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( ; FileFormat[1] BlackSpec[1] WhiteSpec[1] GaMe[1] VieW[] Comment[Black: Michael Norrish White: Chris Chisolm Started: Oct 18 1991 Completed: Early 1992 Result: White wins by 1 point \(plus komi?\) Commentators: Robert Elton Maas \(2 kyu\), Peter Kim \(3-2 kyu\), rON \(4 kyu\), Char \(1 Dan\) Doug \(2 Dan\), Jos Vermaseren \(4 dan\), Shawe-Shiuan Wang \(3 dan\) and Xiangming Liu \(?\).] ; Black[dp] ; White[ed] ; Black[pp] Comment[Landman: Poka actually considers this to be the best pro move. It has also seen C16 and Q16 in this context.] ( ; White[pd] Comment[Landman: Poka thinks Q15 is better. One way of looking at this might be, that after Q16 there is only one big corner move left \(at C16\), which Black gets. After 4.Q15, there are two such moves left, and so White is guaranteed a shimari.] ( ; Black[jp] Comment[Maas: San ren sei, rather popular lately. I would have approached the white stone on the 4-5 point instead, but at this stage as Lance Kemper said "anything works". This doesn't mean you can play at random, but nearly any standard move is compatible with some possible game plan and only a few points worse than the "best" move, quite playable in amateur games. Peter Kim: This is only true if you are willing to aid white in building his moyo with moves e16 \(a high influence and center oriented move\) and q16 \(again a move good for working toward a moyo\), but from further moves is appears that white has gone for a more territorial game. White still has the potential for a moyo, but it seems less likely now. Landman: Against 4.Q15, Poka thinks this is the best move. Since the upper corners are miai, that seems reasonable. But against 4.Q16 Black should invade immediately at 5.C16. A reasonable continuation would be White at 6.D14 to build central influence \(both to work with the Q16 stone, and to begin to counter the Black nirensei\). At any rate, the focus of the game would then be the upper left for a while.] ( ; White[kc] Comment[Maas: I would have made an enclosure in the upper left corner, but again at this stage "anything works". Shawe-Shiuan Wang <wangs@sol.engr.umbc.edu> says this move is bad, see black's good reply at Q10 which black missed in the game. Peter Kim: I think that enclosing the upper left corner is premature, and by playing as high as white did, white doesn't appear to want the corner too urgently. L17 works better with what white has already established, a flexible fuseki for territory or moyo. I think c16 \(or something like\) lacks tempo at this point. Black has taken a big point of potential, white should answer with the same. rON: I was shocked to see white \(Chris\) opening up so passivly. Black opened with a standard 4-4 to san-ren-sai on the lower side; very quiet and non-offensive. White opened up quiet as well; I think white would have been a bit better off starting at d15 instead of e16 for a 5-4 opening, because I feel it better faces the 4-4 pointing into the center that black opened up with. Char: Thumbs down: Black seems to be expanding faster than white. Doug: Thumbs up: White's moves are balanced both territorrialy and influentially. Jos: Personally I would not play this at all. You give black a chance to attack your left upper corner to prevent your shimari. Imagine the sequence B:e16, W:e17, B:f17, W:d17, B:f14 and black starts having magnificent influence. So you should answer something like g17 or g16, but whites position looks already a little cramped. During the following moves neither side seems to consider the shimari \(white at e16\) very big. In my eyes that is a big mistake! Xiang-Ming Liu: I would attack the lower right corner. I think if white wants to counterbalance black's moyo, L16 is better. Landman: Out of Poka's opening book. To me, this seems a little tight. It's like a low Chinese shrunk by two spaces. Surely the shimari at C16 is bigger. However, Poka's \(19 kyu\) algorithm likes this move a lot. Almost as much as K11 ... :->] ( ; Black[dj] Comment[rON: Black went passive again by playing the 'big point' on the left, giving white the 'big point' on the right. Char: Thumbs up: Good stategic move following San-ren-sei opening. Doug: Thumbs down: Gote. An approach move would be better. Jos: If not at e16, than the right hand side is far superior now. White has no good extension on the left side as long as his corner stone is still this open. So one possibility is r14. If W:o16 you play at Q10 and are in magnificent shape. White cannot play like this. His stone at L17 looks an itsy bit overconcentrated already. Alternative: W:q11, B:r17 and white has to choose between q17 and r16. I prefer the black position. Shawe-Shiuan Wang: I would choose Q10. Following are the moves I expect: 7-Q10, 8-D10, 9-R14, 10-O16, 11-C16, 12-D14. Because ladder \(C14, C13\) is good for black and black's territory is larger than white's. I think black is better. \(Hence, 6 L-17 may not be a good move.\)] ( ; White[qj] Comment[Maas: Ain't seen no action yet ... Peter Kim: With black playing san ren sei it looks like both parties are capable of working for a moyo, but white looks a bit more like he's working toward territory on the edge, but he's flexible enough to still go for a moyo. \(I like white's position slightly better\) Char and Doug: 2 Thumbs Down: Gote. White should take the initiative. Xiangming Liu: Still, if you want to build a moyo, Q10 is better.] ( ; Black[qm] Comment[Maas: This move looks bad now that I think about it later. White's stone is low, so this move doesn't threaten to undermine it. It's on the third line, so it doesn't threaten to cap the white stone. It's two-skips away, so it doesn't threaten to squeeze much. The center, or a kakari \(approach enemy corner\) might have been better. Wang agrees and says he'd pick the kakari at C16. Peter Kim: This may have been better at k10. Black after white's k10 is going to have a much hard time refuting white's moyo, AND prevent white getting enough center influence to attack black's potential territory. also after white k10 black does not have a good move, as seen in moves 11-13. rON: Black loses some of his advantage by playing r07. It, too, is passive, and doesn't really face anything in particular. White jumps on the opportunity to take a very large point right in the center. Char: Thumbs down: Counters the strategy behind San-ren-sei and doesn't really guard the corner. Doug: Thumbs down: What does this stone do? Jos: e16 is still superior. Shawe-Shiuan Wang: I would choose C16. I don't think R7 is the biggest move because there is white stone is on R10 but not Q10. Xiangming Liu: 9-R7 is not as important as K10. Michael: I now think this is way too slow for what I want to do in this game. As numerous netpeople pointed out, playing low like this makes a mockery of my hitherto high strategy.] ( ; White[jj] Comment[Maas: I was sort of expecting that at some point somebody would play in the center to stake out a large moyo \(territorial framework\). White has now done so. Now the burden is on black to prevent white from turning most of it into territory, by reducing and/or invading sooner or later. It should be easy for black to reduce the moyo, but if he waits too long it may indeed turn into white territory. The theme of this game is now set. Wang would pick C16 enclosing the corner instead. White: Tengen I win!!! There is one of those sayings floating around the local go club: "the first one to tengen wins" :-\) Jos: You don't make territory that easily. Look at some pro-games and see how much territory they really get out of such a moyo. rON: This point \(White K10\) is important, especially in this game, because both players have designated that they want to play a center-oriented game \(3 4-4 points and the 5-4, all four opening moves are center oriented openings\). This point will serve white very well later on when he \(white\) starts attacking. Doug: Thumbs level: This has a shin-fuseki feel. Will white know how to use it? Char: Thumbs down: I think now is the time to attack. I like the move at O3. Shawe-Shiuan Wang: I would choose C16.] ( ; Black[df] Comment[Shawe-Shiuan Wang <wangs@sol.engr.umbc.edu> would pick D13 instead. See the bad shape that results after this D14 and black's next move. Maas agrees, simply make a two-skip jump to D13 then black wouldn't have to make another move here after white replies, so black would get sente and good shape. Player: I preferred to approach the corner because I wanted to keep an outside 'feel' to my game. I didn't want to lose my stone behind a white wall if I invade at the 3-4 point. Peter Kim: 11-d14 is about the only move black can make at this point for an attack. If black goes for the corner. White can seal black in and increase his influence toward the center. Something white appears to have been willing to do from the begining, since he player the 4-5 point. If black plays on the upper right side of the 4-5 point, white can build a loose wall on BOTH sides of black. Again this would improve white's moyo on the right, make taking the upper left corner easier for white to "put in the bank", and leave black with a vulnerable group on the board. Char and Doug: 2 Thumbs Down: What does this move hope to accomplish? Jos: 11-d14 is really bad. Now you force white to take the important point. Shawe-Shiuan Wang: How about D13? these three 3 black stones \(D10,D14,F14\) are not in good shape.] ; White[cd] Comment[Char and Doug: 2 Thumbs up: Good response. A move white wanted to make anyway, and black induced him to make it.] ; Black[ff] Comment[Maas: Next, white can either try to turn the center into territory by blocking black's advance, or invade somewhere in the lower leftside or along the bottom. White won't be able to actually turn much into territory, but threatening to do so will constrain black's options. Note also the inefficient shape of black's stones at D10 D14 and F14, pointed out by Shawe-Shiuan Wang <wangs@sol.engr.umbc.edu>. Jos: ... there is no territory, just influence. And one of the rules about influence is that if you try to convert it directly into territory you get too little. You can only turn influence profitably into territory if you have something that can keep the opponent busy, like while you attack a group. That can give you a chance to seal off one side without him being able to come in from the other side. As it is, black can build several living groups insides whites sphere of influence. So the focus will turn now to how white should use his stone at k10. It is a little bit far away from his other stones on the upper and right side, because both are on the third line. Peter Kim: Once white has taken the 3-4 point black again is forced to play f14 anything else will allow white to either make weak black groups on the board, or convert even more of white's potential in to territory. \(Similar reasoning to 11-d14\) The problem \(that began with white's move at k10\) is made worse now that white has sente. B14 for white is really good here for white since it is urgent for black to answer here, but has no good way to strengthen his two stones well and regain sente. White can then commence an attack on black's moyo or territory, especially if white utilizes k10. rON: The passive opening by black allows white to draw black into whatever type of game white wanted to play. White could have just as easily elected to play the 'big-moyo' type game, or the lets get down and fight type game, or anything in-between. White is going to chose the fighting game. Passivity in the opening will allow your opponent to draw you into their type of game, which is something you don't want. Char and Doug: Thumbs level: We must wait and see how this will be used. Jos: 13-f14 seems fine to me. But now you are running after white. He has gotten the initiative. Just because you refused to take the good point and let him take k10 too. He should never get both points.] ( ; White[hc] Comment[Maas: Hmmm, white takes top-side territory instead of protecting the center moyo. Michael: I was happy with how slow this move appears to be, \(although it does look nice and solid\). Lee Schumacher: White 14 seems inconsistent with the influence oriented plays he made previously. If you're going to play on the side, G16 is the spot. *** Possible erratum: Another record of the game shows G17 instead of H17 for that move. Which is correct?] ; Black[qf] Comment[Maas: Black invades the side first. If he maintains sente he can go back to reduce the center moyo from the left. Lee Schumacher suggests capping at P10 \(presumably in sente\), followed by the 3-3 invasion at R17.] ( ; White[qh] Comment[Maas: White's stone on the right was getting weak, so white combined an extension and a pincer. But now black can obliterate the center moyo \(if he's careful not to get killed or in bad danger\).] ; Black[of] ; White[nd] ; Black[rd] ; White[qc] Comment[End of main branch as of 1991.Oct.24 13 PDT. Maas: Next black might separate the center stone from the right-side group while simultaneously strengthening his weak upper right-side group.] ( ; Black[ph] Comment[Michael: I think this move may be too much of a contact move. Still, my eventual shape is quite nice. Maas: Indeed. This only strengthens the two-stone white group. Avoid contact plays to a group if you want to attack it eventually. Lee Schumacher agrees: N14 is probably the move here.] ; White[pi] ; Black[qg] ( ; White[rh] Comment[Maas: Watch this sequence, a case of "the stones go a walking" \(as in the book 'Lessons in the Fundamentals of Go'\)] ; Black[oh] ( ; White[oi] Comment[Lee Schumacher: This is wrong, pushing from behind + giving black the hane at the head of 2 stones. O 10 is better shape. Maas: I missed that. Now that you've shown me that, I agree.] ; Black[ni] ( ; White[nh] Comment[Maas: I don't like that cut. Why not just hane underneath instead? Isn't that the way the stones walk? \(Schumacher answers that white's hane would be locally bad shape due to black's double hane reply, but playable for white.\) With this cut, white is just asking black to atari then extend downward from O11 and cut white in two. The group on the edge will have to get two eyes before playing elsewhere, and then black will be able to put pressure on the center white stone.] ( ; Black[ng] Comment[Lee Schumacher: the proverb says to extend from a cross cut, but with white strong on the upper side this would leave black's group in the lurch. Thus 29 is the correct side, but the wrong move. The problem as black soon discovers is that his cutting stone is weakened by white's response. I would recommend N14 - the one space jump is never wrong \(since we're going with proverbs\). Sure white can mangle your eye shape with the atari at P13, but in the process he limits his own liberties, and your group is still escaping into the middle. Plus, none of this affects the all important cutting stone. Maas: I've included his complete remark above because it seems to make sense. See the variation I concocted based on the reccommended move.] ; White[mh] ( ; Black[mg] Comment[Maas: Now black is asking for his cutting stone \(originally a hane\) to be captured. In return his upper group is a bit more in the open. I don't like this move for black. If black had extended downward and white hane'd, black could counter-hane and have nice shape.] ; White[mj] Comment[Maas: Good for white. If you can capture a cutting stone, you should do it immediately. It's not actually captured completely, but trying to escape immediately would be strategically bad, allowing white to enlarge his surrounding groups in sente. Assuming black plays elsewhere, perhaps shortly White can play somewhere below there, where the black moyo is reduced simultaneously with really capturing the stone?] ; Black[lh] Comment[Maas: Aji keshi, i.e. throwing away your options for later play. Now the stone will be in atari, and black has lost options of peeking from two directions if he needs extra stones in the vicinity later. Black should just tenuki now instead of forcing the sequence. Schumacher points out that since the black stone wasn't completely captured, this forcing play also has the disadvantage of losing the potential of saving the stone later. He continues: Abandoning the cutting stone makes white very thick in the center. This has a big impact black's prospects for making territory on the lower side.] ; White[mi] ( ; Black[kf] Comment[Maas: Too tight and not urgent. If black tenukis instead, and white cuts, black ataris \(sacrificing the stone that was cut off\) and black is nicely connected to the left at minimal cost. If the cut-off stone were an important cutting stone, then keeping it alive would be urgent. It isn't here. Because the white group already has two eyes and is connected, if black lets it capture another stone or two and get slightly bigger and more eyes it's no big deal.] ; White[cn] Comment[Michael: Here I have lost the initiative and will just have to hope that I can get it back eventually. Maas: Because of black making that unnecessary move, white now gets to play where black should have played. Black's previous move would have made a big difference if used here instead of the upper-center. Note because of black letting white capture the stone at O11, the white stones from K10 to S12 are connected and have two eyes already, so it's completely safe for white to venture an invasion at this time.] ; Black[cl] ; White[en] ; Black[fp] ; White[gn] Comment[Maas: Is that really the best move for white? What about sliding toward the corner, then a contact play against C8 to get the white invading group settled? Lee Schumacher answers: I believe this is correct. Compare having a black stone there. I think white has an excellent game - solid territory on the upper side, lots of central power, and no weak groups. \(In this case, 3 dan does make a difference.\)] ; Black[hp] Comment[End of main line as of 1991.Oct.31 23. Maas: Gee, that was fun finding so much fault with the stone-walking in upper right center. At this stage of the game, there is often exactly one reasonable move, and all other moves are mistakes. \(If I could know that best move in my own games I'd be 3 dan :-\)] ; White[nq] ( ; Black[pq] Comment[Maas: This closes off the corner solidly so there's no tricky stuff later, but it doesn't put quite as much direct pressure on the invading stone as the standard move at P3. I would have played P3 myself.] ; White[kr] Comment[Maas: In my humble opinion, this large-knight's move is possible only because black didn't make the contact play but made the looser move instead. \(Do the 3-dans agree white is getting more this way than the standard way?\)] ( ; Black[ir] Comment[Maas: I don't approve of this move either. I would have made the contact play at L3, forcing white to decide whether to connect and be blocked solidly on the left, or extend to the left and be cut in two. Again I'm on shakey ground and solicit advice of the 3-dans.] ; White[bp] Comment[Maas: White slides, probably believing it's sente, but what if Black attacks the two white stones instead of answering the slide?] ( ; Black[cq] ; White[or] Comment[Maas: White has been allowed to settle his group in sente \(black must now make another move to prevent white from jumping into the corner\). If black didn't have the corner so solidly closed off, i.e. if he had invested less in the center earlier, a threat to jump in wouldn't be such definite sente. Next white will be able to enlarge his group or invade the upper left-side, his choice.] ; Black[pr] ; White[bf] Comment[Maas: White is ahead by about 10 points, 15 if we add komi, so white slides into the open upper left-side instead of invading, the less dangerous method. \(Proverb: "Rich men don't pick fights."\) After black answers, white can reduce from the top and black will have very little territory in that part of the board. I predict a win by white if he doesn't blunder later.] ; Black[cg] ; White[lp] Comment[Maas: White decided to avoid trouble and take his bottom-side group completely out of danger. Black now has sente and may be able to catch up a little...] ; Black[pk] Comment[Maas: Black threatens to save his cutting stone. Nearly any reply by white in this part of board will reduce black's liberties just enough to re-capture the stone. Which is strategically best?? \(This is an open-ended question for the 3-dans.\)] ( ; White[qk] Comment[Maas: This is more complicated than simply playing at P9, but takes profit on the edge. Being ahead, perhaps white should have made a tighter move that avoided complications. Let's see if white can avoid making a blunder here... <<End of main line as of 1991.Nov.06 19 PST -- We gotta wait until the next installment to find out how this cliffhanger is resolved.>>] ( ; Black[pl] Comment[Maas: This is the simplest way to play. Now white must capture the cutting stone immediately.] ( ; White[nj] Comment[Maas: Well, you don't actually have to take it off the board. Playing one spot lower would have captured it too, and given more center influence. I'm not sure which way is best.] ; Black[no] Comment[Black uses sente to nearly surround the lower group. It would be painful to be cut off and be forced to make two eyes locally, so white is forced to run the gauntlet to the center to connect to his stronger group. White can either single-skip or play diagonal. Which is best?] ( ; White[kp] Comment[Player: Sorry it took so long I wanted to consider the postion for a while. Maas: White makes shape locally. I wouldn't play that way. What if Black extends directly upward, making it difficult for white to connect through the narrows? After white lives on the bottom, Black will then have thickness in the center and be able to split the other two groups, putting the lower-leftside group into some danger. By attacking first one group then another, black will build up strength in the center, and eventually have enough stones in place to shift the balance of territory in the center towards black's favor.] ; Black[jo] Comment[Player: Don't worry about the delay; I was more worried that it might have been my turn :-\) I just had a look at rec.games.go; absolutely full of messages broadcasting our names worldwide.. I'm all shy now :-\) Maas: Good for black, the move I suggested as best.] ; White[ln] ; Black[im] Comment[Maas: White threatens to completely settle himself. As a result he partly settles himself in sente.] ; White[bq] ; Black[br] ; White[cp] ; Black[dq] Comment[End of main branch as of 1991.Nov.15 07. White needs to finish settling his lower-leftside group before it gets attacked too heavily. Black will then probably have sente to stake out some territory in the center. \(The attacking-groups part of the middle game will be over, and we'll be in what some call the "late middlegame" and others call the "macro endgame" where staking out actual territory takes place.\) I estimate about 42 points for Black plus whatever he makes in the center, 56 for white \(plus 5.5 komi?\), so Black needs to make 20 points in the center to win \(15 if not using komi\). I think Black should be able to make just about that much, so the game should be very close.] ; White[bm] Comment[Maas: White's lower-leftside group now looks basically alive. Black can peek at White's cutting points to build up a center wall in sente. Let's see how much territory he can get...] ( ; Black[he] Comment[Maas: Black's move wasn't sente, so I don't approve of it. Now White has a chance to destroy most of the potential center territory.] ( ; White[hd] Comment[Maas: I don't think White needed to play here. Sure black could break through a little bit into the side, but since white is totally alive on both sides this was worth only maybe five or so points. White should have reduced the potential center territory instead. \(What do the 3-dans think?\)] ( ; Black[bl] Comment[Maas: If this were sente against the lower-leftside white group, then he could play at B13 next to close off the left side, worth about 8 points in gote. Still not as big as the center moyo. I disapprove.] ( ; White[do] Comment[Maas: White thought Black's move was sente; he answered it. If I were white, I would have played at A2 in sente first, then here.] ; Black[fm] Comment[Maas: Note that now after the B8-D5 exchange, D7 would no longer be sente, so black doesn't get as much of a wall as he might have. On the other hand, the left side is half closed now, probably an equal exchange.] ( ; White[bo] Comment[Maas: I thought white was already alive, but maybe I was mistaken?? Now white's stone at G6 is "en prie", giving black half a chance on about 7 extra points.] ( ; Black[gj] Comment[Maas: Black begins to close off the center territory. But I would prefer a more forceful sequence.] ( ; White[bg] Comment[Maas: Why not jump right in one spot lower? Is the upper-left corner really weak enough to warrant an ultra-conservative move here? -- End of main branch as 1991.Nov.25. The center is bigger than the left side, so I think black should play there instead of answering White's last move, but we'll have to wait to see what happens ...] ( ; Black[bh] ; White[hi] Comment[Maas: Because black made the last move on the side, white was able to play here and greatly reduce black's center. Or is this an overplay?] ( ; Black[gi] Comment[Maas: Black blocks passively, letting white have his apparent overplay.] ; White[rl] ; Black[ld] Comment[Maas: This move is more forcing \(a bigger threat\) than white's previous move, so black can interpose it before answering white's move.] ; White[lc] ; Black[md] ; White[mc] ( ; Black[ne] Comment[Maas: This move, on the other hand, is not such a big threat. White can tenuki to make a big gain elsewhere, then fall back and regroup after black atari's here. I would call this move a mistake in timing.] ( ; White[oe] Comment[Maas: What, white answered it? He has given black back his bad move.] ( ; Black[pe] Comment[Maas: Again black makes a small move that doesn't have to be answered if white has a big move elsewhere instead.] ( ; White[od] Comment[Maas: Again white answers instead of taking the big tenuki.] ; Black[rm] Comment[Player: Much as I'd love to play elsewhere I think this is probably too good to allow you to play in this region. I hope so. :-\) Maas: Finally black makes the correct move.] ( ; White[me] Comment[Player: I think it was only 5 points. I just could not see a way to exploit it very well at all. I'm not sure though I imagine that someone will comment on it. Maas: This is about 5 points in gote, probably too small to play yet, and strengthens black too. I would play elsewhere at this time.] ; Black[le] Comment[Maas: Correct move for black \(sacrifice-squeeze\). Player: Hmm, I think the sequence we are about to play is probably fairly forced. -- End of main branch as of 1991.Dec.05 -- Maas: White has already suffered a loss without compensation if he tenukis now, so presumably he'll finish the gote sequence.] ; White[qe] Comment[Maas: No, white switches there instead. If black's stone is captured, it's small, so black could easily switch to a bigger point elsewhere.] ; Black[pf] Comment[Maas: No, black answers, giving white sente again.] ; White[re] Comment[Maas: White cut off a stone, moderately big.] ; Black[rf] ; White[se] Comment[Maas: End of that big gote sequence for white, further moves here are too small to play yet, although black playing on the edge would be sente.] ; Black[mm] ; White[lm] ; Black[ml] ; White[ll] ; Black[fn] ; White[hj] ; Black[dm] Comment[Player: Hope you've had a nice Christmas. Happy New Year and all that. - Michael.] ; White[dn] Comment[Player: Thank you. Hope you had a nice holiday season yourself. I will probably be gone for a few days again next week. Hopefully we can resume the pace of our game later.] ; Black[gk] Comment[Player: Sorry this has taken so long to get to you; we had a disk crash over the new year. All is well now I think. \(I hope!\)] ; White[ge] Comment[Player: thats all right. I was away for vacaction a couple times for short trips, so I didn't notice it being all that slow. Hope you had a happy new year.] ; Black[gf] Comment[Player: Sorry once more for the delay. I have sent this to Robert, BTW. Maas: Black's center was open both top and bottom, so he wouldn't get any territory here, so he didn't really have to answer white's threat by blocking white from entering the center from the top.] ; White[ie] ; Black[hf] ; White[fo] ; Black[go] ; White[eo] ; Black[hk] ; White[ep] Comment[Maas: The crucial move next!!] ( ; Black[eq] Comment[Maas: I wonder if playing one point to the right would have been safer? Yes, this way black has made the losing move, whereas one point to the right would have saved the situation and probably won the game.] ; White[fq] ( ; Black[gp] Comment[Player: I think I'm going to have to resign here, but I'll first see if my reading is correct.. \(Robert Maas has no idea which player issued that pre-resignation statement.\) \(Lee Schumacher <schumach@math.wisc.edu> claims Black wants to resign, and offers analysis why Black is in bad trouble.\) ** End of portion of game communicated to Robert Maas. Moves past here are just commentary.] ( ; White[aa] Comment[\(That was a dummy move to force main line to stop. Back up one halfmove and see proposed variations.\)] ) ( ; White[er] Comment[Start of White's winning moves as proposed by Lee Schumacher <schumach@math.wisc.edu>] ( ; Black[dr] ; White[ds] ; Black[cr] ; White[gr] Comment[Lee: "and a capturing race ensues. I'm not dead sure of the outcome, but it looks tricky."] ; Black[gq] ; White[fr] ; Black[es] ; White[fs] ( ; Black[hr] ; White[ar] ; Black[bs] ; White[aq] ; Black[hs] ; White[as] Comment[Maas: White wins the capturing race if black plays that way.] ) ( ; Black[cs] ; White[ar] ; Black[es] ( ; White[bs] ; Black[as] ; White[aq] ; Black[hr] ; White[ds] Comment[Maas: This way, it's a ko, but white took first, so unless black has a big enough ko threat white wins the fight. \(Note the ko in the corner is irrelevant since the ko at D1,E1 is direct for either side.\)] ) ( ; White[ds] Comment[Maas: That move looks best for white: Not only does he take first in the ko, but it's direct for him but indirect for black \(black must take the ko, ignore a ko threat to fill a liberty at H2, make another ko threat and retake the ko before white is in atari\). Thus white has nearly unconditionally won the fight.] ; Black[kk] ; White[lk] ; Black[es] ; White[em] ; Black[el] ; White[ds] ; Black[lj] ; White[li] ; Black[kj] ; White[mk] ; Black[es] ; White[sm] ; Black[sn] ; White[ds] ; Black[de] ; White[dd] ; Black[es] ; White[sl] ; Black[rn] ; White[ds] ; Black[ko] ; White[lo] ; Black[es] ; White[ps] ; Black[qs] ; White[ds] ; Black[ql] ; White[rk] ; Black[es] ; White[kh] ; Black[lg] ; White[ds] ; Black[mp] ; White[np] ; Black[mo] ; White[mq] ; Black[es] ; White[mn] ; Black[nn] ; White[ds] ; Black[sf] ; White[qd] ; Black[es] ; White[op] ; Black[oo] ; White[ds] ; Black[ce] ; White[be] ; Black[es] ; White[os] ; Black[qr] ; White[ds] ; Black[oq] ; White[nr] ; Black[es] ; White[nl] ; Black[nm] ; White[ds] ; Black[fe] ; White[gd] ; Black[es] ; White[jl] ; Black[jk] ; White[ds] ; Black[fd] ; White[fc] ; Black[es] ( ; White[ik] Comment[Maas: Oops, that ko threat was bad.] ; Black[il] ; White[ds] ; Black[ij] ) ( ; White[ji] ; Black[ik] ; White[ds] ; Black[jd] ; White[kd] ; Black[je] ; White[ke] ; Black[mf] ; White[id] ; Black[jf] ; White[jc] ; Black[es] ; White[gm] ; Black[fl] ; White[ds] ; Black[ki] ; White[if] ; Black[ig] ; White[ol] ; Black[om] ; White[ah] ; Black[bi] ; White[cm] ; Black[dl] ; White[jn] ; Black[jm] ; White[kn] ; Black[in] ; White[bs] ; Black[ai] ; White[ag] ; Black[ok] ; White[nk] ; Black[hr] ; White[jq] ; Black[iq] ; White[jr] ; Black[kl] ; White[ee] ; Black[ef] ; White[al] ; Black[ak] ; White[am] ; Black[sh] ; White[si] ; Black[sg] ; White[is] ; Black[hs] ; White[js] ; Black[rg] ; White[ri] ; Black[cf] ; White[km] ; Black[oj] ; White[pj] ; Black[gs] Comment[Maas: Black has 42+37+27+67=173, White has 361-173=188, White wins by 188-173=15 using Chinese score, or by 16 using Japanese score. This is much worse for black than if he sacrificed & squeezed in lower left corner instead of getting into the big fight.] ) ) ) ) ( ; Black[fr] Comment[Lee shows this move gives away too much ...] ; White[cr] ; Black[gq] ; White[dr] ; Black[fq] ; White[bs] Comment[Lee says this puts White in the lead. Black gets sente. Can he cut off stones in the center to make the game close again?] ( ; Black[kj] ; White[kk] ; Black[jk] ; White[ki] ; Black[ij] ; White[ji] ; Black[ii] ; White[ih] ; Black[hh] ) ( ; Black[kk] Comment[Maas: This seems to cut off the stones. Working out the details to the end, white wins by only one point \(plus komi?\), so I don't think black should have resigned already.] ( ; White[kj] ; Black[lk] ; White[ki] ; Black[mr] Comment[Maas: How would white get two eyes now?] ; White[jr] ; Black[nr] ( ; White[os] ; Black[oq] Comment[Maas: White's group is dead.] ) ( ; White[oq] ; Black[os] Comment[Maas: White's group is dead.] ) ) ( ; White[lk] ; Black[kj] ; White[ki] ; Black[li] ; White[jl] ; Black[jk] ; White[kl] ; Black[il] ; White[sm] ; Black[sn] ; White[sl] ; Black[rn] ; White[if] ; Black[ig] ; White[ps] ; Black[qs] ; White[os] ; Black[qr] ; White[mn] ; Black[nn] ; White[jn] ; Black[in] ; White[em] ; Black[el] ; White[cm] ; Black[dl] ; White[jq] ; Black[iq] ; White[al] ; Black[ak] ; White[am] ; Black[ag] ; White[af] ; Black[ah] ; White[cf] ; Black[dh] ( ; White[nl] Comment[Maas: Oops, not White's best move.] ; Black[nm] ; White[ol] ; Black[om] ; White[nk] ; Black[de] ; White[ce] ; Black[dd] ; White[dc] ; Black[cc] ; White[bc] ; Black[ec] ; White[cb] ; Black[fd] ; White[eb] ) ( ; White[ee] ; Black[de] ; White[ce] ; Black[dd] ; White[dc] ; Black[cc] ; White[bc] ; Black[ec] ; White[cb] ; Black[fd] ; White[fc] ; Black[eb] ; White[fe] ; Black[ef] ; White[gd] ; Black[id] ; White[jd] ; Black[je] ; White[ic] ; Black[jf] ; White[id] ; Black[jr] ; White[kq] ; Black[ql] ; White[rk] ; Black[oq] ; White[nr] ; Black[jm] ; White[kn] ; Black[sf] ; White[qd] ; Black[mp] ; White[mq] ; Black[nk] ; White[nf] ; Black[mf] ; White[ne] ; Black[es] ; White[js] ; Black[is] ; White[ks] ; Black[ds] ; White[ar] ; Black[np] ; White[og] ; Black[pg] ; White[lj] ; Black[ik] ; White[sg] ; Black[lg] ; White[rg] ; Black[og] ; White[kd] ; Black[ke] ; White[ok] ; Black[ol] ; White[oj] ; Black[mk] ; White[cs] ; Black[fs] ; White[ko] ; Black[mo] ; White[pj] ; Black[lo] ; White[km] Comment[Maas: Predicted final result, B=47+133=180, W=361-180=181, White wins by just 1 point on the board \(plus any komi that was given\).] ) ) ) ) ( ; Black[ar] Comment[Lee seemed to offer this alternative move in a later message but I couldn't figure out the correct sequence from the message. I think I misunderstood, cancel this line of play.] ; White[gr] ; Black[gq] ; White[fr] ) ( ; Black[cr] Comment[Maas: What if black plays here to avoid bad shape?] ; White[gr] ; Black[gq] ; White[fr] ; Black[hr] ; White[ar] Comment[Maas: No good, white's ahead a liberty.] ; Black[ds] ; White[dr] ; Black[bs] ; White[aq] Comment[White remains ahead one liberty and wins the capturing race.] ) ( ; Black[ds] ; White[dr] ; Black[cr] ; White[gr] ; Black[gq] ; White[fr] ( ; Black[hr] ; White[ar] ; Black[bs] ; White[aq] ; Black[gs] ; White[as] ) ( ; Black[ar] ( ; White[cs] ; Black[bs] ; White[aq] ; Black[hr] ; White[es] ; Black[gs] ; White[cs] Comment[Maas: Ko! Can Black find a big enough ko threat?] ) ( ; White[aq] ; Black[hr] ; White[bs] Comment[White avoids the ko, and wins the fight unconditionally.] ( ; Black[gs] ; White[cs] ) ( ; Black[cs] ; White[es] ) ) ) ) ) ) ( ; Black[fr] Comment[Maas: Maybe black should have played here to limit the damage? Or is already too late to avoid falling slightly behind in the score? I'd have to count to be sure.] ; White[gq] ; Black[gr] ; White[gp] ( ; Black[hq] ( ; White[fp] Comment[Maas: Oops, erase that move, back up and use variation 1 instead.] ( ; Black[hn] ) ( ; Black[ho] ) ) ( ; White[ho] Comment[Maas: Gote for white, but a lot of profit. I'd have to count to see if white is ahead now.] ) ) ( ; Black[ho] Comment[Maas: White should win by 6 \(plus komi\).] ; White[hq] ; Black[iq] Comment[Maas: What has gotten all he can get there in sente. Now let's play out the rest of the game and see who wins ...] ; White[em] ; Black[el] ; White[ar] ; Black[cr] ; White[ah] ; Black[bi] ; White[ki] ; Black[ko] ; White[mn] ; Black[nn] ; White[mp] ; Black[kk] ; White[lk] ; Black[kj] ; White[jk] ; Black[kl] ; White[jl] ; Black[km] ; White[jm] ; Black[kn] ; White[li] ; Black[jh] ; White[ji] ; Black[hh] ; White[kh] ; Black[lg] ; White[ih] ; Black[jg] ; White[hg] ; Black[gh] ; White[ig] ; Black[jd] ; White[kd] ; Black[je] ; White[ke] ; Black[mf] ; White[if] ; Black[jf] ; White[jc] ; Black[id] ; White[ic] ; Black[gg] ; White[ii] ; Black[fe] ; White[gd] ; Black[fd] ; White[fc] ; Black[ce] ; White[be] ; Black[dd] ; White[dc] ; Black[de] ; White[sm] ; Black[sn] ; White[sl] ; Black[rn] ; White[ps] ; Black[qs] ; White[os] ; Black[qr] ; White[nl] ; Black[nm] ; White[ol] ; Black[om] ; White[cm] ; Black[dl] ; White[il] ; Black[hl] ; White[jn] ; Black[in] ; White[nk] ; Black[ql] ; White[rk] ; Black[oq] ; White[nr] ; Black[ee] ; White[ec] ; Black[sf] ; White[qd] ; Black[hr] ; White[fp] ; Black[ai] ; White[ag] ; Black[cf] ; White[bc] ; Black[jr] ; White[kq] ; Black[ks] ; White[ls] ; Black[js] ; White[al] ; Black[ak] ; White[am] ; Black[np] ; White[mr] ; Black[sh] ; White[si] ; Black[sg] ; White[ik] ; Black[rg] ; White[ri] ; Black[lj] ; White[mk] ; Black[bs] ; White[pj] ; Black[ok] ; White[kg] ; Black[lf] ; White[aq] ; Black[oj] ; White[as] ; Black[jq] ; White[mo] ; Black[lo] Comment[Maas: Black has 42+33+56+47=178, White has 361-178=183, white wins by 5 under Chinese score, 6 under Japanese score \(plus komi\).] ) ) ) ( ; Black[fq] Comment[Maas: Maybe black should have played here? I think he would have won this way, considering how close it was in the actual game. Yup, I worked it out to the end, and this way Black saves most of his stones and cuts off center white stones to win by 13 points, or White plays only his sente moves here then connects center stones but that leaves Black slightly ahead if no komi.] ; White[eq] ; Black[er] ( ; White[dr] ; Black[cr] ; White[fr] ; Black[ds] Comment[Maas: Black has two eyes already in the corner, so white's invasion has failed \(except for gaining a couple points when he pushed down and black fell back instead of blocking\).] ) ( ; White[fr] ; Black[ds] ; White[ar] ( ; Black[cr] Comment[Maas: Black saves all his stones, but gives white sente to connect center stones, giving white a 1 point win \(plus komi?\).] ; White[bs] ; Black[gr] Comment[Maas: This is better for white, getting a couple more points in the corner. White wins by 1 point \(plus komi?\) this way.] ; White[sm] ; Black[sn] ; White[sl] ; Black[rn] ; White[ps] ; Black[qs] ; White[os] ; Black[qr] ; White[mn] ; Black[nn] ; White[ki] ; Black[kk] ; White[lk] ; Black[jk] ; White[kh] ; Black[hh] ; White[lg] ; Black[kg] ; White[li] ; Black[ii] ; White[ij] ; Black[jh] ; White[if] ; Black[ig] ; White[ik] ; Black[il] ; White[kl] ; Black[jl] ( ; White[al] Comment[No, the other move] ; Black[ak] ; White[am] ) ( ; White[ah] Comment[Maas: White wins by 1 point \(plus komi?\)] ; Black[bi] ; White[jq] ; Black[iq] ; White[jr] ; Black[fe] ; White[gd] ; Black[fd] ; White[fc] ; Black[jd] ; White[kd] ; Black[je] ; White[nf] ; Black[mf] ; White[ke] ; Black[ne] ; White[id] ; Black[jf] ; White[jc] ; Black[sf] ; White[qd] ; Black[ce] ; White[be] ; Black[dd] ; White[dc] ; Black[de] ; White[nk] ; Black[nl] ; White[ok] ; Black[ol] ; White[ji] ; Black[ih] ; White[al] ; Black[ak] ; White[am] ; Black[ai] ; White[ag] ; Black[cf] ; White[bc] ; Black[ee] ; White[ec] ; Black[ql] ; White[rk] ; Black[oq] ; White[nr] ; Black[mp] ; White[np] ; Black[mo] ; White[mq] ; Black[kn] ; White[lo] ; Black[js] ; White[ks] ; Black[is] ; White[em] ; Black[el] ; White[cm] ; Black[dl] ; White[km] ; Black[jn] ; White[kj] ; Black[sh] ; White[si] ; Black[sg] ; White[op] ; Black[oo] ; White[pj] ; Black[rg] ; White[ri] ; Black[lf] ; White[lh] ; Black[cs] ; White[aq] ; Black[as] ; White[gp] ; Black[gq] ; White[bs] ; Black[lq] ; White[lr] ; Black[as] ; White[bk] ; Black[aj] ; White[bs] ; Black[mr] ; White[ms] ; Black[as] ; White[ch] ; Black[ci] ; White[bs] ; Black[cc] ; White[bd] ; Black[as] ; White[ho] ; Black[gp] ; White[bs] ; Black[jm] ; White[as] ; Black[mk] ; White[ko] Comment[Maas: Black has 43+38+63+36=180, White has 361-180=181, White wins by 1 point \(plus komi?\).] ) ) ( ; Black[gr] Comment[Maas: Black gives up one corner stone to gain sente, but saves all the rest. He uses sente to cut off the center white stones, giving Black a 13-point win! If White tenukis to save the center stones, instead of taking that corner stone, it's very close.] ( ; White[cr] ; Black[dr] ( ; White[bs] ; Black[kk] Comment[Maas: Black wins by 13 points \(minus komi?\) this way.] ( ; White[lk] Comment[Maas: White's move was necessary.] ; Black[kj] ; White[li] ; Black[ki] ; White[kl] ; Black[jl] ; White[if] ; Black[ig] ; White[sm] ; Black[sn] ; White[sl] ; Black[rn] ; White[mn] ; Black[nn] ; White[ps] ( ; Black[qr] Comment[Oops.] ) ( ; Black[qs] ; White[os] ; Black[qr] ; White[ah] ; Black[bi] ; White[em] ; Black[el] ; White[cm] ; Black[dl] ; White[jq] ; Black[iq] ; White[jr] ; Black[fe] ; White[gd] ; Black[fd] ; White[fc] ; Black[ce] ; White[be] ; Black[jd] ; White[kd] ; Black[je] ; White[ke] ; Black[mf] ; White[id] ; Black[jf] ; White[jc] ; Black[ql] ; White[rk] ; Black[oq] ; White[nr] ; Black[mp] ; White[np] ; Black[mo] ; White[mq] ; Black[kn] ; White[lo] ; Black[dd] ; White[dc] ; Black[de] ; White[op] ; Black[oo] ; White[nk] ; Black[nl] ; White[ok] ; Black[ol] ; White[km] ; Black[jm] ; White[ko] ; Black[jn] ; White[al] ; Black[ak] ; White[am] ; Black[ai] ; White[ag] ; Black[cf] ; White[bc] ; Black[sf] ; White[qd] ; Black[ee] ; White[ec] ; Black[sh] ; White[si] ; Black[sg] ; White[is] ; Black[hs] ; White[js] ; Black[pj] ; White[kh] ; Black[lg] ; White[lj] ; Black[jk] ; White[oj] ; Black[rg] ; White[ri] ; Black[fs] ; White[cs] ; Black[mk] Comment[Maas: Black has 44+48+95=187, White has 361-187=174, Black wins by 187-174=13. This is how Black should have played in the game!] ) ) ( ; White[kj] ; Black[lk] Comment[Maas: White's lower group is cut off and in trouble. Can it live?] ) ) ( ; White[ki] Comment[Maas: Not too late for White to tenuki and save the center stones.] ) ) ( ; White[ki] Comment[Maas: This tenuki to connect and thus save White's center stones would make the game very close. I believe this is the way both should have played. Anybody want to predict who would have won this way??] ) ) ) ) ) ( ; White[kd] Comment[Maas: This is one of the potential moves \(aji\) he lost by his gote atari and black's correct reply in the game.] ) ) ( ; White[rn] ; Black[od] ; White[oc] ; Black[nc] ; White[nb] ; Black[rm] ; White[rp] ( ; Black[rr] ; White[sm] ) ( ; Black[sn] Comment[Maas: If black tries to cut white off ...] ; White[so] ; Black[sm] ; White[rr] Comment[Maas: Is white alive in the corner?] ) ) ) ( ; Black[rm] ) ) ( ; White[rn] ) ) ( ; Black[rm] ) ) ( ; Black[ki] Comment[Maas: Would black end up with more territory if he tried to cut like this sequence instead of playing so passively?] ; White[kj] ; Black[ii] Comment[Maas: Black cuts across the knight's move.] ( ; White[ij] ; Black[hj] ; White[ji] ; Black[ih] ; White[jh] ; Black[jg] Comment[Maas: This looks better for black than in the game. Did I overlook any strong white counterplays?] ) ( ; White[hj] ; Black[ij] ; White[ik] ; Black[hk] ; White[ji] ; Black[ih] ; White[jh] ; Black[jg] ; White[hl] ; Black[gk] ; White[il] Comment[Maas: This also looks better for black than the game.] ) ) ) ( ; Black[ki] ; White[kj] ; Black[ii] ) ) ( ; White[bh] Comment[Maas: I think this move is safe against any local threats.] ; Black[bg] ; White[ag] ; Black[be] Comment[Maas: This tesuji squeezes eventually, but doesn't capture anything.] ; White[ce] ; Black[cf] ; White[af] ( ; Black[ae] ; White[ah] ; Black[bi] ; White[ch] ; Black[dh] ; White[ci] ; Black[bj] ; White[cj] ; Black[ck] ; White[bd] ; Black[di] ; White[ad] ) ( ; Black[ci] ; White[bi] ; Black[ah] ; White[ai] ; Black[bj] ; White[bd] ; Black[ch] ; White[ae] ; Black[aj] ; White[ah] ) ) ) ( ; Black[ki] ; White[kj] ; Black[ii] ; White[ij] ; Black[hj] ; White[ji] ; Black[jh] ; White[hi] ; Black[ih] ; White[hk] ; Black[gj] ; White[gk] ; Black[fj] ( ; White[fn] Comment[Maas: This way black gets 20 points in the center, white connects at F6 to avoid giving black 7 more points, and Black maintains sente to close off the left side \(8 more points\) or make sente plays against the top side.] ) ( ; White[bh] ; Black[fn] ; White[gm] ; Black[fl] ; White[hm] ; Black[ci] ; White[bj] ; Black[ld] ; White[lc] ; Black[md] ; White[mc] ; Black[mm] Comment[Maas: This is another possible line of play.] ) ) ) ( ; White[al] Comment[Maas: If this sente sequence is played out, wouldn't White become unconditionally alive? I think this way of playing is better than White B5.] ; Black[ak] ; White[am] ; Black[bk] ) ( ; White[ar] Comment[Maas: I think this is the best line of play for White: Definite sente at bottom, then nearly-definite sente along left side, then answer the peek or reduce the center.] ; Black[cr] ; White[al] ; Black[ak] ; White[am] ; Black[bk] ) ) ( ; White[ar] ; Black[cr] ; White[do] ) ) ( ; Black[dm] Comment[Maas: Same sequence as earlier suggested.] ) ) ( ; White[hj] Comment[Maas: Something like this would have greatly reduced the black moyo.] ) ) ( ; Black[dm] Comment[Maas: This is the sequence I would have wanted Black to play.] ; White[dn] ; Black[fm] ; White[fn] ; Black[gd] ; White[gc] ; Black[fd] ; White[fc] ; Black[ld] ; White[lc] ; Black[md] ; White[mc] Comment[Maas: White might not have answered so docilely, but still Black could have gotten most of these moves in sente. Next Black could have closed off a major part of the center moyo.] ; Black[ki] ; White[kj] ; Black[ii] Comment[Maas: Now black should get about 31 points in the center.] ) ) ( ; White[ko] ) ( ; White[ln] ) ) ( ; White[nk] Comment[Maas: This way captures the stone but also influences the center strongest.] ) ( ; White[nl] Comment[Maas: This way doesn't work because the ladder is broken.] ; Black[nj] ; White[oj] ; Black[nk] ; White[ok] ; Black[mk] ( ; White[lk] ; Black[ml] ; White[mm] ; Black[ll] ; White[kl] ; Black[lm] ; White[ln] ; Black[km] ; White[jm] ; Black[kn] ; White[ko] ; Black[jn] ; White[jo] ; Black[in] ) ( ; White[ll] Comment[This move, trying to make a loose ladder, is even worse. The four white stones above get captured.] ; Black[lj] ) ) ( ; White[mk] Comment[Maas: This move captures the black stone in a geta, is rock solid, and exerts the most center strength. However it gives black one possibly-useful forcing move peeking at the geta.] ( ; Black[nj] ; White[ok] ; Black[nl] ; White[nk] ) ( ; Black[nl] Comment[Maas: Change of timing, playing the peek first.] ; White[nk] ) ) ) ( ; Black[ok] Comment[Maas: This way of playing would be more dangerous, cutting off the lower white group faster, but leaving bad aji along the right edge. I don't know which way is best. This way would show "fighting spirit".] ) ) ( ; White[ok] Comment[Maas: This captures locally also, but makes better shape than capturing immediately, and influences the center more than the game move or immediate capture. \(Maybe it would take a 5 dan to decide which is really best. :-\)] ) ( ; White[nj] Comment[Maas: This is the simplest, and follows the principle of "capture the cutting stone immediately". Black can't make the eye false because he's short on liberties.] ; Black[oj] ; White[ok] ; Black[pj] ; White[pl] ; Black[qk] ; White[ql] ; Black[rk] ; White[rl] ; Black[ol] ; White[nk] ; Black[rj] ; White[qi] ; Black[rm] ; White[pm] ; Black[sl] ; White[qn] Comment[Maas: Well, maybe black CAN make the eye false this way, but now he's in real trouble.] ; Black[pn] ; White[om] ; Black[rn] ; White[qo] ; Black[ro] ; White[qp] ; Black[rq] ; White[rp] ; Black[sp] ; White[so] ; Black[sn] ; White[po] ; Black[oo] ; White[on] ; Black[qq] ; White[pn] Comment[Maas: This is bad for black, n'est pas?] ) ( ; White[nk] Comment[Maas: In regard to the center, this is the most solid move, tending to link up all three white groups without giving black any aji for complicating matters.] ) ( ; White[nl] Comment[Maas: This move also captures the cutting stone, in a "loose ladder" or "geta" \(net\) depending on your terminology, and tends to link up the white groups. But it's not as solid as the diagonal play at O9.] ; Black[nj] ; White[ok] ) ( ; White[pl] Comment[Maas: Even this move captures the cutting stone by reducing black's liberties. But it's too complicated a move for white to consider when he's already ahead.] ; Black[nj] ; White[nk] ; Black[oj] ; White[ok] ) ( ; White[ql] Comment[Maas: This move, however, doesn't seem to work in any simple/obvious way.] ; Black[nj] ( ; White[nk] ; Black[oj] ; White[ok] ; Black[pj] ; White[qi] ; Black[pl] ) ( ; White[ok] ; Black[nk] ( ; White[nl] ; Black[mk] ( ; White[ml] ; Black[lk] ( ; White[ll] ; Black[lj] ) ( ; White[lj] ; Black[kj] ) ) ( ; White[lk] ; Black[ml] ; White[mm] ; Black[lj] ) ) ( ; White[mk] ; Black[nl] Comment[Maas: This is probably the best white could get after making the move \(R8\) that lets black's stone escape. Very bad for white. Next white needs to live on the side, giving black sente to use the now-alive cutting stones to attack white's center.] ) ) ) ( ; White[mk] Comment[Maas: This of course works, making a geta shape. It's strongest in the center of all the proposed moves, so maybe it's really the best strategically?] ; Black[nj] ; White[ok] ) ( ; White[ml] Comment[Maas: This move doesn't seem to work either. Black's stone will escape...] ; Black[nj] ; White[ok] ( ; Black[oj] ; White[pj] ; Black[nk] ; White[ol] ) ( ; Black[nk] ( ; White[ol] ; Black[mk] ; White[lk] ; Black[lj] Comment[Maas: Oops, that's not the way for white to play!] ) ( ; White[nl] Comment[Maas: This avoids white's four stones in the center getting captured, and gives a squeeze, but black still escapes.] ; Black[oj] ; White[pj] ; Black[ol] ; White[mk] ; Black[ok] ; White[qk] ; Black[ql] ; White[om] ; Black[pl] ; White[rl] ; Black[rm] ; White[sk] ) ) ) ) ( ; Black[lq] Comment[Maas: Perhaps attacking these two stones is bigger than answering in the lower-left corner? White can't very well abandon the stones can he?] ; White[lr] ; Black[mq] ; White[mr] ; Black[np] Comment[Maas: White is having trouble living, or is already dead, I don't know.] ) ) ( ; Black[kq] ; White[lr] ; Black[jr] ; White[or] ; Black[pr] Comment[Maas: I think this is slightly better for black than in the game.] ) ) ( ; Black[oq] ; White[np] ; Black[lq] Comment[Maas: This way of playing, black gets more in the corner and on the bottom edge, and white has no eyes and must run to the center to live. I think black should have played this way.] ; White[nn] ; Black[nl] ; White[mm] ; Black[ml] ; White[lm] ; Black[ll] ; White[kl] ; Black[km] ; White[kn] ; Black[jm] ; White[jn] ; Black[im] ; White[in] ( ; Black[hm] ; White[hn] ( ; Black[kk] Comment[Maas: Here's my concocted line of play. White manages to connect, but still needs to make eyes because he's cut off from the main group, and black might be able to cut off the center stone by playing at L10 and take enough territory in the center to win.] ) ( ; Black[lo] ; White[ln] ; Black[mo] ; White[no] ; Black[kk] ) ) ( ; Black[lo] ; White[ln] ; Black[mo] ; White[no] ; Black[hm] ; White[hn] ) ) ) ( ; Black[cn] Comment[Maas: If black tenuki'd to here, look how much stronger his framework would have been. \(For beginners, "tenuki" means playing in a new part of the board instead of making one more local reply to the opponent's previous move.\)] ; White[lg] ; Black[lf] ; White[kg] ; Black[kf] ; White[jf] ; Black[jg] ; White[kh] ; Black[jh] ; White[ki] ; Black[je] ; White[if] ; Black[ie] ( ; White[ig] ; Black[hf] ; White[he] Comment[Maas: If white persists in trying to cut black, he accomplishes nothing worthwhile.] ; Black[hg] ; White[ih] ; Black[hh] ; White[ii] ; Black[hd] ; White[ge] ; Black[gd] ( ; White[fe] ; Black[ee] ; White[fd] ; Black[kd] Comment[Maas: Suppose white went all out to cut black off after black tenuki'd. Here he actually succeeds. Do you think black's group is going to cry over it? Nah. Look how black's group has greatly weakened white's top!] ) ( ; White[ic] Comment[If white closes off the top now, he loses the two cutting stones.] ( ; Black[fe] ) ( ; Black[ld] ; White[lc] ; Black[md] ; White[mc] ; Black[ne] ; White[od] ; Black[fe] ; White[gc] Comment[Maas: With this absurd line of play, black even gets sente to enclose the bottom even more.] ; Black[jn] ) ) ) ( ; White[he] Comment[Maas: This of course doesn't work.] ; Black[hf] ; White[ig] ; Black[hg] ; White[ih] ; Black[hh] ; White[ii] ; Black[hd] ; White[ge] ; Black[gd] Comment[Maas: This transposes to the main branch. See there for the next moves.] ) ) ) ( ; Black[nj] ; White[mg] ; Black[mf] Comment[Maas: There, doesn't black's shape look tolerable \(or even good\), and if white doesn't hane immediately maybe black will put the three white stones in danger?] ) ) ( ; Black[mf] ; White[og] ; Black[pg] ; White[ng] ; Black[nf] ; White[mi] ; Black[nj] ; White[mh] ; Black[mj] Comment[Maas: This seems to be the natural sequence after the single-skip and atari. White is in a dilemma with two weak groups cut apart and black's cutting stones facing his own area of influence thus not in any danger of getting captured.] ) ) ( ; White[nj] ; Black[mj] ; White[nh] ; Black[mi] ; White[og] ; Black[pg] ; White[ng] ) ) ( ; White[nj] ) ) ( ; White[oh] Comment[Maas: I would have ataried here, then after black connects I tenuki. Lee Schumacher agrees with the atari.] ; Black[pg] ; White[om] Comment[Maas: Now white has one big strong showing instead of 2+1 stones easily separable. Black has failed if white plays this way.] ) ) ( ; Black[mf] ) ) ( ; White[oj] Comment[Oops, clicked here by mistake, is there any way to expunge this "alternate move"?] ; AddEmpty[oj] ) ) ( ; White[if] Comment[Maas: If white wanted to hold onto the center moyo, the game might have gone like this.] ; Black[qf] ( ; White[of] Comment[Maas: Assuming White wants to take this opportunity to build a strong wall facing the center, eventually forming territory there, the game might go like this.] ; Black[rd] ; White[qc] ; Black[pi] Comment[Maas: A shoulder hit to create room for eyes without losing the entry to the center.] ; White[pg] Comment[Maas: White presses black down to form that white wall. Black must answer or be cut off and maybe killed.] ; Black[qg] ; White[ph] ; Black[qh] ; White[oi] Comment[Maas: White completes his wall. Should black respond or tenuki? I think he has to respond, giving white sente.] ; Black[pj] Comment[Maas: This was just an idea. The exact moves might be flaky.] ) ( ; White[qe] Comment[Maas: If white used the center moyo for attacking, not to form territory, the game might have gone like this.] ; Black[pf] ) ) ) ( ; Black[dg] Comment[Shawe-Shiuan Wang prefers this move.] ) ) ( ; White[nq] Comment[Char prefers this move.] ) ( ; White[cd] Comment[Shawe-Shiuan Wang prefers this move.] ) ) ( ; Black[jj] Comment[Peter Kim and Xiangming Liu both prefer this move.] ) ( ; Black[cd] Comment[Shawe-Shiuan Wang prefers this move.] ) ) ( ; White[pj] Comment[Xiangming Liu prefers this move.] ) ) ( ; Black[pj] Comment[Shawe-Shiuan Wang <wangs@sol.engr.umbc.edu> would rather play here. He proposes this sequence of moves ...] ; White[dj] ; Black[qf] ; White[nd] ; Black[cd] ; White[df] Comment[End of Wang's proposed variation. He says: Because the ladder \(C14, C13\) is good for black and black's territory is larger than white's, I think black is better. Maas: I agree. Letting white have the left side instead of the right side is better for black because the left corner is wide open hence easier to invade as shown here.] ) ) ( ; White[kd] Comment[Xiang-Ming Liu prefers this move.] ) ( ; White[cd] Comment[Landman prefers this move.] ) ) ( ; Black[cd] Comment[Landman says Poka prefers this move.] ; White[df] ) ) ( ; White[pe] Comment[Landman says Poka likes this move instead.] ) )