starts -- how does Black proceed? | translate this |
| The following is the set up sequence. Please play the marked moves. | translate this |
| Black cannot stop White's connection. White has now taken the corner and side, and Black has an over-concentrated position. | translate this |
| The White groups connect along the side. | translate this |
| This results in very bad shape for Black. | translate this |
| The White move here threatens a connection from the White corner group to the side group. Black has followups at: A, B, and C. | translate this |
| After this exchange White has been fortunate to take both the corner and side, leaving Black pinched between the two White groups with an over-concentrated group of stones. This position also leaves behind an interesting aji point at the marked spot, with plenty of mistakes for Black to make. To explore what happens if White does play P16 play at A. | translate this |
| After this exchange White has been fortunate to take both the corner and side, leaving Black pinched between the two White groups with an over-concentrated group of stones. | translate this |
| White has cheated Black out of his corner. | translate this |
| The Black stones are over-concentrated and limited in expansion by the two White groups. If Black had a stone at K16 at the start of the sequence this path would have led to the second best for Black. | translate this |
| After this exchange, Black has strong outside influence, and White is separated. | translate this |
| Play A to connect. | translate this |
| This exchange leaves White precariously posed. Black has a better outside position, and the two White groups are eyeless and without any outside reliable influence. | translate this |
| The next Black move is difficult to find. | translate this |
| After Black A, White must worry about his two weak stones on the right and the weakness in his knight move; if these White stones are cut of from the outside, they may die in the corner. | translate this |
| This exchange leaves White in a very weak position. | translate this |
| White R13 is an overplay. | translate this |
| White surrenders the outside to Black. | translate this |
| White just played a hamete at the marked stone (Q17) instead of following the normal tsukenobi (attach extend) joseki. How should Black respond? | translate this |
| White sacrificed two stones to gain a strong position on the right, keeping the Black group confined. In addition an original Black pinching stone at K3 has been rendered useless. Black's Initial move at G5 wasn't a forcing move, allowing White to play J4 that threatened the single Black stone on the right. | translate this |
| After this exchange, the Black stones are confined, White has become stronger on the right and Black's K3 stone has been rendered useless. | translate this |
| Black is over-concentrated, while White has solid groups on both sides. | translate this |
| The result is a very strong outside position for Black. | translate this |
| White loses the edge. | translate this |
| White tries to protect his investment. | translate this |
| After this sequence Black has gained territory on the side and has developed influence on the outside. | translate this |
| White 13 (G4) is hamete. How should Black respond? | translate this |
| A snapback! | translate this |
| The White attack failed. | translate this |
| White wins! This is good enough for White, but please note White R4 instead of White S4 would have killed the whole group - in the actual variation, Black could have lived by playing Black S3 at R4. | translate this |
| Black is safe now. | translate this |
| A snapback! This is good enough for White, but R4 instead of S4 would have killed the whole group (here and now, Black can live with R4). | translate this |
| Of course, Black refuses to compromise :) | translate this |
| This is best for Black, but... | translate this |
| The threat of White A is gone. | translate this |
| After this, White can't do anything. | translate this |
| And now, Mr. White?! | translate this |
| White to move - is there anything he can do? | translate this |
| Hopeless ko for Black. | translate this |
| Bet you didn't see this move coming, eh? | translate this |
| You're quite smart so far. | translate this |
| Nice. Dead in gote. | translate this |
| Gote dead. | translate this |
| Now, just make two eyes here and you're set... | translate this |
| Woe is White... Or is she? | translate this |
| Seki & jigo. The White stones make a 'c' now :) | translate this |
| With his next move, Black connects the ko: seki & jigo (one prisoner each). | translate this |
| Seki & jigo. | translate this |
| Now, please capture :) | translate this |
| With his next move, White connects the ko. Seki, White wins by one point (the prisoner). | translate this |
| The standard reply to hane at Q1, is S2. Other replies take less territory, leave aji, become ko, or die. | translate this |
| Please see problem 2695 for why this is inferior for Black. | translate this |
| Black lives, but takes 1 point less territory than the correct reply. | translate this |
| A bad ko for Black. | translate this |
| The standard reply to a hane at T5 is T2. Other replies take less territory, lead to seki, become ko, or die. | translate this |
| Black lives, but takes less territory than the correct reply. | translate this |
| White can play T6 in sente if he wants. This move is not sente if Black had replied to White Q1 correctly (at S2), and it may give White options in the upper right side if Black has some stones there. | translate this |
| Black lives, while White has lost 2 stones needlessly, and left other aji. | translate this |
| Black lives, while White has lost 1 or 2 needlessly. | translate this |
| T5 is sente but after R1 it doesn't really gain White anything. | translate this |
| Instead of S2, Black has responded to the hane at Q1 with A. Exact the cost of this mistake. | translate this |
| Black has an eye, White has no eye, so... Black wins! | translate this |
| White is short of liberties and can't atari with A1, so Black wins. | translate this |
| Seki, Black wins by one point (the prisoner). This is not as good as the solution! | translate this |
| 'One eye beats no eye' - Black wins! | translate this |
| Yes, he can. | translate this |
| White has played 1. What should Black do in response? Can he save all his stones? | translate this |
| White lives in sente. | translate this |
| A damaging ko for Black to lose; but if White loses, she should gain compensation elsewhere. | translate this |
| The Black error of playing A is heavily penalized. | translate this |
| White lives in gote; she should only play at A if not sure of either winning the ko, or gaining compensation elsewhere for losing it. However, S19 is probably 1 point better for White than S17. | translate this |
| White lives in gote; she should only play at A if not sure of either winning the ko, or gaining compensation elsewhere for losing it. | translate this |
| White can choose either to leave a ko and keep sente, or to live in gote by playing at A or B. | translate this |
| White lives in gote; she should only play the second move at A if not sure of either winning the potential ko, or gaining compensation elsewhere for losing it. | translate this |
| Black wins :) | translate this |
| This leads back to the solution... | translate this |
| Seki, Black wins by one point (2 prisoners against 1). | translate this |
| This move is also possible, of course. | translate this |
| This is wrong for White.... | translate this |
| Do not play at A. | translate this |
| This exchange is bad for Black since it erases most of the aji of the marked Black stone. | translate this |
| The stone at A was the key to solve the problem. | translate this |
| The stone at A was the key to solve the problem. This sequence was the one played in the original game. Here, Black resigned. | translate this |
| This is a ko. You can do better. | translate this |
| Connect the marked stones unconditionally in order to save the White group. | translate this |
| This is wrong! | translate this |
| You connected in gote, but this is not optimal. | translate this |
| Can Black catch the marked stone while not losing anything? | translate this |
| Simple and best. If White takes the stone, it's gote, and Black is in no immediate danger along the bottom. | translate this |
| Not too bad, but N3 helps the O3 stone more and makes better shape. | translate this |
| This is gote now. | translate this |
| Black needs another move to fix M2. White has decent shape and can perhaps attack at F5. | translate this |
| This is good for eyeshape, but after White takes L4, it's easier for White to stop Black jumping into the center than if Black had played N3 originally. | translate this |
| Bad choice. White now lives. | translate this |
| White living is big. | translate this |
| Your original move did not help you. | translate this |
| White ataris at 1. How should Black respond? | translate this |
| Seki & jigo (1 prisoner each). | translate this |
| Jigo & seki (1 prisoner each). | translate this |
| Seki, Black wins by one point (2 prisoners against 1)! | translate this |
| Black makes an eye and wins. | translate this |
| Seki, Black wins by three points (the prisoners). | translate this |
| Next, White captures at D4 and wins by two points (the 2 prisoners), but he can do better! | translate this |
| Next, Black will connect the ko. White wins by 1 point (2 prisoners against 1) then. That is not good enough! | translate this |
| White connects the ko and wins by two points (3 prisoners against 1). But he can do better! | translate this |
| White connects the ko and wins. | translate this |
| White lives and wins. | translate this |
| Seki, White wins by three points (the 3 prisoners). This is not best; White can capture all the Black stones! | translate this |
| Seki, White wins by three points (the 3 prisoners). But White can capture all the Black stones! | translate this |
| Next, White will connect and then capture at D4. This will be a one point win (two prisoners against 1) - he can do much better! | translate this |
| Seki, White wins by three poimts (the 3 prisoners). That's not best, White can capture all the Black stones! | translate this |
| Seki, White wins by three points (the 3 prisoners) That's not best, White can capture all the Black stones! | translate this |
| Seki, White wins by one point (the prisoner). He can do much better! | translate this |
| What would you do now, if you were White? | translate this |
| White has broken out of Black's trap. | translate this |
| A full triangle is generally considered a good thing, but White is still poised to escape. | translate this |
| This problem is problem 5 from volume 2 of the Nihon Ki-in's 'Understand the Basics: Go Training' book. Black to capture the marked White stone. | translate this |
| This is not best. It is seki but White has captured 2 stones. | translate this |
| This is not best. It is seki, but White has captured two stones. | translate this |
| This is not best. It is seki but White has captured two stones. | translate this |
| White lives with territory. | translate this |
| This would be a failure for White. | translate this |
| This is a gote seki (for Black) but White can capture the stones at P1/Q1 and Black has to sacrifice another stone to be alive in a seki. In the correct solution Black can get a seki without sacrificing stones. | translate this |
| What does Black have in the corner? | translate this |
| This would have been better for Black. | translate this |
| Black should not play here. | translate this |
| White lost his chance. | translate this |
| What should White do? | translate this |
| The Black group is alive. It has a eye at B19 and another at D19. | translate this |
| White has to win the ko now. | translate this |
| The Black group is dead. | translate this |
| The Black group is dead. The stone at D19 cannot be eaten. | translate this |
| The Black group is alive. | translate this |
| The hana-roku (rabitty six) with vital point occupied is worth 11 dame internally, so both groups in the semeai had the same number of dame at the start, and whoever plays first can win it. Black could not afford the tenuki, but he now has sente, whilst White has 13 ko threats. | translate this |
| The hana-roku (rabitty six) with vital point occupied is worth 11 dame internally, so both groups in the semeai had the same number of dame at the start, and whoever plays first can win it. White has lost no points making sure of this, but has used up 12 ko threats. | translate this |
| White wins the corner. The hana-roku (rabbitty six) with vital point occupied only needs 11 more internally unanswered White moves to capture. Black should have let White play at T. Also, after the tenuki, Black used 13 of the 14 ko threats he had. | translate this |
| Either tenuki at T and then start the semeai at A; or, start the semeai at A allowing White to play T. | translate this |
| Black's dead! | translate this |
| Black's dead. (After N3 we have a bent 4 in the corner.) However as Andre E. mentioned in the comments White M1 is better at N3. In case White will need to capture the corner earlier, it allows avoiding the ko. | translate this |
| White N3 is the correct response. See the comment after M1 for an explanation. | translate this |
| L1: yes, this is a killer sequence... I found out the hard way. After this, Black's dead. Check out the solution. | translate this |
| Nice! The corner, is dead... Check out the solution if you're unsure. | translate this |
| Black's dead. (It's the key point of a 'Full corner 6'.) | translate this |
| Can Black play and live? If not, play at the upper right empty corner hoshi (K10 -- marked as T). | translate this |
| Overplay! The Black group was already dead. | translate this |
| Overplay! The Black group was already dead. You made it alive (message from Black: 'thank you'). | translate this |
| The Black group is already dead. | translate this |
| Black just played at A to try to make his group alive. Where should you play? Choose Q16 if you think that White doesn't need to play. | translate this |
| Hmm... Not again?! | translate this |
| And oops? | translate this |
| Nice. (Lucky, aren't we?) it doesn't count, though... | translate this |
| Uga-uga... Yay! If only it counted, eh? | translate this |
| Nice! (Hmm... hmm...) | translate this |
| Nice... (Guh - you were following the red, point, weren't you? What did you expect?!) | translate this |
| Nice. But not all White players make such mistakes... | translate this |
| Suicide... Ohohoohooo... (Thanks, spica - White M3: This kills the lower 2 Black groups.) | translate this |
| It's life. Ohoho. | translate this |
| Simple and nice. | translate this |
| You really like these eyes, don't you? Otherwise, you'd play at N4. | translate this |
| Guh, I don't believe, I added this. | translate this |
| Hmm... Life... KOOL! | translate this |
| Why do people choose to decrease their territory?! | translate this |
| This would suck, wouldn't it? | translate this |
| Going for White? | translate this |
| Hmm, Black should be a bit more careful. | translate this |
| Bummer, eh? | translate this |
| Kamikaze. | translate this |
| It's alive. Who'd have guessed, eh? | translate this |
| So, you want to keep it alive? | translate this |
| Be more careful. Next time, it can happen in a real game. | translate this |
| If only White would always allow you to do this. | translate this |
| Got ya! Nice! | translate this |
| This means trouble. | translate this |
| Almost got away! | translate this |
| This is a bad move, eh? | translate this |
| Gotcha! (If only White would play N3, instead of L4...) | translate this |
| I see a dead group - It's better than seeing, ghosts, eh? | translate this |
| Hmmm... Now K1 has 2 eyes! If only the two eyes were in different places... | translate this |
| White, in reality, responds at L4 to kill. | translate this |
| Don't let the corner die! | translate this |
| Black should have sacrificed the 3 stones. | translate this |
| White could have captured three stones. | translate this |
| This is seki but inferior to the correct solution as Black was able to rescue the marked stone. | translate this |
| This would be fatal for Black. | translate this |
| Endgame problem: White to gain as much as she can. Sente is not important. | translate this |
| Right. Black was already alive after Black S1. The last two moves from White should not be played but held in reserve as ko threats. | translate this |
| Oh no. | translate this |
| White can tenuki and Black remains dead. | translate this |
| This was a wasted ko threat. | translate this |
| White has played the marked stone. Black to live. | translate this |
| Please show one. | translate this |
| Five different first moves do. You can explore them... | translate this |
| How many different first moves grant unconditional life here? | translate this |
| Oh no! (Black is dead.) | translate this |
| Oh no! (Seki.) | translate this |
| Oh no! | translate this |
| It seems that you chose to not take the shortest way... | translate this |
| This move was not useful. You should use the more direct path to kill a group since it generates fewer ko threats. | translate this |
| Let's say that Black wins the ko. | translate this |
| What an easy problem. I am sure every beginner found this variation. | translate this |
| Seki. The gods didn't heard your requests. | translate this |
| White should not have played this. To punish him, you need to find the 'karma tesuji'. | translate this |
| Now try to win the capturing race... | translate this |
| Please play C4. | translate this |
| Black to play and kill the marked stones. | translate this |
| Please play A, B or C. | translate this |
| White dies (she can't stop the 1-3 sequence from being played). | translate this |
| White must sacrifice the marked stones (the rest can become seki). | translate this |
| Black is safe. White must win the ko (from playing 1-6) to get seki. | translate this |
| Black is safe. White must win the ko to get seki. | translate this |
| White must sacrifice the marked stones, she then gets a ko for seki (Black is alive). | translate this |
| White must sacrifice the marked stones for a seki. | translate this |
| White must give up the marked stones for unconditional seki. If White connects at 1 she must win the ko at H12 to get seki. | translate this |
| White can do no better than seki - see comments for this move at F16. | translate this |
| White loses (exchanging P16 for O15 doesn't help). | translate this |
| White must give up all the marked stones for seki (playing White 5 immediately after Black 4 avoids giving Black an approach ko). | translate this |
| Black wins comfortably, White needs to protect against Black A and has a weakness at B (she needs to fill 2 of her own liberties to protect the eye). | translate this |
| White to kill the marked stones unconditionally. | translate this |
| Black = 2 (territory) = 2 and White = 11 (territory) + 6 (prisoners) = 17. White - Black = 15. Sorry - not the best one. | translate this |
| Black = 5 (territory) = 5 and White = 10 (territory) + 7 (prisoners) = 17. White - Black = 12: nice! | translate this |
| Wrong. The correct answer is 3. | translate this |
| By how much is it better? (Check out the solution for the right amount.) | translate this |
| Both aren't equal - saving B7 is better! | translate this |
| This is just killing the bottom group - as it won't have 2 eyes. | translate this |
| This is just a wasted move. It allows White to decide what's better to kill. | translate this |
| Which one would you rather save? (Click on D for doesn't matter! Or save 1.) | translate this |
| Nice - you managed to kill the entire Black group. | translate this |
| Nice! Now punish Black for having played elsewhere in the lower right (muwhahahaha). | translate this |
| No, there are more. | translate this |
| You must see some that I don't. | translate this |
| Correct. But what if White did not play there, and decided to play elsewhere instead (leaving the position that Black has in the lower right). How many ways are there to punish now? That is, how many ways does White have to kill the Black group in the lower right? | translate this |
| After this sequence White plays some other 'endgame moves'... Something is wrong - where should White have played (in the lower left)? | translate this |
| Black has one eye. | translate this |
| This is only ko (Black has to make an approach move at A). Black can do better. If Black simply plays A White captures and Black has only one eye. | translate this |
| A multistep ko. Black needs two approach moves at A and B. | translate this |
| Black loses the capturing race in the corner. White A is a standard tesuji. | translate this |
| Half lives. | translate this |
| Examine the solution to see the details. | translate this |
| And which points are they? (Again, play the point with the corresponding label on the right.) | translate this |
| How many ways are there for Black to live? (Play the point with the corresponding label on the right.) | translate this |
| So Black is dead. | translate this |
| This move makes Black atari. | translate this |
| Black cannot escape in the hope to win liberties. | translate this |
| Black cannot play here directly. He needs to play E1 first. | translate this |
| Seki gote for White. It is not the best that White can do. | translate this |
| The White group is dead. Black is alive. | translate this |
| The last move of Black is not good. You are White: show him what is wrong. | translate this |
| Black had a 5 space big eye worth 8 liberties. White only had 7 liberties. White has wasted 8 of the 9 ko threats she had in this corner. | translate this |
| You're going to lose! Continue on to see why! | translate this |
| Liberties between White and the big eye group act in Black's favor, but not White's, as she must fill all of them before forcing Black to play inside the big eye. Black had a 5 space big eye with 8 internal and 4 external liberties. White only had 11 liberties. White has wasted 12 of the 13 ko threats she had in this corner. | translate this |
| Black had a 5 space big eye worth 8 liberties, White had 8 liberties; first to play won. Black has wasted 8 of the 10 ko threats he had. | translate this |
| Good job! See continuation for proof! | translate this |
| The liberty at E19 works in Black's favor, but not White's, as she must fill it before forcing Black to play inside the big eye. Black had a 5 space big eye with 8 internal liberties and 1 external. White only had 8 liberties. White has wasted 9 of the 10 ko threats she had in this corner. | translate this |
| Please play at A in the corner in which you think White can win the capturing race. | translate this |
| White has played at A in order to live. If you think you can kill White try it out at the bottom. If you think the surrounded group can live play at B in the upper right corner. | translate this |
| Invading at B is the best way for White to use her thickness above. After B4, White is ahead in territory. Higher kyu players try to use thickness to surround territory. Generally, the correct way is to find a weak point of your opponent, that allows you to drive him towards your thickness. | translate this |
| White should have used her thickness above to attack the Black stone at C10, rather than make territory from it. On the left, she is now overcongested, whilst Black's stones are efficiently placed. | translate this |
| Too early for this invasion. White may only get ko, and even if she wins it, the efficiency of Black's stone at C10 is enhanced. | translate this |
| White is trying to make territory in the center by playing D, whilst Black calmly strengthens his moyo. | translate this |
| White C is a good move locally, but it invites a jump from C10, creating a large moyo for Black, and greatly reducing the power of her thickness above. | translate this |
| Which is the best play for White, A, B, C, D, or E? | translate this |
| Nice! | translate this |
| I see. Well then, how would you open the attack? | translate this |
| ALERT-ALERT-ALERT -Black has escaped- ALERT-ALERT-ALERT | translate this |
| Can you kill the Black group at L2, if Black plays first? | translate this |
| You'll like this one. (S to start.) | translate this |
| Dead! | translate this |
| Tip: Do the opposite. | translate this |
| White plays 1. How can Black save his big dumpling? | translate this |
| White would love to capture the marked stone and link his groups. Love it. | translate this |
| Even if Black captures the stone at A he is dead. | translate this |
| 2 against 3 liberties. | translate this |
| It's 2 against 3 liberties. | translate this |
| Black is dead! He can't have 2 eyes! | translate this |
| This is a bad move, since a White play at C1 would kill the group! Hoping to get a bigger territory (by 1) causes the loss of all of it. | translate this |
| Black is dead! 2 is a false eye! | translate this |
| This is wrong, as White D1 would take away hope for a second eye! | translate this |
| Black can't get 2 eyes now. | translate this |
| Wrong. White B1 kills! | translate this |
| Black has 2 eyes, nice! | translate this |
| 2 is a false eye, therefore, Black is dead! | translate this |
| Still no chance for 2 eyes! | translate this |
| Okay, let's count the eyes: 1. That's it?! - You're disappointing me! | translate this |
| Guh, what for? White B1 kills - it denies the creation of 2 eyes. | translate this |
| I think Black is still dead - Why? Isn't 2 a false eye? Yup! (Actually, because it's White's turn and he'd play there for sure, or else Black would live!) | translate this |
| And if White follows with E1? Oh, I see, you're a believer... You believe that your opponents, will always be 30 kyus... stop messing around! | translate this |
| Yes - It's alive! (It has 2 eyes! And in order to make 2 a false eye, he'd need to play both at A and B - Black would not allow this.) | translate this |
| Black has 3 eyes, nice! (And a total of 6 points.) | translate this |
| Wow! (Black is dead!) | translate this |
| Black has 3 eyes, nice! | translate this |
| Any move would be clearly suicidal... just gives away points. Not that the attack had a chance, in the first place. | translate this |
| Phew, what's this smell? Oh... It's the rotting Black group. | translate this |
| White B1 kills. | translate this |
| Both points which could give life are caught by White already... It's DEAD! | translate this |
| Hoping to achieve what, exactly? Even if you take A1, you still will have only one eye! | translate this |
| Don't you think that it's a wasted move? Black is dead, and White has sente... | translate this |
| Black won't be having 2 eyes, now, eh? Or am I wrong? | translate this |
| Black lives! (If White tries to approach at A, Black B would solve the problem. (Variation, suggested by Ozhu.) | translate this |
| This is great. It's the only move that works after White C1. Nice! (And thanks to Ozhu for the correct following variation!) | translate this |
| Can't get 2 eyes now, can you? | translate this |
| Bad choice! White C1 kills... | translate this |
| Black can't get 2 eyes. | translate this |
| Bad choice! Black is doomed! | translate this |
| Nice, Black has 2 eyes. (To deny Black his 2 eyes, White should play at A, B and C simultaneously!) | translate this |
| I didn't add it into the actual playable variations, as any of the 'obvious' 4 locations gives life. | translate this |
| Black can't take away the 2 eyes! (If he tries to approach at A, White B should solve the problem.) | translate this |
| White clearly has 2 eyes, and Black can do nothing about it... | translate this |
| White lives - Black cannot prevent it, as 2 locations can give life. | translate this |
| 2 eyes. (Impossible to separate, Black has to play A, B and C to do so.) | translate this |
| White lives - Black cannot prevent it, as 3 locations can give life. | translate this |
| White lives - Black cannot prevent it, as 4 locations, can give life. (This is the best way to react - biggest territory.) | translate this |
| Is the marked group alive as it stands? If so, play at S and prove that it is safe, otherwise try to kill the White group on the top! | translate this |
| Black is enclosed and dies. | translate this |
| Better to enclose tightly. | translate this |
| Better not to make the previous exchange. | translate this |
| N18 is better: less aji. | translate this |
| The corner is small: Black is good. | translate this |
| Corner is small. | translate this |
| Doesn't help. | translate this |
| Ko is heavy for White. | translate this |
| You are too easy on Black. | translate this |
| Bad exchange: White gains nothing and loses a ko threat and aji. | translate this |
| Black to live and kill White. | translate this |
| This is wrong! Please check the next problem for the reason. | translate this |
| A7: a point of White territory - who could have imagined :) White wins by one point! | translate this |
| White can't win both ko's, so the result will be a jigo. | translate this |
| No komi, no prisoners! Now try the White stones please. Black just played the marked stone. How can White win now? | translate this |
| Brilliant! Could you read the sequence all the way out? If not, go back and try it. Feel the satisfaction and joy of doing it. Joy = confidence = improvement. | translate this |
| After seeing the right point at P15, it would be blindness for White to connect at 3 because he is in atari. | translate this |
| White to play. His three surrounded stones seem to have no way to save themselves, but close inspection should reveal a crack in Black's position. | translate this |
| Uhhh. | translate this |
| *sigh* | translate this |
| The White group is destroyed. | translate this |
| Ouch. | translate this |
| Ouch - a ko. | translate this |
| Ko - Black could have done better than this! | translate this |
| ... | translate this |
| Three stones are free. | translate this |
| Blah. | translate this |
| Yeah, right... | translate this |
| Yeah, right. | translate this |
| White has sente and Black just two points. | translate this |
| The White territory is open at A. | translate this |
| Black has four points. | translate this |
| Black has at least 3 points. | translate this |
| Black has at least 3 points and a chance to play the endgame move at A. | translate this |
| Black has 5 points and the endgame at A. | translate this |
| Black has 2 points and A. | translate this |
| Black has 3 points. | translate this |
| Black has 5 points. | translate this |
| White to play the most profitable endgame sequence. | translate this |
| It is ko but Black captures first. | translate this |
| Ko and White captures first. | translate this |
| Black lives and has a good move at A. | translate this |
| Black greedily answered White 1 with 2. Punish him. | translate this |
| If adum had played 1, what would MyMaster have done about it? | translate this |
| You have thrown away your only ko threat. | translate this |
| You need another move in the top right. Black wins. | translate this |
| Black lives and wins. | translate this |
| White to play and win (no captures yet). | translate this |
| It's all over for White. | translate this |
| Black is annihilated. | translate this |
| Ko - Black could have done better. | translate this |
| Black is caught in a ladder. | translate this |
| Black to capture two marked stones. | translate this |
| White wins the semeai. | translate this |
| Ko - White could have done better. | translate this |
| Ko. White does not need these complications. | translate this |
| Ko for life - White could have done better. | translate this |
| Ko - and to make it even worse Black takes first! | translate this |
| An easy kill for Black. | translate this |
| White to live on the side - the first move is the key. | translate this |
| White lives and Black is demolished. | translate this |
| Now Black must fight a ko to live - not good enough. | translate this |
| Upper right is alive, but can you save the lower left now? | translate this |
| This move removes the aji of E7 thus making it impossible for Black to win. | translate this |
| Upper right dies. | translate this |
| Black to live unconditionally with his groups in upper right and lower left. | translate this |
| White is safe and Black lives with a part of his group. | translate this |
| White connects out but in gote while Black lives with the main part of his group. | translate this |
| White can choose between playing the ko at A or connecting out while Black can live. | translate this |
| This leads to ko. | translate this |
| See the path White A, Black B, White C. | translate this |
| White to play. Can White save his stones in sente? | translate this |
| . | translate this |
| Black lives with a part of his group. This was not necessary. | translate this |
| Black has answered White 1 with 2. What should White do? | translate this |
| Black dies, but you've left unnecessary aji and liberties. | translate this |
| Why play ko? | translate this |
| Letting Black connect isn't so special. | translate this |
| Black can now choose to live in the corner. | translate this |
| A greedy Black responded to White's push of 1 by blocking at 2. What should White do now? | translate this |
| This move, 127 in the game, is arguably the most famous move in the history of Japanese go. On seeing this move Gennan's ears flushed red. A sign that he had been upset and might not have seen this move coming. Black 127 might not immediately give Black the lead on the board but psychologicaly it must have been a heavy blow. It expands Blacks moyo at the top, erases much of White's influence on the right, offers assistance to the four Black stones below and aims at invading the left side. It radiates influence all over the board. If White answers at A, Black B nicely links up all his stones. If E, Black invades at F. The four stones are now too small to worry about. In the game Gennan exchanged I for J before playing K. In retrospect Gennan should have played at Z before playing the marked move. | translate this |
| The 'logical' approach. White's shape is quite okay on the lower side as A is not sente for Black, hence White can aim at B. (A would be sente if Black got the peep at P. One of the reasons White played Q was to prevent Black from getting this peep.) Also White can be satisfied with getting the large moves at 4 and 6. Overal this result is not that interesting for Black as Q still has some aji. | translate this |
| This is downright bad for Black. | translate this |
| Black 1 and 3 are very big but White's attack in the center would be severe. This is not good for Black. | translate this |
| Shusaku got caught in an unfamiliar version of the taisha and barely got away with it. The game has reached an important stage and Gennan just played the marked stone. How did Shusaku respond? | translate this |
| Gary hane's at 1. What is the best response? | translate this |
| A Black connection at A at any point now creates two eyes. (Incidentally, if White plays at B next, Black will still play at A, and can then play back at A1 to make to eyes at any point.). | translate this |
| White can't make this into a true eye. | translate this |
| Black lives... | translate this |
| Black could even tenuki. (But if White wins the ko, the Black group is dead.) | translate this |
| Black could even pass and play around a bit. | translate this |
| Hmm. | translate this |
| Okay - kill it, then. | translate this |
| Heh - going for the impossible. | translate this |
| It doesn't work this way. Black kills. | translate this |
| So close, and yet... how? | translate this |
| Black C3 is the correct one - or else it's seki sente for White! | translate this |
| Seki. But you shouldn't just give away points! (You gave away 1 point - the prisoner.) | translate this |
| Seki. (You still gave away a point.) | translate this |
| Okay, why give up points for nothing? | translate this |
| Correct! But Black doesn't have the luxury... Play at S and have some fun... | translate this |
| Black got rid of the intruder. | translate this |
| White passes. Play at T. | translate this |
| White answers at O. | translate this |
| Play K for Black's ko threat. | translate this |
| Play K5! | translate this |
| Nope, the correct answer is 1. | translate this |
| How many ko threats (more than the Black), does White need to kill the intruder? (R2 is the intruder.) | translate this |
| Short, and to the point, I hope. Does this 1) kill (K) the White marked group. 2) Is either captured or creates a seki (S) depending on the amount of ko threats. 3) is a wasted move, and White should tenuki (T)? | translate this |
| Black captures three stones. | translate this |
| No effect on White. | translate this |
| Black plays the marked stone and White hastily responds with his own marked stone. How should Black punish? | translate this |
| White is alive unconditionally. | translate this |
| NOPLAY. | translate this |
| Ko fight only. | translate this |
| White is dead (damezumari). | translate this |
| White to defend her group unconditionnally. | translate this |
| How can White connect? | translate this |
| White throws in at 1. What should Black do? | translate this |
| How to save the marked stones? | translate this |
| Note: other Black replies of X, Y and Z, are not considered here. | translate this |
| This move is not necessary. Follow the other path to see why. | translate this |
| Does White need a move to win the race? Play at A if you think yes, or tenuki at T. | translate this |
| How to answer the Black hane? | translate this |
| Now White will live. | translate this |
| Correct. D1 Creates a false eye. And if White responds at F2, a big snapback. | translate this |
| Correcto mundo! Now White can't create 2 eyes. | translate this |
| Black cannot push at A. | translate this |
| Black gets weaknesses this way. | translate this |
| Not best shape. | translate this |
| White gets some shape. | translate this |
| Cannot enclose White now. | translate this |
| Without the throw-in to start, White cannot be enclosed. | translate this |
| Wrong direction: better to enclose White on the bottom side. | translate this |
| White cannot be enclosed now. | translate this |
| White cannot be enclosed. | translate this |
| How to enclose White on the bottom? | translate this |
| White avoids seki. | translate this |
| Does White have anything on the left? Play there if you think yes, otherwise tenuki at T. | translate this |
| This is a classic problem. Black needs to find a way to connect his stones by utilizing White's bad aji. | translate this |
| Both marked spots would be self-atari for White. | translate this |
| Double ko, you cannot win both. | translate this |
| What a tasty cookie! | translate this |
| 10,000 year ko. | translate this |
| 1,000 year ko. | translate this |
| Black has a single eye because of the throw in at A. Nice job. | translate this |
| Black has a single eye because of the throw in at A. Understand, the goal is Black to play and live. | translate this |
| Too easy! | translate this |
| White cannot do anything against the Black group. | translate this |
| Seki! A strange one, but seki anyway. | translate this |
| And now, where to find your ko threat ? :p | translate this |
| And now, where to find your ko threat? Next move, play at A5 to capture or connect and capture later. You lose. | translate this |
| You lose. | translate this |
| White could not do anything against the middle Black group. | translate this |
| Let's see how you can defend your group now. | translate this |
| Can White kill the Black group on B4? Play on Y(es) or N(o) to start. | translate this |
| Cleanly killed. | translate this |
| This is not a seki because White's main group is not connected to the liberty at A1. | translate this |
| Ko. White is your daddy. | translate this |
| Notice that Black has the small ko threat at A. | translate this |
| Black loses one extra point and gives White a ko threat. | translate this |
| A free point and threat for White. | translate this |
| Seki, one point each. Inferior to correct variation; White loses one point compared to the solution but gets a ko threat at A. White chose to play A2 instead of D1 because having an extra ko threat is worth more than the one point White loses here. | translate this |
| White could have the same result as in the solution but instead keeps the extra threat when Black allows White to. So White would not play this now. | translate this |
| 10000 year ko. White may ignore Black's threat and play at C2 or D1 to start a direct ko for life. | translate this |
| Black to play. Both sides need to get a small ko threat from here for some ko somewhere else. | translate this |
| C7 is no good for White - a loss by 1. | translate this |
| Both players need a defensive move and White wins the ko at A1 - Black loses by 4. | translate this |
| Black loses by 7. | translate this |
| Black loses by 2. | translate this |
| Black and White both need to add a defensive move. White will win the potential ko at A1 so Black loses by 4. | translate this |
| Black needs to add a defensive move (eg. A) while White needs to add moves at B and C. Black wins the ko at D but loses by 2. | translate this |
| Both players need to add a defensive move. Black loses by 7. | translate this |
| Black will die. | translate this |
| Black D1 would usually be better placed at C1, but as the variation shows, in this particular situation White is unable to play the ko by replying at C1 herself. | translate this |
| White can do no better than a loss by 1 if she plays C1. | translate this |
| Black loses by 2 after playing A. White must add stones at B and C. | translate this |
| After Black A White must add stones at B and C. Black loses by 2. | translate this |
| Both need to add another move. Black loses by 7. | translate this |
| Black needs to add another move and loses by 7. | translate this |
| Black loses by 4. | translate this |
| White still needs to add a move at A but Black will lose by 2. | translate this |
| After Black plays A White will still need to play B and C but Black loses by 2. | translate this |
| Black will lose by 3 after the sequence 1-4. | translate this |
| Black loses by 3 after the sequence 1-3. | translate this |
| Black loses by 3 after the sequence 1-4. | translate this |
| After Black A White still needs to add stones at B and C. Black loses by 2. | translate this |
| Black needs another defensive move and White must add a stone at A. Black loses by 7. | translate this |
| Black needs to add another move; he loses by 7. | translate this |
| Black loses by 15. | translate this |
| White needs to play at A. Black loses by 3. | translate this |
| Black loses by 2 after playing A. | translate this |
| A big loss for Black. | translate this |
| Black needs to add another defensive move and loses by 7. | translate this |
| Black loses. | translate this |
| Black loses by 3 after connecting at A. | translate this |
| Not tesuji - Black loses by 2. | translate this |
| Black must abandon the E2 group and loses by 3. | translate this |
| Big loss for Black. | translate this |
| Black still needs to play A. He loses by 2. | translate this |
| Black loses by 5. | translate this |
| Black needs to add another defensive move so loses by 7. | translate this |
| White will move at A next while Black needs to add another defensive move. He loses by 7. | translate this |
| Black loses by 5 after playing A. | translate this |
| If Black A then White B, Black will lose by 5 after playing C and D. | translate this |
| White can't afford to play D5 - she loses by 5. | translate this |
| This path isn't tested but would also be jigo. | translate this |
| Black must defend at A and B while White also needs a defensive move. Black loses by 2. | translate this |
| Black dies, he will be unable to play at A1 or E1. | translate this |
| Black dies, he is unable to push at A3 or E1. | translate this |
| Black needs to add two defensive moves and White one more. Black loses by 1. | translate this |
| Both need to add another defensive move. Black loses by 2. | translate this |
| Both need to add another move. Black loses by 2. | translate this |
| Black needs to add 2 defensive moves and White 1 more. Black loses by 2. | translate this |
| Both sides need to add another defensive move. Black loses by 2. | translate this |
| Both sides need to add another move. Black loses by 2. | translate this |
| Both sides need another defensive move. Black loses by 2. | translate this |
| Black needs 2 more defensive moves and White 1 more. Black loses by 2. | translate this |
| Black has no ko-threat after White C7. Following the sequence 1-6, Black loses by 22. | translate this |
| White can't afford to push at A5 due to playing at D1 instead of C1. Black lives in the sequence 1-6 but loses by 19. | translate this |
| Black has no ko threats. He loses by 7. | translate this |
| White needs additional moves at A and B later. Black loses by 5. | translate this |
| Black's E2 group is captured. He loses by 8 after playing A. | translate this |
| White will play A next and Black needs to add a defensive move. Black loses by 9. | translate this |
| Black needs to add a defensive move. He loses by 9. | translate this |
| Black loses by 5 after the sequence 1-5. | translate this |
| After Black A White needs to add stones at B and C. Black loses by 4. | translate this |
| Black will lose by 8. | translate this |
| After Black A White must defend at B and C. Black loses by 2. | translate this |
| After Black A White must defend at B and C. Black loses by 4. | translate this |
| White still needs to play A and B. Black loses by 7. | translate this |
| Black's E2 group is caught. With the continuation 1-9 Black loses by 3. | translate this |
| Black needs to add 2 defensive moves and White needs to add 1. Black loses by 1. | translate this |
| Black loses by 8. | translate this |
| Black needs to play a defensive in addition to E1 and White also needs a defensive move. Black loses by 4. | translate this |
| White must add a stone at A. Black loses by 7. | translate this |
| Black loses the E2 stones. With the sequence 1-7 he loses by 3. | translate this |
| Black must add a defensive move in addition to E1. He loses by 3. | translate this |
| White can connect at A or B, so Black dies. | translate this |
| Black will lose by 8 after the sequence 1-7. | translate this |
| Black needs to add a defensive move in addition to E1 and White also needs a defensive move. Black loses by 4. | translate this |
| Black must add another defensive move. He loses by 8. | translate this |
| Black must add a defensive move. He loses by 10. | translate this |
| Black loses by 4 after the sequence 1-3. White must come back to play A and B later. | translate this |
| White would also be unable to play C7 now if D1 was at C1. Black lives with the sequence 1-8 but loses by 16. | translate this |
| This move at C7 would also not be possible if D1 was at C1. Black lives with the sequence 1-8 but loses by 16. | translate this |
| This move is another disadvantage of Black D1 over C1. After the sequence 1-8 Black loses by 7. | translate this |
| Black needs to add a defensive move in addition to E1. Black loses by 3. | translate this |
| Note Black D1 is usually better placed at C1 because White may be able to start a ko by playing C1 herself. In this particular situation the ko is not good for White. | translate this |
| White needs to add stones at the marked points and Black needs a defensive move in addition to A2. Black loses by 8. | translate this |
| Black loses by 6 after the sequence 1-4. | translate this |
| Black loses by 9 after the sequence 1-6. | translate this |
| Black loses by 4 after the sequence 1-5. | translate this |
| Black needs to add a defensive move in addition to A2, while White must play the marked points. Black loses by 8. | translate this |
| White wins the ko so Black must submit with 1-4. He loses by 6. | translate this |
| Defensive moves are needed at A and B. Black loses by 7. | translate this |
| Both sides need to add a defensive move. Black loses by 2. | translate this |
| Both sides need to add a defensive move. Black loses by 4. | translate this |
| Both sides need to make a defensive move. Black loses by 7. | translate this |
| Black must submit with 1-5. He loses by 7. Black at 3, White at 1, Black at E6 leads to the same result. | translate this |
| Black's E2 group is dead, the sequence 1-7 (or similar) makes best use of their aji, Black loses by 3. | translate this |
| Not tesuji. Black must play submissively at the top allowing White to capture at 4. Black loses by 7. | translate this |
| Black loses by 3 after defending at A. | translate this |
| Black needs to add a defensive move in addition to A2 while White needs to add stones at the marked points. Black loses by 9. | translate this |
| Both sides need to add another move. Black loses by 8. | translate this |
| White needs to add another move. Black loses by 9. | translate this |
| A big loss for Black who needs to play A soon. | translate this |
| Black loses by 6 after defending at A. | translate this |
| Black loses by 7 after White defends at A. | translate this |
| White B1 is too greedy. Black wins by 2. | translate this |
| Both sides need to add another move. Black loses by 6. | translate this |
| Black needs to connect at B1. He loses by 6. | translate this |
| Black must abandon the E2 group. He loses by 8 after the sequence 1-4. | translate this |
| Black must abandon the E2 stones. After the sequence 1-5 he loses by 7. | translate this |
| Not tesuji. Black loses by 6 with the sequence 1-5. | translate this |
| Big loss for Black who needs to play A to live. | translate this |
| Black loses by 6 after the sequence 1-5. | translate this |
| Black looks to have lost by 10 but he can force White to fill an extra point of territory (see the variation for this White move at C1 for one possible continuation). | translate this |
| Black loses by 9. | translate this |
| Black loses by 7 after 1-5. | translate this |
| Black loses by 6 after playing A. | translate this |
| Black loses by 7 after defending at A. | translate this |
| Both sides need to add a defensive move. Black loses by 7. | translate this |
| Both sides need to add another move. Black loses by 4. | translate this |
| Black loses by 8 after both sides add another defensive move. | translate this |
| Also a loss by 7 for Black. | translate this |
| This is also a loss by 7 for Black. | translate this |
| After Black A he loses by 3. | translate this |
| Black needs to add a defensive move and White needs to play the marked points. Black loses by 9. | translate this |
| Both sides need another defensive move. Black loses by 8. | translate this |
| Both sides need to add another move. Black loses by 7. | translate this |
| Black dies everywhere. | translate this |
| White will get the entire lower right. | translate this |
| Black must play at 1 next to live. He loses by 18. | translate this |
| Black needs another defensive move. He loses by 10. | translate this |
| Black needs another defensive move. He loses by 12. | translate this |
| Both sides need another move. Black loses by 13. | translate this |
| Both sides need to add another move. Black loses by 9. | translate this |
| Both sides need to add another move. Black loses by 11. | translate this |
| Black needs to add another move. He loses by 10. | translate this |
| Black loses by 8 after the sequence 1-4. | translate this |
| Black must play A to live; he suffers a big loss. | translate this |
| Black suffers a big loss after the sequence 1-8. | translate this |
| Black must submit with 3 and 5 to live. | translate this |
| Both sides need another move. Black loses by 7. | translate this |
| Both sides need another move. Black loses by 9. | translate this |
| Black still needs another move. He loses by 10. | translate this |
| Black must play A next to live. He suffers a big loss. | translate this |
| Black loses by 8 after the sequence 1-7. | translate this |
| A big loss. Black must play A next. | translate this |
| A big loss. | translate this |
| Black helps White to remove his aji. Black loses by 7 after 1-4 or similar. Although White could exchange A for B, Black is unable to pull out the stone at A since White could then play at 1. | translate this |
| White takes the entire corner. Black loses by 3 after the sequence to 10. White 1 and 3 both threaten to cut directly or atari at G2 followed by C1. | translate this |
| White controls the right side. Black loses by 7 after the sequence 1-6. Even if Black exchanges A for B White will be able to play at 3 if he tries to stop White getting 4 later. The sequence Black A, White B, Black C is not playable for Black - White can reply at 3. | translate this |
| Black needs to make 2 defensive moves and White 1. Black loses by 1. | translate this |
| Black needs a defensive move in addition to E1 and White also needs another move. Black loses by 4. | translate this |
| Black D1 is usually better placed at C1 to avoid the possibility of White getting ko by playing C1 herself. In this particular situation the ko is no good for White. | translate this |
| Black has no ko threats. He plays A while White plays B then C. Black loses by 9. | translate this |
| Black needs 3 more defensive moves and White needs 1. Black loses by 1. | translate this |
| After Black A White still needs to add stones at B and C. Black loses by 4. | translate this |
| Black has no ko threats. After the sequence 1-4 he loses by 6. | translate this |
| White plays A and Black loses by 7. | translate this |
| Black needs to add 2 moves and White needs one more. Black loses by 1. | translate this |
| Black needs to add a move in addition to E1 and White also needs to defend. Black loses by 4. | translate this |
| Black loses by 3 after 1-7. | translate this |
| Black needs to add a defensive move in addition to E1. He loses by 3. | translate this |
| Black loses by 8 after 1-7. | translate this |
| Black loses by 4 after 1-6. | translate this |
| Black barely lives. He loses by 16. | translate this |
| Black barely lives. He loses by 16 after 1-8. | translate this |
| Black D1 would be better at C1 since White can play C1 herself to make ko. In this particular situation the ko isn't good for White. | translate this |
| The E2 group is caught. Black loses by 3 in the sequence 1-9 or similar. | translate this |
| Black loses by 7 after White A. | translate this |
| Black can force White to fill an extra point of territory (see variation for this move at B) so he loses by 9 rather the 10 if he simply defends at C while White plays A and B. | translate this |
| Black loses by 12. | translate this |
| Black has no ko-threat. He loses by 8 after 1-4. | translate this |
| White takes the lower right. Black loses by 3 after the sequence to 10. | translate this |
| Black needs to add two defensive moves and White also needs another move. Black loses by 1. | translate this |
| Black loses by 2 after 1-6. | translate this |
| Black needs to add two moves. He loses by 3. | translate this |
| Black loses by 3 after 1-9. | translate this |
| Black loses by 10 after 1-7. | translate this |
| Black needs to add two more moves. He loses by 3. | translate this |
| Black loses by 7 after 1-10. | translate this |
| Black loses by 11 after 1-4. | translate this |
| Black must submit with 3 and 5 to live. He loses by 16. | translate this |
| Black loses by 7 after 1-8. | translate this |
| Black loses by 10 after the sequence 1-7. | translate this |
| Black dies. He can't cut. | translate this |
| Black needs two more defensive moves. He loses by 3. | translate this |
| Black D1 is better placed at C1 so White can't make ko by playing C1 herself. In this particular situation the ko is bad for White (see variations at C1). | translate this |
| Black wins by 2. | translate this |
| Black wins by 1. | translate this |
| White seems to be ahead. Find Black's best result (No komi, no prisoners, Japanese Rules). | translate this |
| Seki. Not enough. | translate this |
| A win, but only by 1. | translate this |
| You won by 2; only second best. | translate this |
| You won by 3; the best result. | translate this |
| Only jigo. | translate this |
| If Black can win by three points by going first, just play an endgame move. If White can win by three points by going first, play at W. | translate this |
| This ko is best for both. (Navigate solution for details.) | translate this |
| Ko, White takes first. Black cannot crush at Q1. | translate this |
| This is a mistake for Black. | translate this |
| Ko, White takes first. | translate this |
| Black cannot approach. | translate this |
| This helps White get good shape. | translate this |
| White returns to finish this joseki. | translate this |
| White cannot save both this stone and the four stones to the left. | translate this |
| Connecting along the bottom is small compared to fixing the outside. | translate this |
| Correct first move. Now, the follow-up? | translate this |
| This is actually better for White. Let Black capture two stones. Still, overall this favors Black. | translate this |
| White plays at 1. How should Black respond? | translate this |
| Black successfully exploits the aji at A by creating a shortage of liberties for White. | translate this |
| Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for White. | translate this |
| White is forced to sacrifice to save the marked stones, due to the potential shortage of liberties created by Black at F8. | translate this |
| Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for White. The marked stones are dead. | translate this |
| White is down on points so he must resort to drastic measures: he plays at L2 to limit the eyespace of, and kill, the marked Black stones. How can Black punish White? | translate this |
| The corner is safe. | translate this |
| This was game. White lives. | translate this |
| This is the strongest attempt. | translate this |
| Note that this collapses. | translate this |
| A simple ko is not good enough. | translate this |
| Black has 2 eyes, hence it's alive. (White can't deny him from having 2 eyes, as to do so, he needs to play both at A and B - They're miai.) | translate this |
| Black is alive. (2 eyes.) | translate this |
| 2 locations; can give life. | translate this |
| Is this a joke? | translate this |
| T stands for tenuki. | translate this |
| Black passes. By this move, White gives away a point. But more important - he gives away sente! (T at G5.) | translate this |
| Black has 2 eyes, hence it's alive. (White can't deny him from having 2 eyes. Don't believe me? Go ahead, and try to kill.) | translate this |
| Nice. Black is dead. (It won't be having 2 eyes now, since he needs to play at both A and B to acquire them. They're miai.) | translate this |
| Black is dead. (Won't be having eyes, now.) | translate this |
| This move kills. | translate this |
| Black is alive. (2 eyes. X isn't part of the eye, as Black will fill it when White plays at J4.) | translate this |
| Both locations can give life. But J3 is better, since it reduces the territory of the opponent.) | translate this |
| Black is alive. (2 eyes.) (J1 is captured, but it doesn't matter.) | translate this |
| All 3 locations can give life. But J3 is the best, since it reduces the territory of the opponent. | translate this |
| Black is dead. Nice. | translate this |
| Nice. Snapback. | translate this |
| Black is dead, nice. (Won't be having 2 eyes now.) | translate this |
| Obviously dead. | translate this |
| 3 locations can give life. | translate this |
| Black has 2 eyes, hence it's alive. (White can't deny him from having 2 eyes, as to do so, he needs to play both at A and B after an approach at C - impossible.) | translate this |
| White's dead. (A and B are miai.) | translate this |
| White's dead. (A and B/C are miai.) | translate this |
| White's dead. (A,D or A,B or B,D or B,C are miai.) | translate this |
| White's dead. (A,C or B,C are miai.) | translate this |
| Obviously wrong. Black can kill in 4 ways. | translate this |
| Is the marked group - 1) Dead (D - C5) as it stands. 2) Killable. (Kill it then.) 3) Alive (A - G5) no matter what? | translate this |
| The marked stone prevents a ko at B9, so it's a seki and Black wins by 2 points! | translate this |
| Suicide?! I mean... where can you see a ko threat?! | translate this |
| *cough* | translate this |
| Dead... | translate this |
| Total failure! Now either 1 or 2 are dead! | translate this |
| Doesn't work... | translate this |
| Correct! With the marked stone there is no ko threat! White can't approach in the upper left now! Black can get Seki and win with 2 points. | translate this |
| Bad! Black lost. | translate this |
| O_____________O | translate this |
| Now be careful! | translate this |
| White lost. | translate this |
| Wrong! | translate this |
| Nah, you can't ignore this move either! | translate this |
| How can Black answer this stone? | translate this |
| Correct! The marked stone is very important! It prevented the ko at A9... | translate this |
| You lost group 1... | translate this |
| You lost group 2... | translate this |
| Choose your way of defeat! | translate this |
| Dead! ;) | translate this |
| What now? | translate this |
| Black lost! | translate this |
| Black must play 1! Otherwise it'll lose the ko. Even if the upper part is seki, Black wins by 2! | translate this |
| You lost! | translate this |
| Didn't think of that one, but of course it prevents the ko threat too! | translate this |
| Bad! Black can't be greedy here. | translate this |
| Rather weird shape but it lives. | translate this |
| Auto atari. | translate this |
| Seki. This time at the bottom. However, Black wins with 5 points! | translate this |
| Bad! Black's greediness kills the whole group! | translate this |
| White's trick was sucessful. | translate this |
| Black must respond correctly. | translate this |
| Nah, you cannot ignore three moves! | translate this |
| Dead! Black cannot do anything here... | translate this |
| Black wins by 2 points. Black must pass. A9 isn't possible. Black cannot gain full life! | translate this |
| Euhm. Nope! | translate this |
| Lol. | translate this |
| Just dead. | translate this |
| Seki = boring. | translate this |
| Same procedure! | translate this |
| Play at A to start the problem. | translate this |
| Assume ladders work for White. Connect Black... | translate this |
| Now White cannot make a ko, and it is a dead shape inside. | translate this |
| That first exchange is a little bad, but okay, it's still dead. | translate this |
| How to kill these White stones? | translate this |
| Catch the marked White stone... | translate this |
| And White wins by a point - nice ;) | translate this |
| Jigo (tie). Why did you play at B6 instead of A5? It cost you a point. | translate this |
| Correct. Black can't do more damage, for now, since he can't approach at A5. (And in some cases, it can help you make an eye - remember it.) | translate this |
| Jigo. Could be a bit better. | translate this |
| Black gets to take away another point... | translate this |
| Black wins by 9 moku! | translate this |
| You lost points unnecessarily... | translate this |
| White clearly lost - A6 is captured (can't escape) and White's territory has been reduced. | translate this |
| Black could capture A6 as it's in an atari, but B7 is better as it reduces the White territory even more. | translate this |
| White clearly lost - A6 is captured (can't escape, nor can it make life) and White's territory has been reduced. | translate this |
| This is wrong, since A5 is captured. (Don't believe me? See for yourself.) | translate this |
| What's the correct way to deal with A? (No komi.) | translate this |
| How to connect the Black groups? White's shape doesn't look good. However, Black only has 3 liberties. | translate this |
| Ko. (Normally Black wouldn't play the internal ko threats immediately though.) | translate this |
| White dies without even a ko. | translate this |
| If Black is strong on both sides this way of playing is possible. | translate this |
| If Black is strong on the left side this way of playing is possible. | translate this |
| Please see next problem for how to continue. Please note that Black has another move in certain circumstances. | translate this |
| White is better off than in the solution. | translate this |
| White has the same tesuji as seen in the next problem. | translate this |
| Now you can play with the options. | translate this |
| Wrong. After getting the correct answer, you can explore options. | translate this |
| How many first moves kill this group? Click on the number. | translate this |
| Jigo! Black E2 is answered with White F1, so there is no need for White to add a stone there. | translate this |
| Black wins by three points. | translate this |
| ...and White connects the ko. Black wins by two points. | translate this |
| Black lives but has lost territory. | translate this |
| Is Black's territory safe? If you think so then play at A, otherwise strengthen Black's region as necessary. | translate this |
| No way. Black gets everything. | translate this |
| White cannot atari from the right side because of a shortage of liberties, and the Black corner has one eye, so the White group on the side is dead. | translate this |
| Black loses the corner; he can only eat the S10 group. | translate this |
| This is what happened in the real game... | translate this |
| Black has to save the corner. | translate this |
| White has cut and now escapes. | translate this |
| Black can get a lot more. | translate this |
| White cannot play M1 and Black is connected. | translate this |
| White cannot connect at M1. | translate this |
| You did not need a ko threat to connect. | translate this |
| Play at T (H6) for a small ko threat. | translate this |
| The group was safe already, you just wasted a move. | translate this |
| Not big enough. | translate this |
| What if White plays a threat like this? | translate this |
| You did not need a threat to connect. Now it's too late. | translate this |
| Play at T (H6) if you think you need a threat. The threat is not very big. | translate this |
| Not big enough; F1 would have been worth at least 4 points. | translate this |
| What if White plays a reasonable threat, like G1? | translate this |
| A difficult ko for White to win, admittedly, but still not unconditional. | translate this |
| Give up now. The best from this is ko. | translate this |
| Black to connect the marked stones to the outside, unconditionally. | translate this |
| This is too close to X. White can now extend to E, or play at F prompting you to overconcentrate by standing at G. | translate this |
| By limiting yourself to a 3 space extension, you leave a possible further extension to E. | translate this |
| C is too far. In response to White's invasion, you have no good extension from your stone at C. | translate this |
| Your position is now very thin, and vulnerable to various attacks. | translate this |
| Which is the best extension: A, B, C, or D? | translate this |
| You should limit your extension to 2 spaces. Had you played 1 space further at B, it would be ineffective against the strong White position to the right, and would invite invasion at I. | translate this |
| Extending to B is ineffective against the strong White position to the right, and has invited a damaging invasion. | translate this |
| Don't play near thickness. | translate this |
| This is much too small. | translate this |
| The 3 space extension is not enough, as White can reply with the good block/extension at L3. | translate this |
| This leaves you the possibility of making a useful further extension to E; or pressing at F then G, raising your extension at K3 to high efficiency. | translate this |
| This extension is too far as it gives White the chance to counter-attack at H4. | translate this |
| This is much too defensive. | translate this |
| This is too defensive, as it does not threaten the stone at Y. | translate this |
| You have allowed White to stabilize her stone at Y, and your thin position on the left now needs defending. | translate this |
| This is a good move because it attacks the White stone at Y, as well as extending from your stone at X. Had you gone any further, it could no longer be regarded as an extension. | translate this |
| You can play one of 4 different right corner positions. Please choose a difficulty from 5k to 8k. | translate this |
| White needs to add one stone in its territory to survive to the potential Black attack. | translate this |
| White cannot atari, but Black can kill E1, so everything is dead. | translate this |
| Black can kill if he wants, so C1 is not needed. | translate this |
| See the navigation option for the details if you don't understand why. | translate this |
| Incorrect. | translate this |
| The White group has how many points? | translate this |
| Black's alive. (He has 2 eyes.) | translate this |
| This is wrong, since, White'll play at F1, denying Black from having 2 eyes. (Would never happen.) | translate this |
| This is wrong because White'll play at G1, making A and B miai for Black to live. (Would never happen.) | translate this |
| The correct thing for Black is to play either of the marked (with circles) locations. | translate this |
| Black's alive. (He has 2 eyes - A and B are miai for White to kill.) | translate this |
| Self atari - this is wrong since White'll play at G2, capturing the H1 group and denying Black from having 2 eyes. (Would never happen.) | translate this |
| This is wrong since White'll play at E1, denying Black from having 2 eyes. (Would never happen.) | translate this |
| This is wrong since White'll play at G2, capturing the H1 group (using a snapback) and denying Black from having 2 eyes. | translate this |
| The correct thing for Black is to play at the marked (with a circle) location. | translate this |
| Black's alive. (White can't deny him from having 2 eyes - to do so, White'd have to play at both A and B : they're miai.) | translate this |
| This is wrong since White'll play at G2, capturing H1 and denying Black from having 2 eyes. (Would never happen.) | translate this |
| Black's dead - A and B are miai. (Would never happen.) | translate this |
| Black's dead. (Would never happen.) | translate this |
| This is wrong, since, a White play at either of the marked locations would kill the Black group. (Would never happen.) | translate this |
| This is wrong, since White'll play at G1, capturing H1 and denying Black from having 2 eyes. (Would never happen.) | translate this |
| This is wrong, since White just set up a snapback and denies Black from having 2 eyes. | translate this |
| Black's dead. | translate this |
| Black tenukied (D5). | translate this |
| Black tenukis (D5). This White move isn't endangering the Black group. | translate this |
| Black's dead. (Won't get 2 eyes, now.) | translate this |
| Black's dead. A and B miai for Black to live. (Would never happen.) | translate this |
| This is wrong, since it's a dead shape. Black has to play at A and B to save himself; they're miai. | translate this |
| Black's dead. A and B are miai for Black to live. (Would never happen.) | translate this |
| This is wrong, since White'll play at 12, capturing H1 and denying Black from having 2 eyes. (Would never happen.) | translate this |
| Wouldn't even a simple move such as G1 demonstrate, Black gaining 2 eyes? | translate this |
| Well done. | translate this |
| Is the marked, group - 1)'D'ead (B5) as it stands. 2) Alive (D5) no matter what. 3) Killable - play to kill. (Note - T at a marked location means tenuki = Local Pass = Non Local Play.) | translate this |
| Black is dead - he can't play A because he is short of liberties. | translate this |
| Now A and B are miai, so Black is dead. | translate this |
| Please kill the Black group! | translate this |
| Apparently a 30k error - see comments ;o) | translate this |
| Black to live. White has just played 1. There are 2 ways to live. | translate this |
| Let's be careful with those White stones. | translate this |
| Correct (thekro's Solution). | translate this |
| Though Black could do better than this. | translate this |
| White: just played the marked stone. Black to live, with some territory. | translate this |
| Capturing the 3 stones in the corner gained White just one liberty, but White needs two moves to connect! | translate this |
| Dead (but only since I added a stone at L17). | translate this |
| Alive, although Black wasted a point with the throw-in at B19. | translate this |
| Black is alive, but White should not be allowed to escape having played C19. | translate this |
| Black can't play at A so White is connected. | translate this |
| Life is easy after the best move from White. | translate this |
| Only one eye and no way to capture White. | translate this |
| Whoops, neatly captured by White... | translate this |
| The marked move would put Black in atari. | translate this |
| Black can't get two eyes. | translate this |
| A and B are now miai for White. | translate this |
| Black E17 would be self-atari. | translate this |
| F19 isn't even necessary; it just shows Black is dead and reduces variations. | translate this |
| I invented this problem 10 years ago in bed, in total darkness. Black to live. | translate this |
| What can White do with the marked stone? | translate this |
| Thanks. | translate this |
| White plays at 1 in the corner. How should Black answer? | translate this |
| Black can't catch these stones. | translate this |
| Black should try to make his stones alive. | translate this |
| Well done ;) | translate this |
| 3rd question - Grr... You and your questions, eh? Kill, it then! (All the way.) (Use K when you need a Ko threat.) | translate this |
| 3 ko's are needed. | translate this |
| 2nd question: How many ko threats does Black need to kill? | translate this |
| It's killable, with the correct amount of ko's. | translate this |
| It's killable, with the correct amount of ko's. (But not dead as it stands.) | translate this |
| 1st question: What's the best Black can get from the upper White group? (Having 4 outside ko threats - each bigger than what it's worth.) | translate this |
| Please see problem 3024. | translate this |
| Ko, there is a better way. | translate this |
| This point is urgent and sente. If Black plays here, White's two stones will be adrift. | translate this |
| Where should White play in this fuseki? | translate this |
| Dead in gote. | translate this |
| Black plays at 1. How can White save his marked stones? | translate this |
| Poor form, but... | translate this |
| White takes the ko in sente. | translate this |
| This is a two step ko. White can do better. | translate this |
| Black gains sente. | translate this |
| Black to die in gote. | translate this |
| White lives... | translate this |
| Black needs to do something in the corner. | translate this |
| Congratulations, the ladder works. | translate this |
| Uh oh, you're playing the Black stones and you just lost a lot of them! The ladder works. | translate this |
| Please respond to White's moves. | translate this |
| Here the 2 players were attempting to make a pretty butterfly shape when this position arose. Question: Does the ladder work? If yes play A. If no play T. | translate this |
| Ko for life, Black needs to find the first ko threat. | translate this |
| Black is dead. White can play at R19 any time and still leave a dead shape. | translate this |
| Black suffers from a shortage of liberties and cannot play at A. | translate this |
| This is not seki; if White removes the outside liberty Black is in atari. | translate this |
| White takes the ko first. | translate this |
| Counting Black A, White B, Black lives with 6 points. | translate this |
| Black loses points. | translate this |
| White can get a seki. | translate this |
| Although Black has only 5 points, Black A and White B cause White to lose a point outside, so Black does not lose points compared to the other solutions. | translate this |
| Black to live in the best possible way. | translate this |
| Can Black live (unconditionally or by ko)? If not, please play at D (dead). | translate this |
| Hey, Black is not totally dead yet! | translate this |
| Black to play. If the group is totally dead, please play at D. | translate this |
| Hey! Black is not totally dead yet! | translate this |
| Excellent job! | translate this |
| Rabbity six. | translate this |
| Correct. Please proceed to make the White group live. | translate this |
| How many starting first moves can White play in order to live? | translate this |
| Please see the previous problem. | translate this |
| White is not dead yet. | translate this |
| Can White live? If not, please play at D. | translate this |
| White's alive! | translate this |
| White's alive! (Each set of A and B is miai to deny an eye.) | translate this |
| A ko isn't a solution when a sure kill is possible. | translate this |
| E17 is bigger than D17 by a point, but leaves an extra ko threat. | translate this |
| E17 is bigger than D17 by a point but leaves an extra ko threat. | translate this |
| E17 is one point bigger than D17 but also provides an extra ko threat. | translate this |
| Guess... ;) | translate this |
| The two White stones on the left are in trouble. | translate this |
| Black is happy with the ponnuki he gets. | translate this |
| This move is the best way to capture Black and connect. If Black plays A White cuts at B. If Black B, White A and he captures the Black stones. | translate this |
| Help White! | translate this |
| A bad way to fix. The peeps on both sides leave good moves for White. | translate this |
| That helps White! | translate this |
| This pincer is too early: first Black should hurt White's shape on top. | translate this |
| White made the mistake of exchanging 1 for 2. How should Black take advantage? | translate this |
| No chance of a second eye. | translate this |
| White tries hard to live... | translate this |
| Black can't win anymore. Even if Black wins the ko, he loses by 0.5 points. | translate this |
| Black wins by 0.5 Points. White has to capture at A and B as well as to connect at C. Black must not force White to capture any of these stones by ko threat. | translate this |
| Black wins by 0.5 Points. White has to capture at A, B and C as well as to connect at D. Black must not force White to capture any of these stones by ko threat. | translate this |
| You lose by 0.5 points. | translate this |
| You lose by 1.5 points. | translate this |
| Black to win the game. Can you win the ko? | translate this |
| White captures 7 stones. The position ends equal. Black has not gained anything by starting the ko fight at this stage. Whatever variation is used, the result is the same. | translate this |
| Black saves her corner. | translate this |
| Please play at C. | translate this |
| Black captures 7 stones. | translate this |
| White saves her corner. Now play at B please. | translate this |
| As the corners stand there is no gain to be had by Black in starting the ko fight, as the result ends equal, therefore Black tenukis. | translate this |
| Can Black acheive any gain by starting the ko fight at this stage? If you think so play at A. If not, play at T. | translate this |
| Correct. Now you can explore. | translate this |
| Wrong. After you get the right number, you can see why. | translate this |
| How many ways to kill? (no ko). | translate this |
| Black has made profit in the corner, and kept sente. This is the lowest price White pays for not completing the joseki at A. | translate this |
| A bad ko for White. | translate this |
| White lives, but loses part of the group. | translate this |
| If Black does not want ko... | translate this |
| Best defense for White following Black A. | translate this |
| You lost by 1 point! Could be better. ;) | translate this |
| Yup, White wins by 1 point :) | translate this |
| Obviously, it's even worse for Black ;) | translate this |
| Black will play at J7 to minimize the damage. (J5 is included to show what happens if Black takes the snapback. It won't be played out by the app.) | translate this |
| Common. Do your best! (NO KOMI.) | translate this |
| That's the correct number. Now, two of the correct moves are A and B. Where is the third? | translate this |
| Incorrect. After you select the correct number you may explore. | translate this |
| Click on the number that corresponds to how many first moves kill this group without ko. | translate this |
| This is a ko and a failure for Black if White has good enough ko-threats. | translate this |
| Not the best, but... | translate this |
| Black can do much better. | translate this |
| Black to punish White. | translate this |
| You won by 7 points. You failed! Why do you always have to win?! Guh ;) | translate this |
| Aww... You lost by 1 point... What a shame... | translate this |
| Hm... White won... By 19 moku... | translate this |
| You, won by 9 points... You failed! Why do you always have to win?! Guh ;) | translate this |
| Nice! ;) | translate this |
| You managed to lose. WOW!!! And by 18 points... I'm impressed. | translate this |
| Well done! ;) | translate this |
| Black wins by 5 point - should never happen, as White doesn't want to lose, and would play F2 instead of H1. | translate this |
| Black still wins by 9 - White would never let it happen. And play at F2 instead of H1. | translate this |
| White would always play at F2 here, as playing at H1 would make him lose. (I only added it as an option to show to those who're wondering why.) | translate this |
| You let White win by 17? Why did you prefer saving one point instead of a whole group? o.O | translate this |
| My turn to say it - Get a Jigo! (Tie; No komi.) | translate this |
| Nice! (Black won 2 points out of this sequence. And wins by half a point!) | translate this |
| Black has no threats... Therefore the marked group dies, and Black loses... | translate this |
| Ko. (Black wins the ko, and lives with 6-4=2 points - The best solution! - White'll play his biggest threat, worth 4 points, Black can ignore, and win 2 ;) | translate this |
| Seki. (Black gets 1 point out of the sequence - the prisoner. And White wins by 0.5!) | translate this |
| Seki. (Black gets 1 point out of the sequence, and so does White - the prisoners. And White wins by 1.5!) | translate this |
| Black's dead. (Can't get 2 eyes. And Black loses shamefully.) | translate this |
| Black lives. (BUT, he lost 2 points - Both Black and White have 2 points of territory. But White also has 2 prisoners. White wins by 3.5!) | translate this |
| Black lives. (But he lost 2 points - both Black and White have 2 points of territory. But White has 2 prisoners.) | translate this |
| Black lives with 7 points! What a shame that White wouldn't let this happen, eh? I mean, you'd win by 6.5... It'd be nice, eh? ;) | translate this |
| Wouldn't ever happen... | translate this |
| White would always play at G2 here, as it's much better for him. | translate this |
| Seki. What a shame it'd never happen? Dunno... After all, seki isn't the best solution. | translate this |
| And White plays... | translate this |
| This would never happen, because... | translate this |
| White would always respond at G2, as it's clearly better for him. | translate this |
| The marked group dies, and Black loses the game. | translate this |
| White just played at A: how to respond? (Komi = 0.5) | translate this |
| Try again. | translate this |
| Please carry on. At all times please do not play at A, I have no variations for that. | translate this |
| Choose W if you think Black can win the capturing race unconditionally, L if you think Black will lose the capturing race unconditionally, K if you think the result is a ko. | translate this |
| You win by 0.5 points! | translate this |
| You can catch the group in the upper left corner, but your right group is dead. | translate this |
| This is not a ko threat. | translate this |
| Your left group is dead. | translate this |
| No more ko threats. | translate this |
| You lose by 4.5 points. | translate this |
| Don't try to kill Black; after J9 he has 2 eyes. | translate this |
| Black has just played the marked stone. White to play and live. | translate this |
| A good, ole-fashioned life and death problem. Please abacinate Black. | translate this |
| Bent four in the corner is dead. | translate this |
| Big gain by Black. | translate this |
| White cannot win this ko. | translate this |
| Black wins by 0.5. | translate this |
| If you do not think D17 is needed, play Q18. | translate this |
| Please fill the F8 ko rather than the F5 ko. | translate this |
| Not actually wrong, but it is equal to the initial situation and I was too lazy to do all the (same) variations from this point over again :-) | translate this |
| You won by 1 point. Open ended Black plays (or White plays that prevent them) such as 'B-D', are more valuable than dead end gote plays such as C8. The greater the number of further moves an open ended play has, the better it is. Black D was the only first move that could win. | translate this |
| No komi, no prisoners yet - Black to win. | translate this |
| Good move! The Black answer is forced. What next? | translate this |
| Try to save White. | translate this |
| Wow! You are strong! | translate this |
| The first move is the key to solving this problem. (As the name implies, with S2, the group changes from a snake to a dragon.) | translate this |
| If Black plays at S1, he will win because of his eye. If White plays there, Black T3 kills. | translate this |
| Too little eyespace left. | translate this |
| Variations by zinger. A thousand thanks. | translate this |
| Congrats! The White mountain falls due to lack of liberties. | translate this |
| A variation by zinger. Thanks to zinger. | translate this |
| The five tigers failed in their attempt. | translate this |
| The tigers still die... | translate this |
| The group at S7 is the five 'tigers' while White is the 'mountain' they are trying to invade. Can they succeed? It's all up to you. | translate this |
| The emperor starts his tour from the marked stones. Thanks to Spirit for spotting a mistake. | translate this |
| *Four* stage ko, White takes first, not bloody likely; also, S18 was White's mistake. | translate this |
| Q17 was White's mistake. | translate this |
| T19 was White's mistake. | translate this |
| R17 was White's mistake. | translate this |
| This is what igowin did to me, its live-group algorithm seems weak compared to human logic. | translate this |
| Black to administer coup de grace. | translate this |
| Solved. | translate this |
| Black to break free. | translate this |
| Only this move saves the Black stones. | translate this |
| How should Black connect his stones out? | translate this |
| Well done! White is dead. There is no seki. | translate this |
| Seki, White lives. | translate this |
| Damezumari. Black cannot connect. | translate this |
| White is alive, at best Black can get a seki here. | translate this |
| Great stuff! | translate this |
| Both eyes at the top are false. | translate this |
| Black can aim at the ko at A. If White prevents it by playing B, Black can be satisfied with his thickness and connect at C or D. | translate this |
| Playable, but Black can probably do better. | translate this |
| Black can now hane at A or B and get a good result. Please note that the points marked x threaten to kill the corner. | translate this |
| Correct. The ladder doesn't work. | translate this |
| Black has three liberties. Failure. | translate this |
| Black has four liberties. Failure. | translate this |
| Does A work? If yes, play it, else play B. | translate this |
| The ladder actually works... | translate this |
| Three liberties. Failure. | translate this |
| Four liberties. Failure. | translate this |
| The dead Black stones stay dead, and the marked Black stones must escape in gote (at A) to live. | translate this |
| The dead Black stones stay dead, and the marked Black stones must escape in gote (at A) to live. This is probably Black's strongest sequence (try again for variations). | translate this |
| White's defense of the corner is an overplay, and allows Black's marked stones to escape. White can do better. | translate this |
| Black got greedy in the corner and White nets the additional marked stones. Black loses the capturing race in the corner. | translate this |
| Black got greedy in the corner and White nets the additional marked stones while making good shape. Black loses the capturing race in the corner. | translate this |
| Too little, too late for White. Can White do better, or does Black have the upper hand? | translate this |
| White survives Black's onslaught but connects with poor shape, allowing Black a number of ways either to escape or disrupt White's influence. White can do better. | translate this |
| This succeeds, but gives Black's marked stones the chance to run and threaten White in sente, in the continuation. White can do better. | translate this |
| You have chosen to defend as White and kill the marked Black stones... | translate this |
| Although White catches the marked stones in the attack, Black survives the attack and White fails to save the stones on the side. Can White do better, or does Black have the upper hand? | translate this |
| Capturing at A gives Black the opportunity to net your marked stones. The Black stones in the corner survive the capturing race you're eyeing. Can White do better, or does Black have the upper hand? | translate this |
| Capturing at A gives Black the opportunity to net your marked stones and make good shape. The Black stones in the corner survive the capturing race you're eyeing. Can White do better, or does Black have the upper hand? | translate this |
| You have chosen to attack as White and save the marked stones... | translate this |
| Black or White: Attempt to save White's marked stones, or play tenuki at A to defend and kill the corresponding Black stones in the mirror image. | translate this |
| Although this final sequence is gote, now White is completely sealed in. Unless the center becomes unimportant, White is not likely to give Black the opportunity to play this sequence, however. | translate this |
| This sequence is ok, but the weakness at A makes it less effective than the alternative correct variation if Black wants to emphasize the left side. In any case, there is a gote followup to this sequence that will completely seal White to the side. What is it? | translate this |
| White captures Black's three stones. | translate this |
| This order of moves is wrong, since White could have optionally played at A or even possibly tenuki at B instead. Better to play the marked stone as the atari at C to reduce White's options. | translate this |
| Ends in gote and still has a major weakness at A. | translate this |
| White would only play this way if he is willing to give Black the corner. | translate this |
| This order of moves is wrong, since White could have optionally played at A or even possibly tenuki at B instead. Better to play the triangled stone at C to reduce White's options. | translate this |
| At minimum, Black could do better in terms of creating aji against the top group. Also leaves a weakness at A. | translate this |
| No way for Black to save his two stones. | translate this |
| Black's stones are dead. | translate this |
| This move certainly attacks White, but leaves many options for White to respond, such as here or at A or even B. If Black wants to emphasize the left side, there is a more straightforward way to force White. | translate this |
| Helps White too much. | translate this |
| This isn't reasonable. Black can't expect White to answer at A. | translate this |
| Just because a move is sente doesn't mean it is a good move. | translate this |
| This ends in gote and lets White play on left side. | translate this |
| This leaves the weakness at A and ends in gote, letting White play on left side. If Black were more interested in the top side on the right, this wouldn't necessarily be a bad way to play. This problem, however, assumes Black is interested in the left side. | translate this |
| Leaves a weakness at A. These two Black stones help White more than force White. | translate this |
| White could play on left at A since Black's stones were not really sente. This sequence only helps White, and Black has little continuity among his stones. | translate this |
| Black effectively seals White out of the left side. | translate this |
| And Black effectively seals White out of the left side. | translate this |
| How to answer White's attempt to break into the left side? | translate this |
| This is correct. Black leans on White to seal him in, and keeps sente to play on the left side. Play at A to continue. | translate this |
| This only helps White. Also, it's the wrong direction. Black is interested in the left side in this problem. | translate this |
| Wedging doesn't work here. | translate this |
| This move is tepid and fails to make effective use of the marked stone on the top. White can tenuki and play on the left. | translate this |
| Black would like to develop on the left side. He could extend to the point marked, but before he does there are some forcing plays he can make against the White group, especially given the presence of the marked Black stone. How should Black force White before extending on the left side, starting with one of the moves A to F. | translate this |
| Black wins by 0.5 Points. Important: Black must not try to win the ko, because any of Black's ko threats will give points away. | translate this |
| You lost by 0.5 points. | translate this |
| Black wins by 0.5 Points. Important: Black must not play a ko threat, because any of Black's ko threats will give points away. | translate this |
| You won the ko, but you lost the game by 0.5 points. | translate this |
| Black wins by 0.5 Points. | translate this |
| Black to win the game. | translate this |
| Snapback (in Japanese 'uttegaeshi'). | translate this |
| Black to capture some White stones. | translate this |
| Bamboo joint (''takefu'' in Japanese). | translate this |
| Black to move. Help the marked stones escape. | translate this |
| D'oh. | translate this |
| White is dead, Black can tenuki now. | translate this |
| White cannot atari at E1. | translate this |
| Black is alive. | translate this |
| White cannot atari. | translate this |
| Wow, you took the scenic route, but got there in the end. | translate this |
| Sorry Black, you are dead. | translate this |
| One eye only. | translate this |
| Ko . There are better ways. | translate this |
| Black can tenuki. | translate this |
| Black can tenuki to live. | translate this |
| White to kill. 2 ways for the first move. | translate this |
| Black can pass (tenuki) to live. | translate this |
| Black can tenuki once more! | translate this |
| Black can tenuki and live. Continue? | translate this |
| Ko. There is a better way. | translate this |
| Well done! This is the only way for White to escape. | translate this |
| Ingenious! Play on to see the escape. | translate this |
| No, there really is a way out. | translate this |
| Play at A (A1) if you think White cannot escape. | translate this |
| Black can tenuki and live. | translate this |
| White to attack. | translate this |
| Dead and gote. | translate this |
| :) :) :) | translate this |
| :) :) | translate this |
| :) :) :) :) | translate this |
| :) | translate this |
| Black tenuki to live. | translate this |
| White captures, and the ko rule prevents Black from recapturing as that creates the same position as before. So Black must find a ko-threat (like trying to escape at Q5). If White answers the threat (P5) then Black can recapture at A, then ignore any White ko threat (assuming one is played) and play at B for sweet, sweet life. | translate this |
| Black is dead. No ko here. | translate this |
| Ko for death! | translate this |
| Black to make a ko for life. | translate this |
| The bulky five nakade. | translate this |
| Black cannot push at A. White is alive. | translate this |
| Even if Black wins the ko White cannot be killed. | translate this |
| Black now has to fight ko to get second eye at A. | translate this |
| Forcing move, but irrelevant. | translate this |
| Black cannot atari. | translate this |
| White to play. Black has a seemingly strong shape. Can it be killed? | translate this |
| Capture three to get an eye, capture two your group will die! | translate this |
| This move only works when the marked liberties are filled. | translate this |
| Double damezumari, now Black cannot atari. | translate this |
| H1 and J2 are miai to live now. As dead as can be ;) | translate this |
| Ko :( | translate this |
| White lives! (A and B are miai to live.) | translate this |
| Well, I dunno why you went for such a trip, but you got there... Nice ;) | translate this |
| Ko. Isn't considered a valid solution if one can kill unconditionally. | translate this |
| Can you really deny White from having a 2nd eye now? ;) | translate this |
| Nice! ;) (A and B are miai now.) | translate this |
| Ko - Not good enough. | translate this |
| Wrong as White can easily live - 1 is a guaranteed eye, and getting a second one here isn't a problem. | translate this |
| White lives! (A and B are miai.) | translate this |
| Yes. Obviously denying Black from having a 2nd eye! ;) (Makes A and B miai.) | translate this |
| Black can't deny White from having a second eye. | translate this |
| Seki. Not good enough. | translate this |
| White lives, as A and B are miai for each eye. | translate this |
| Well - everybody knows that the longest killable line on a side is 7 stones, but in the corner like this... 5 is the longest! (J1 doesn't matter as it's at the very corner!) White's alive. | translate this |
| The White stones spoil the whole look of your game. Can you do anything about them? ;) | translate this |
| Black cannot cut. | translate this |
| Black gets another eye. | translate this |
| Black is alive, but there is a better way. White can use either of the marked points as ko threats. | translate this |
| Sorry White, you are dead as you stand. | translate this |
| Black cannot stop White from linking up. | translate this |
| Sweet, sweet life :-) | translate this |
| Well done! Black wins by 2 points. | translate this |
| Start with G3 to see why this is wrong. | translate this |
| Yes, this also works. Navigate solution at D2. | translate this |
| I actually planned to mark F8, J4 and A1 with letters and ask 'A, B or C' :-) | translate this |
| Yes, this works too. | translate this |
| Yes, also correct. | translate this |
| Yes, should work. | translate this |
| Nice idea, but White still has the necessary threats. Play at A. | translate this |
| Nice idea, but White still has enough ko threats to play at C2. | translate this |
| J4 is locally better. | translate this |
| No komi, no prisoners, Black to play and win. | translate this |
| White to capture and live. | translate this |
| How simple it is :-) | translate this |
| Save the White group. | translate this |
| Correct. A is one of the two ways to kill. Now play the other. | translate this |
| White plays 1, Black responds at 2. How many different first moves can now kill Black without ko? Click on the number. | translate this |
| Black is dead, but there is a slightly neater way to do it. | translate this |
| Easy. Well done. | translate this |
| This minimizes the damage, but White got at least 6 points in sente (Black still has to defend the Q2 cutting point, plus White can still push at O2, getting an extra point). This is why White 1 is so dangerous. | translate this |
| Black can't block at Q1 anymore. | translate this |
| This hanami-ko is too good for White (the worst-case scenario is that the whole Black corner dies, while White does not risk anything at all). | translate this |
| Too good for White (White reduced more than necessary and there's really bad aji at Q3). | translate this |
| This helps nothing. It's the same situation, but losing 2 extra points. | translate this |
| Interesting attempt, but this is not the best answer. | translate this |
| Interesting attempt, but this is too good for White. | translate this |
| White 1 is huge and Black should have not allowed it, if possible. However, now that it's done, minimize the damage. | translate this |
| Alive in seki. | translate this |
| Black to avoid death. | translate this |
| White to save the marked group. | translate this |
| White T3 didn't claim to kill, just makes a seki in sente. | translate this |
| Black is dead. This sequence is the one from the original game. | translate this |
| This is a ko for life. Black can do better and can be alive unconditionally. | translate this |
| If Black don't fight the ko, Black is dead. | translate this |
| White just played T3. Is the situation desperate for Black? Try to secure your group. | translate this |
| Double atari. Fatally nasty. | translate this |
| Bent four in the corner. By Japaneese rules, Black is dead. By IGS rules, the situation would have to be played out. Confused? | translate this |
| Rats. | translate this |
| Black cannot escape as 2 moves are needed to connect. | translate this |
| Both marked points are false eyes; White is dead. | translate this |
| You don't need a threat! The ko was not real. | translate this |
| Black has 2 eyes. Black will recapture G19 if you play there. You did not need a threat to kill, that's the worst part of it. | translate this |
| Black lives and will retake G19 if you play there. | translate this |
| Play T (J15) if you need a ko threat. | translate this |
| You wasted a move on a group that was already dead, giving Black a followup on the threat for free. | translate this |
| It was already dead. Now Black will follow up on the threat for free. | translate this |
| If Black plays a ko threat somewhere else, will you answer it or kill the group? Suppose answering Black's threat is smaller than the group but bigger than just taking sente. Play A (K14) if you want to answer the threat. | translate this |
| The normal marked exchange becomes sente and makes White play an extra stone in his territory. | translate this |
| An ordinary endgame move. | translate this |
| There's nothing in the corner. | translate this |
| Yasui Senkaku expected the game to be in his pockets with White but Honinbo Dochi wasn't so generous. Where did he find some extra points? | translate this |
| Direct ko, White takes first! Hence starting the ko with A1 was not favorable for Black. | translate this |
| White can connect at D1, using it as internal ko-threat! | translate this |
| Direct ko, Black takes first? Success for Black? White should have connected at D1 after Black played E2 in order to get sente. However, as pointed out by Grebble, White can connect at D1 now (using it as internal ko-threat!), Black E2 and White takes the ko first!. | translate this |
| White can also play 5 here and chose seki if the ko is favorable for Black. If Black would like to prevent this, he could deviate one move before (4) to A1 himself. However, then it is White who takes the ko first! White A1 here however is inferior vs. D1 (gote seki: Black E1, White D1), which means thar even this solution does not get full marks! | translate this |
| This approach-move ko (Yose-ko) is not at all favourable for Black. He can do much better (getting direct ko or seki) by taking the outside liberties first (as usual). | translate this |
| White can chose this gote-seki if Black comes away too well with the other option: ko for Black where White has too look first for the Ko-threat. | translate this |
| If White evaluates this direct ko favorable for herself, despite that Black will take first, she can play this way. | translate this |
| The final result: a mannen-ko (10.000 year ko/seki) type situation. Sente for White! Can you imagine? Have a look at the comments (too big for only 3 lines) in the navigate solution. | translate this |
| White D1 is much better because Black must reply at E1 (the approach-move ko at A1 against Black (White takes first) is very unfavorable ).The choice A1 or D1 is thus not about an endgame at E1 but about sente. With D1 White gets sente, because either player refrains now from starting an unfavorable ko against him/herself at A1, response at A2. Either player can resolve with A2, response A1 in gote for seki. | translate this |
| Which reply is now better? A1 or D1? Is White A2 possible? | translate this |
| What type of ko could result from here, seki in sente or gote? These are giveaways, however in the navigate solution only. | translate this |
| Life by 'oshi-tsubushi', literally 'push and smash (squish)'. Http://senseis.Xmp.Net/?Oshitsubushi | translate this |
| Again the only move, threatening oshi-tsubushi, quenching (sqashing/squishing) for life with bA1, wA2, bC1 alive. | translate this |
| Once Black answered here, death is unpreventable. | translate this |
| The 1-2 is the key point. Everything else is wrong and should fail unless Black makes mistakes too. | translate this |
| This White move is wrong (should be C3). It does not give a consecutive series of ataris. Because Black has an eye and 3 liberties, White then will lose this fight 'me ari me nashi' with her own 3 liberties. Reverting almost to the other wrong variation. | translate this |
| Wrong+wrong = correct? Or how to come with consecutive, mutual mistakes (wB2 + bA2) to a correct result. | translate this |
| White dies in gote. | translate this |
| Even if there are White stones on the right, Black has nothing to fear about. | translate this |
| Black plays here and is alive. As usual in go, Black and White are allowed to commit mistakes! | translate this |
| White's hallucination, hoping for Black A2 now. | translate this |
| Wrong + wrong = ? | translate this |
| Wrong + wrong = correct? | translate this |
| In some other problems this seems to be the tesuji, but now White will atari from the left. | translate this |
| Wrong + wrong = ? Black is alive by 'oshi-tsubushi'. | translate this |
| White lost, because the A2 starting move was countered by Black. | translate this |
| Often a good move for taking the liberties, but now White ataris from the left. | translate this |
| The ko. | translate this |
| Tenuki? | translate this |
| The ko. (Far inferior to a clean kill.) | translate this |
| This would be a normal way to stop White's connection to neighboring groups (A, B, not C), but then... | translate this |
| Black's problem is, that he cannot atari at D (auto-atari), neither can White at this moment. However Black must also stop White's connection to the right side. Against only a White B helps Black E. If there is a White A, then it is one of kos 1 or 2. If there is a White C, Black could not even play here and he better had taken the ko 1 earlier. | translate this |
| Better to take the ko 1 now (if there is White on either A or B), but I want to shorten the SGF-path (strenuous). | translate this |
| This throw-in resolves the problems. | translate this |
| Wants to connect to A, B and C. | translate this |
| If there is White Black around, otherwise White jumps there herself. | translate this |
| Threatening ko... And a connection to points A, B or C. | translate this |
| Also a stylish way for Black to make an eye. White cannot approach the eye without herself taking a liberty away (and losing: 'me ari me nashi'). | translate this |
| This move is wrong. However, Black has still 4 moves to get it wrong. And only 2 to punish White for her wrong A2. Find them! | translate this |
| White to move. What is the status of the Black group? Dead, Ko or Seki? What influence would White stones around A, B, C have? | translate this |
| Fails. | translate this |
| Black needs some smarts to win this one. | translate this |
| A two step ko for Black. This is the best possible for Black. | translate this |
| This is not the hardest resistance from White. White can play like that if she dislikes the ko in the correct solution. | translate this |
| This would be a big mistake by White. | translate this |
| This is not the hardest resistance by White. But she can play like this if she wants to avoid the ko in the correct solution. | translate this |
| White has two eyes and Black only one. | translate this |
| Desperate White... ;) | translate this |
| Wrong! White connects and escapes. | translate this |
| White should realize that he can't save this, but this is for beginners, so... ;) | translate this |
| White's connected, and very alive. | translate this |
| Oops? ;) | translate this |
| Aww... | translate this |
| Alive... Alive... | translate this |
| Can you capture A (C14)? | translate this |
| Black A didn't work, so Black has to accept this ko. | translate this |
| This is a better ko than in the solution. | translate this |
| White lives, but Black made a mistake. | translate this |
| This is a better ko than the solution. | translate this |
| Black tricked himself here. | translate this |
| You got it! | translate this |
| Bad shape! | translate this |
| Bad shape :-( | translate this |
| It is a shame to waste liberties like that! | translate this |
| Short of liberties! | translate this |
| This amounts to not much more than a simple hane at E and connection at F (with the difference that White has much better eye shape here. White's eye shape is in this problem however is totally irrelevant.) | translate this |
| Sente seki for White. | translate this |
| Total loss for Black. | translate this |
| Wrong move. Even though Black fills in outside liberty he cannot stop White's connection... | translate this |
| Direct ko for both (Black B or White C). White has to look for the first threat. It is astonishing that Black would start this ko (believing to win it), because after all, White only descended to A, when she thought she could do this ko (big for herself too). The difference to the wrong solution (check the navigate solutions) is thus very subtle: the position is exactly the same but at a different time of White's choice! | translate this |
| And at a given moment choses to take gote to resolve the situation here. White had thus overall twice sente. | translate this |
| Thus White has got sente and plays somewhere else... | translate this |
| White has got sente now and could freely chose the appropriate moment for descending with A. This move can lead to a sente-seki for White or a direct ko for both. This is a 'timing' problem (please continue to play on A to see more comments). | translate this |
| 3 is tesuji. | translate this |
| White was hoping for this result. | translate this |
| If Black now tenukis... | translate this |
| Black settles. | translate this |
| Not very imaginative! | translate this |
| If now White A (e.g. After Black B) White must fight immediately the unfavorable ko. Black could also start with C instead of B. If White then chickens out and has to connect at D, she simply lost points, even over the simple hane at E and connection D. The correct solution diagram has the same position, but at a different time! | translate this |
| This has the same endgame value as a simple hane at E and connection at F. (Black cannot cut at F.) White achieved nothing. | translate this |
| Mistake. | translate this |
| Ko, White erred, then Black. | translate this |
| White to move. | translate this |
| Dead. Nice. (Black would have to play at both A and B now to get a seki.) | translate this |
| Dead, nice ;) | translate this |
| Black's alive - A and B are miai to deny him from having a second eye at B12. | translate this |
| Black's alive - he has 2 eyes. | translate this |
| A and B are miai to get a ko to kill if Black takes C. Otherwise A, B and C are miai to kill: Black's alive. | translate this |
| Black's alive. | translate this |
| Black lives with 2 eyes. | translate this |
| Can White do anything with the Black group? | translate this |
| The sweet smell of a seki in the spring. Nice ;) | translate this |
| Black's dead - dead shape. | translate this |
| Black's dead - dead shape. (White can push at A for a Black B response - dead shape.) | translate this |
| Black's dead - Why-o-why?! :'( | translate this |
| White tenukied. | translate this |
| White can tenuki again. | translate this |
| White can actually tenuki. Black's dead. | translate this |
| White can freely tenuki. | translate this |
| White attacks you, just because you're trying to live in his territory. DON'T GET CAPTURED!!! | translate this |
| Jigo (tie)! Nice! ;) | translate this |
| Well Black C6 isn't really necessary - but it's sente. | translate this |
| Please add a move at C6. (It doesn't change the points stat, but it's easier for beginners such as myself to count this way.) | translate this |
| White - 19 moku : Black - 16 moku -> Black lost... :'( | translate this |
| White - 24 moku : Black - 12 moku -> Black lost... :'( | translate this |
| White - 26 moku : Black - 12 moku -> Black lost... :'( | translate this |
| White - 16 moku : Black - 12 moku -> Black lost... :'( | translate this |
| White - 20 moku : Black - 16 moku -> Black lost... :'( | translate this |
| White - 27 moku : Black - 13 moku -> Black lost... :'( | translate this |
| White - 22 moku : Black - 12 moku -> Black lost... :'( | translate this |
| White - 23 moku : Black - 13 moku -> Black lost... :'( | translate this |
| White - 21 moku : Black - 17 moku -> Black lost... :'( | translate this |
| White - 21 moku : Black - 13 moku -> Black lost... :'( | translate this |
| White - 21 moku : Black - 14 moku -> Black lost... :'( | translate this |
| After White 1 (C7), Black doesn't have any ko threats, so he passes, and White plays 3 (C8). White - 23 moku : Black - 13 moku -> Black lost... :'( | translate this |
| White - 20 moku : Black - 17 moku -> Black lost... :'( | translate this |
| Black lost. Please follow the marked path to see for yourself. | translate this |
| White - 13 moku : Black - 12 moku -> Black lost... :'( | translate this |
| Black lost. Follow the marked path to see for yourself. | translate this |
| White - 19 moku : Black - 15 moku -> Black lost... :'( | translate this |
| White - 22 moku : Black - 20 moku -> Black lost... :'( | translate this |
| Don't lose... Not now... (NO KOMI!) | translate this |
| Nice! (I connected as well - lost the game, but connected, and got this one corner.) Shouldn't happen as Black's unlikely to proceed with the ladder. | translate this |
| Nice ;) | translate this |
| Black lives in the corner, and everybody's happy... (You could resume it, but it's not a part of the problem anymore, as what's requested was to connect. To see for yourself that you can't kill, BUT a mistake would fail you.) | translate this |
| Q4 was originally played, but Black shouldn't fall for the ladder and try to live in the corner. (All the Black S2 variations were suggested by tderz.) | translate this |
| Nice. This poses a double threat - either to connect through capturing P4 or by netting and getting N5. | translate this |
| This isn't too good, as the Black move at M5 is harming the center. | translate this |
| This isn't too good, as the following Black move at M5 is harming the center. | translate this |
| Black played A to disconnect - 'Undo' it ;) | translate this |
| White - 28 : Black - 30 - NICE! ;) | translate this |
| You really like useless moves, eh? Well... Who'll win? | translate this |
| This is just wasting time... It doesn't affect the score. | translate this |
| White - 27 : Black - 29 - NICE! ;) | translate this |
| White - 27 : Black - 26 - You lost. :'( | translate this |
| Who's winning? ;) (NO KOMI) | translate this |
| Capture the marked stone. | translate this |
| And if Black cuts? | translate this |
| How to handle Black 1 (which is, in itself, a joseki mistake)? | translate this |
| This stays connected though White is not completely alive in the corner. | translate this |
| The marked exchange is very bad. | translate this |
| If White can attack one of the Black groups this is playable. | translate this |
| White needs another move to prevent ko so this is good for Black. | translate this |
| Playable but Black has some sente moves around G18. | translate this |
| The corner is seki so this is playable. | translate this |
| How to respond to this Black sequence? | translate this |
| White N11 is better for White. | translate this |
| White connected and escaped :( | translate this |
| And if Black tries to do anything, White can resort to a little net ;) | translate this |
| Can you capture a couple of stones here? :) | translate this |
| Nice :) | translate this |
| Black would naturally capture as much as he can. | translate this |
| Hmmm. | translate this |
| Black is free to reduce a bit more, and capture at H7 afterwards. | translate this |
| White thinks that he chooses to protect the larger amount of stones, but... | translate this |
| White chose to protect fewer stones?! Ohh well... Not that it matters here :) | translate this |
| Well, saved some, but it's less than optimal. | translate this |
| Black just played A; how to respond? :) | translate this |
| Black captures everything. | translate this |
| Optimal play for both players. | translate this |
| Black just played at B in response to A to connect. How could White kill the 3 marked stones? (Should be easy.) | translate this |
| Ko. White could have lived without ko. | translate this |
| Black still ends with only one eye at D5. | translate this |
| Black loses his hope - can't get two eyes. | translate this |
| Black's dead. (He needs to play in 3 locations simultaneously to get 2 eyes!) | translate this |
| Black's dead. (He needs to play in 2 locations simultaneously to get 2 eyes!) | translate this |
| And? ;) | translate this |
| Nice! :) | translate this |
| Just giving away points is wrong. | translate this |
| A ko! :( | translate this |
| Guess who's dead? :) | translate this |
| Black's dead! :( | translate this |
| :'( | translate this |
| A nice reply here is White E5 but I'm too lazy to include it - and Black lives anyway ;) | translate this |
| Can Black save his D4 group? :) | translate this |
| Seki, the only answer... | translate this |
| Not even ko. | translate this |
| One eye... | translate this |
| Black played tenuki thinking that the corner is safe and sound. Can White find something useful? | translate this |
| O.O | translate this |
| Oops? ;) (White can't play both A and B, so Black can freely tenuki...) | translate this |
| Oops? ;) (Can't have 2 eyes now.) | translate this |
| White's dead! :'( | translate this |
| Ko. (The best possibility for White if he starts with A4.) | translate this |
| Black can freely tenuki... Dead anyway. | translate this |
| Seki. (Alive, but not the best way.) | translate this |
| Dead - according to the Japanese rule set. | translate this |
| Dead as A2/C1 kill. | translate this |
| Ko... Could be better... Much better. | translate this |
| As simple as White to live :) | translate this |
| And now dead =( | translate this |
| White is killed in this variation. | translate this |
| White's tail dies in this variation. | translate this |
| Too small life. | translate this |
| Still lives a bit smaller, but as you live with this technique, you get a pass. | translate this |
| This way you lose 1 point but the theory is correct. | translate this |
| Black lives but K19 would have been a few points better. | translate this |
| This would be a problem but just focus on the technique. | translate this |
| Linking the Black groups. | translate this |
| Easy right?! (Black still wins the game ;) | translate this |
| Black played X. How should White answer? | translate this |
| White to do something useful. | translate this |
| You won by 1. Due to its big followup move at F, the small monkey jump into this corner formation at S is equal in value to a gote move worth 14 points. When Black has an alternative reply to F of 9 to 15 points, it is bigger than the large monkey jump at C9. If C is worth 8 points or fewer, or equals 16 points, first moves C9' and S allow the same best result. If C is worth 17 points or more, C9 is 1 point bigger than S. | translate this |
| You lost by 1. Your first move was correct, but the second should have been to connect at C, rather than play C9. | translate this |
| Jigo. This is the 2nd best result. Your 1st move was correct, but the 2nd should have been to connect at C, rather than play C9. | translate this |
| Please play B9. | translate this |
| You lost by 1. Jigo was possible from L, whilst a first move at S allows a 1 point win. | translate this |
| Jigo, the best result from the large monkey jump. L is inferior to S when the size of the gote move at C is worth 9 to 15 points. If C is worth 8 points or fewer, or equals 16 points, first moves L and S allow the same best result. If C is worth 17 points or more, L is 1 point bigger than S. | translate this |
| You lost by 2. If C is worth 13 points or fewer, it is smaller than S. Here, a first move at S would have allowed a win by 1. | translate this |
| Which is the biggest move; large monkey jump L, small monkey jump S, or capture C? | translate this |
| One eye... And that's just weird shape in my opinion. | translate this |
| Oops... We all do that sometimes. | translate this |
| False eye. | translate this |
| One eye... And Black's D1 wasn't even necessary at that moment. | translate this |
| It's just that easy. | translate this |
| That works, but playing at C1 instead of D1 is a point better. | translate this |
| Weird play by Black, but you could have made 2 more points profit during that sequence. | translate this |
| Good job with B1... It was two points better than playing inside first. | translate this |
| Sometime during this sequence there was a move that would have made you 2 more points. Try to find it. | translate this |
| That's live shape for you... But... Why is Black still fighting? | translate this |
| That works, but Black probably wouldn't play F1... It gives you too many points. (I kept it in because of an interesting variation that can happen.) | translate this |
| Only 5 points. | translate this |
| Black's mistake: now get the max out of it. | translate this |
| That's just dead... | translate this |
| Alive, but you can easily do better. | translate this |
| Yes it's alive... But you only got 3 points inside? | translate this |
| Black just played the mark stone. How can White live? (Please do so in the most profitable way.) | translate this |
| White captures the corner with the aid of superior ko threats. | translate this |
| So close! | translate this |
| Now finish the job! | translate this |
| Black responds at B. | translate this |
| Ko for the corner. White plays out her superior ko threat at A. Black responds at B. | translate this |
| Snapback. Ouch! | translate this |
| Can White capture the whole corner? | translate this |
| Nice, a ladder! :) | translate this |
| :( | translate this |
| Nope - alive. | translate this |
| Sente seki - Nice! ;) | translate this |
| The marked Black stones are captured, or White makes a bulky 5. Either way, dead. | translate this |
| The marked group is captured due to it having fewer liberties. | translate this |
| Black's dead. (If he tries to take it turns into a bulky five in no time, and bam...) | translate this |
| Dead in gote - is it the least optimal solution? :) | translate this |
| White connected outside, and Black's dead. | translate this |
| Tenuki (at Q16) or save your group. | translate this |
| Oiotoshi. | translate this |
| 3 liberties = failure. | translate this |
| Does the ladder work for White? If yes, play it (at A), else play B. | translate this |
| Nice! ^.^ (By creating a bamboo joint you secured a connection to the outside, while protecting the cut at L9 :) | translate this |
| Aww... You lost some stones. :( | translate this |
| Aww... You lost them, all :( | translate this |
| White to save as many of his stones as possible. | translate this |
| Well done! White: 21 - Black: 21 -> It's a jigo! :) | translate this |
| Well done! - White: 22 + 1 prisoner - Black: 21 -> White wins by 2 moku! Wouldn't happen. | translate this |
| Equals a pass. | translate this |
| Black would play F5 because White C4 only threatens 1 point of territory, while F5 threatens 2 points of territory + 1 prisoner. (And only is here to show it.) | translate this |
| Oops? White: 20 - Black: 21 -> White lost! | translate this |
| Oops? White: 20 - Black: 21 -> White lost! (White E4 would be a bit better.) | translate this |
| Is the game over? Play at C2 to pass, if you think it is. (NO KOMI.) | translate this |
| Black's alive! | translate this |
| Ko for the rest of the corner. :) | translate this |
| This is wrong, as it leaves another 'pushing point' for Black. | translate this |
| Correct! There's no need for a 'safe eye' or building walls or anything at all - AND it doesn't let Black to have a 'pushing point' at A17, which'd give him the corner! (I made 4 tsumego problems to show that Black can't live in the corner as it is. The best possible result for Black now would be a ko, with White taking first, if he goes for D.) | translate this |
| Black just played at A - How to respond? | translate this |
| Ko isn't good enough. | translate this |
| White can get a ko now. | translate this |
| Ko not good enough. | translate this |
| Ko isn't good enough, you could have killed cleanly. | translate this |
| Black to kill White's corner. | translate this |
| Correct, White can't kill :) | translate this |
| Black can do better! | translate this |
| White played A, what's the best move for Black? | translate this |
| You just gave Black 1 extra prisoner. He also could have responded E16 and fought the ko. Since you have a chance to kill cleanly, giving him this chance is wrong. | translate this |
| Ko for the 4 White stones, but you could have saved them unconditionally. | translate this |
| If Black wants to try a ko he can play this way, but usually he'd just connect at C19 and you would have wasted a move. | translate this |
| Escape. | translate this |
| K19 is wrong because now if Black ignores this ko threat, the K19 stone will be in the wrong place. After White L19, Black's stone would be better at J19. So J19 lowers the value of M19 as a ko threat. | translate this |
| Ok. If you had done K19, White's M19 ko threat is bigger. | translate this |
| The Black group above has one eye and it'll take 4 moves to relieve the pressure below, so White can attack around C13. | translate this |
| Ko, or White can connect and give Black the choice between a bad ko and White killing lower left. | translate this |
| Ko, but Black takes first! | translate this |
| Ko, but Black takes first. | translate this |
| Ko! Nice! | translate this |
| Ko - But Black takes first. By playing at C19 instead of D19 White'd take first. | translate this |
| Black's alive! (A and B are miai to kill.) | translate this |
| Nice! :) (A is now a must to secure eye number 1 and B is a must to get a 2nd eye -> Black's dead.) | translate this |
| Ko - Could be better. | translate this |
| Black C19 is suicidal - Black should play at A17, and therefore the problem will always play there. Black C19 is only left to show why. | translate this |
| Ko. But Black takes first! | translate this |
| Black's alive! (A for 1 eye, B for the other.) | translate this |
| Black's alive! (A for one eye, B for the other.) | translate this |
| Black's alive! (A gets the other eye.) | translate this |
| Black's alive! (A for 2 eyes.) | translate this |
| A ko isn't a good enough solution, when a sure kill is possible! | translate this |
| Black's alive! (A for the second eye.) | translate this |
| Ko, White takes first! Well done! | translate this |
| Ko. But Black takes first. | translate this |
| Ko. And White takes first! Well done! :) | translate this |
| Black thinks that he can live after White 1 this way. Break this delusion. | translate this |
| Black lives! :( | translate this |
| Black lives! (He has 2 eyes.) | translate this |
| This move is really pointless - and only is here for this comment. After this, almost any move will kill. | translate this |
| Black's alive! (He has 2 eyes, as White has to play at both A and B to deny him from the second one.) | translate this |
| Black's alive! (He has 2 eyes.) | translate this |
| Black thinks that he can live after White 1 by playing at 2. Make him face reality. | translate this |
| Black's alive! (He will have 2 eyes.) | translate this |
| Black's alive! (He'll obviously have 2 eyes.) | translate this |
| Black's alive! (Thanks, tails! ^.^) | translate this |
| Thanks, tails for providing the Black A18 and Black E18 responses to live! :) | translate this |
| After the correct White 1 reply to A Black thinks that 2 will save him - bring him down to earth. | translate this |
| Black to win the ko twice to live - still could be better. | translate this |
| Thanks to tails for this response! | translate this |
| After the correct White 1 reply to A, Black thinks that 2 will save him - show him how wrong he is. | translate this |
| Simply capturing is best. See variations. | translate this |
| White has lost a lot of territory and the marked stone retains cutting aji. | translate this |
| Black plays the marked move. How should White answer to get the best shape? | translate this |
| Nice! Black's alive! :) | translate this |
| Black's dead :'( | translate this |
| White A5 will be played here, because I find it more interesting. | translate this |
| Black would live - wouldn't happen. | translate this |
| White D6 will be played here because I find it more interesting. | translate this |
| Black's dead! (A and B are miai to live.) | translate this |
| Wrong! Half of it was captured. | translate this |
| Can Black save all of her group? Sure she can - I saw her doing it! ;) | translate this |
| The whole big group is dead... I guess there must be a better way ;) | translate this |
| The big D16 group is dead... | translate this |
| D16... Dead. | translate this |
| Alive ^_^ | translate this |
| Dead :( | translate this |
| Nice ;P | translate this |
| :D | translate this |
| Doesn't work :-/ | translate this |
| Dead, as you can see. | translate this |
| :/ | translate this |
| Alive with double ko. | translate this |
| Yeah... | translate this |
| Okay. | translate this |
| Can Black save his D16 group after White A? | translate this |
| Kill White ;) | translate this |
| This is just wasting another turn - White can tenuki again! | translate this |
| White can tenuki - K16. | translate this |
| Ko - Black needs to win it twice to kill. This is the best he can get, it seems. | translate this |
| White can tenuki. (K16) | translate this |
| White can easily play at S14 here. After Black takes a liberty from any direction, White T17 makes life. | translate this |
| That's right! ^.^ (Black can play either of the 2 marked locations.) | translate this |
| Can Black kill the (marked) White group? Play at NO, if you think he can't. | translate this |
| More points. | translate this |
| Right idea but you leave a ko threat. | translate this |
| Right idea but you leave ko threats. | translate this |
| Top dies. | translate this |
| Corner dies. | translate this |
| The group on the left was already alive. White happily takes the group on the right that you could have saved too. | translate this |
| Whoopsy daisy. Your first move destabilized a living group! | translate this |
| Black can't save his two on the bottom, so just connect on top in sente. | translate this |
| Wasted a threat. | translate this |
| You won by 1. Due to its big followup move at F, the small monkey jump into this corner formation at S is equal in value to a gote move worth 14 points. When Black has an alternative reply to F of 9 to 15 points, it is bigger than the large monkey jump at L. If C is worth 8 points or fewer, or equals 16 points, first moves L and S allow the same best result. If C is worth 17 points or more, L is 1 point bigger than S. | translate this |
| The White group is dead. Your first two moves were correct, but the third should have been at A rather than B. | translate this |
| A ko that Black takes first, and White has no threats. Your 1st two moves were correct, but the 3rd should have been at A rather than B. | translate this |
| You lost by 1. Your 1st move was correct, but the 2nd should have been at F, rather than G. | translate this |
| You lost by 2. Jigo was possible from L, whilst 1st move S allows a 1 point win. | translate this |
| Jigo, the best result from the large monkey jump. L is inferior to S, when the size of the gote move at C is worth 9 to 15 points. If C is worth 8 points or less, or equals 16 points, first moves L and S allow the same best result. If C is worth 17 points or more, L is 1 point bigger than S. | translate this |
| Jigo, the best result from the large monkey jump. L is inferior to D9 when the size of the gote move at C is worth 9 to 15 points. If C is worth 8 points or less, or equals 16 points, first moves L and D9 allow the same best result. If C is worth 17 points or more, L is 1 point bigger than D9. | translate this |
| Jigo, only 2nd best. If C is worth 13 points or less, it is smaller than S. Here, a 1st move at S would have allowed a win by 1. | translate this |
| You lost by 1. A 1st move at S allows a 1 point win. | translate this |
| Jigo, the 2nd best result. A 1st move at S allows a 1 point win. | translate this |
| Which is the biggest move; large monkey jump L, small monkey jump S, kosumi K, push P, or capture C? | translate this |
| Here are the right points. | translate this |
| Black will have a struggle ahead for both cut groups. | translate this |
| Get yourself connected... The writing's on the wall. | translate this |
| In the NZ rules set, ONLY territory is counted, and that includes the territory under the stones. So - Black has 12 moku : White has 11 moku => Black+1. If Black'd save the other group - Black'd have 10 moku and White'd have 12 -> White+2. Hence this is better for Black, by 3 moku. (Not considering E1 as it's a small endgame move after saving the lower group.) | translate this |
| Nope, the correct answer is 3. Please chose it for an explanation. | translate this |
| (Area Scoring) By how much is it better? (Check out the solution for the right amount.) (Not considering E1 as it's a small endgame move after saving the lower group.) | translate this |
| NZ RULES. By how much is it better? (Checkout the solution for the right amount.) (Not considering E1 as it's a small endgame move after saving the lower group.) | translate this |
| In the NZ rules set, ONLY territory is counted, and that includes the territory under the stones. So - Black has 10 moku : White has 12 moku => White+2. If Black'd save the other group - Black'd have 12 moku and White'd have 11 -> Black+1. Hence the other one was worth 3 points more. (Not considering E1 as it's a small endgame move after saving the lower group.) | translate this |
| Wrong! The upper one's worth more. | translate this |
| Wrong - White takes the bigger group, and Black saves the lower one in gote.. | translate this |
| Wrong - Lets White chose what to kill. | translate this |
| White takes the bigger group, and Black saves the lower one in gote. | translate this |
| Both are dead - Does White have a Black-day, or something? What's the present for, then?! | translate this |
| Wrong - Just kills the lower one, and lets White kill the upper one, as well. | translate this |
| Area Scoring - Which one would you rather save? (Click on D for doesn't matter! Or save one.) | translate this |
| Gote seki, and Black got one point. | translate this |
| Black can do better than that! | translate this |
| Good job. | translate this |
| Very nice. | translate this |
| What if White resists? | translate this |
| White just played 1. How to answer? | translate this |
| Nice! White can't play at A! :) | translate this |
| Only a ko! :( | translate this |
| White's fine! | translate this |
| White's alive! (A, B miai to kill.) | translate this |
| White's alive! (A and B are miai to kill!) | translate this |
| Can Black do anything? | translate this |
| Correct. According to the NZ rules set, only territory is counted - including the territory under the stones. If White takes it, both H1 and H2 are 2 points for him, otherwise it's 2 points for Black. The difference is 4 points. :) | translate this |
| Wrong. According to the NZ rules set, only territory is counted - including the territory under the stones. If White takes it, both H1 and H2 are 2 points for him, otherwise it's 2 points for Black. The difference is 4 points. | translate this |
| AGA/Chinese/NZ Rules - How big is the difference between White/Black playing at A? | translate this |
| Nice! Territory including under the stones, excluding prisoners, is what's used in the NZ rules! Black:41 - White:40 -> Black won! :) | translate this |
| Points in the NZ rules set are counted as the following - Only territory (no prisoners), including the territory under the stones. So dame are counted - If Black starts taking the dames, he wins by a point... This way White wins by a point! White:41 - Black:40. | translate this |
| NZ RULES - Can Black win this game? Play at NO if you think, he can't. (NO KOMI) | translate this |
| How can Black reduce? | translate this |
| Black has 2 eyes... He's alive! | translate this |
| Black has 3 eyes... He's alive! | translate this |
| Ko - Could be better! | translate this |
| Black could got at Q5 and live... but... | translate this |
| Can White kill? | translate this |
| Wrong... ;( | translate this |
| Wrong... ;( - Ko for a slight reduction. (If Black wins the ko, it's sente for him - as White'd have to protect vs S7!) | translate this |
| Wrong... ;( Black can reduce a bit by playing at S8 - and then O7. | translate this |
| Black just played A - Can White save his stones, or must White give in? | translate this |
| Nice! :) (No way to deny Black from having 2 eyes now, is there?) | translate this |
| Nice! :) (White can't play at E19, making it fake.) | translate this |
| Black won't have 2 eyes, now -- the one at E19 will be fake! | translate this |
| Black won't have 2 eyes, now - the one at C19, E19 will be fake! | translate this |
| You can only capture 2 stones this way. | translate this |
| Not bad, even though you have not yet taken the max out of Black's mistake. | translate this |
| You even get those 2 stones for free. | translate this |
| Just too small. | translate this |
| Black shouldn't do this, but if he does... | translate this |
| Black had to prevent against P15 and P19, but P15 is smaller, so you can still have a nice big gote play at P15. | translate this |
| Nope, not enough. | translate this |
| A very nice reduction. | translate this |
| Thanks for the free stone. | translate this |
| Nice sente reduction. | translate this |
| OK. | translate this |
| An unnecessary seki. | translate this |
| Correct but ugly. | translate this |
| That corner still looks awfully big. | translate this |
| White can do a bit better. | translate this |
| O17 came too late. | translate this |
| Would obviously kill, anyway... | translate this |
| A9/10 would obviously kill. | translate this |
| Ko. This is the best for Black. | translate this |
| Ko. This is best for Black. | translate this |
| Black forced White into bad shape. | translate this |
| White has bad shape. | translate this |
| Well you didn't have to waste the threat at H1. But well done! | translate this |
| Black's dead. (K2's doomed to be a fake eye.) | translate this |
| Ko. And White takes first! | translate this |
| Black's dead... In gote! | translate this |
| You're much better than me! Well done! (A and B are miai to live now... Black's alive!) | translate this |
| Ko. Could be better. | translate this |
| Black's dead! (The main part of the group is in atari.) | translate this |
| Ko and White takes first! | translate this |
| Black's dead! (The main part of the group is in atari!) | translate this |
| Black's dead! (Can't approach at A.) | translate this |
| Can Black live? (Well if s/he couldn't - How would it be a tsumego?!) | translate this |
| Black kept sente. | translate this |
| Gote. White will play elsewhere. | translate this |
| White's weaknesses here are much less than in the correct variation, therefore he doesn't need another move and will play elsewhere. | translate this |
| Black to take the corner. No ko. | translate this |
| Ko, no good. | translate this |
| Black to capture the corner. | translate this |
| White connected == Black disconnected. | translate this |
| White can't win that race. | translate this |
| Too slow, you're captured. | translate this |
| There are better results than ko. | translate this |
| This strange route works, but the sacrifice is unnecessary. | translate this |
| Look what you've gotten yourself into! | translate this |
| White can't escape now, but you will probably need to connect or capture sooner or later. | translate this |
| Too slow, Black is captured. | translate this |
| Much too slow -- you're captured! | translate this |
| White's escaped! | translate this |
| White's trapped. | translate this |
| White can't connect out. | translate this |
| Black's in a bad way. | translate this |
| White's wrapped up! | translate this |
| White can't escape that way. | translate this |
| Black's fate is sealed. | translate this |
| Black's group is completely cut off. | translate this |
| Black's cut off. | translate this |
| Black's got no way out. | translate this |
| Black's sealed in. | translate this |
| Black remains trapped. | translate this |
| Black's still cut. | translate this |
| Black connected == White disconnected. | translate this |
| Your trapped group has a nice connection to... Another trapped group. There's a better way. | translate this |
| You've connected to your trapped group, but you're still trapped. There's a better way out. | translate this |
| Now you've got three weak groups in a big messy fight. There's a simpler solution! | translate this |
| Can Black save his G17 group? | translate this |
| Black to rescue the marked stone. | translate this |
| Right. Black take all the corner! | translate this |
| White escapes unharmed. | translate this |
| White gets captured. | translate this |
| White has no problems. | translate this |
| 10 Black stones are dead but White made a mistake by playing at A. Can Black do anything? | translate this |
| White is alive and running along the side. | translate this |
| How should Black play down the left side? | translate this |
| You can't double hane here. | translate this |
| Black is left with a weakness below. | translate this |
| No good because you traded B12 for B11. | translate this |
| Black to connect his 3 stones in the corner with the 4 outside. | translate this |
| Black to connect and save his 5 stones underneath. | translate this |
| Bravo! (Life in double ko.) | translate this |
| Black lives with half of his group... | translate this |
| A 2 step ko. Not bad, but Black has something better. | translate this |