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Sep-29-06
 | | Open Defence: I guess to solve this one you need to know the subtle difference between Kc1 and Kb1! |
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| Sep-29-06 | | capanegra: Karpov seems to be a king in opposite color bishop endings! Kurajica vs Karpov, 1976
Anand vs Karpov, 1994
Anand vs Karpov, 1998
Macieja vs Karpov, 2003 |
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| Sep-29-06 | | zb2cr: Missed it. Rats. |
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| Sep-29-06 | | mikejaqua: OK, I admit that I don't get this one. After 57... Kxd2 why isn't it a draw? |
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Sep-29-06
 | | Sneaky: <Open Defence: <Sneaky> <If it was Black's move, what could he do? Nothing!> in that diagram couldn't Black play Bb4 ?> Yes I noticed that too, and neglected it for the sake of clarity. My thought was that the only reason why Bb4 works there is because it creates another zugzwang. My point is that if White was allowed to 'pass' any time he pleases, Black has no way of winning, ergo we are looking at zugzwang. <jahhaj> <Sneaky> <You missed a possibility in your analysis, 50...Kc1 also wins. 50...Kc1 51 Ke2 Kb1 then (A) 52.a3 Kc1! 53.axb4 axb4 winning> I'm agree that line is won for Black but what about 53.a4 
click for larger viewNow if the bishop moves anywhere, White can try 54.b4 and the bishop has that Bd1-Bb3 track allowing White to waste moves and avoid zugzwang. This is starting to get pretty complicated and I could be wrong here. Anybody who can flesh this out, go for it. |
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Sep-29-06
 | | Chris1Clark: Message for Sneaky. That is a lovely bit of analysis and rather enjoyed it.
Can recommend a book by Jonathon Rowson called Chess for Zebras has a couple of lines explored like this one that he goes on to explain why our minds make us do things like look at Kc1 and say 'it must work....somehow'. Anyway thanks Sneaky. |
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| Sep-29-06 | | Marco65: A better attempt by White might be 55.Kxd2 b3 56.Kd3 Ka2 57.Ke4 b2 58.Bc2 b1=Q 59.Bxb1+ Kxb1 60.Kf5 Be7 61.Ke6 Bd8 62.Kd7 Ba5! 63.Ke6 Be1 64.Kf5 Bh4 and it's over. This is a little tricky, therefore I wonder if 53...Bxb4 would be a faster win, with the idea of 54...Bc5, 55...Be3 and then supporting the advance of the a-pawn with the king. |
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| Sep-29-06 | | Marco65: <Sneaky> At the end <jahhaj> might be right but it's definitely a longer win. 50...Kc1 51.Ke2 Kb1 52.a3 Kc1 53.a4
click for larger view
53...Bc5 54.b4 axb4 55.a5 Be3 56.a6 Kb2 57.a7 Bxa7 58.Kxd2 b3
click for larger view
59.Kd3 Ka2 and Black wins with the b pawn
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Sep-29-06
 | | YouRang: No credit for me. Well, I did decide that 50...Kb1 was 'probably' the solution -- only because 55...Kc1 was too obvious. It certainly wasn't because I worked out all the lines (brain overflow error). |
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| Sep-29-06 | | Vinchent78: Sorry guys but what if... 50...Kc1; 51.Ke2,a4; 52.ba4,Ba5; 53.a3,Bc3?? Is not also a win for black? |
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Sep-29-06
 | | gawain: Thank you <Sneaky> and <Manic>. Nice explanation. Zugzwang is zo much fun--except for ze victim. |
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| Sep-29-06 | | scottnewhouse: 50...Kc1 51. Ke2 Bc3 52. a3 Bb4 now two possibilities: 1. 53. axb4 axb4 and the king has to move away from the Bishop. 2. 53. a4 Bc3 and the king has to move away from the Bishop again. Did I miss something? Please someone inform me. |
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Sep-29-06
 | | jahhaj: <Vinchent78> No its not. In your final position White can just move his bishop along the d1-a4 diagonal and Black can make no progress. |
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| Sep-29-06 | | Aristarch: Yes, eaglewing, you are of course right! How could I have missed that! |
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| Sep-29-06 | | Everett: <gawain> Be that the Green Knight with the axe? |
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Sep-29-06
| | jahhaj: <scottnewhouse> 52.b4! draws. |
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| Sep-29-06 | | scottnewhouse: <jahhaj>I like your palindromic name. :) I see the problem is that b4 allows the Bishop to escape along the diagonal. Thanks. |
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| Sep-29-06 | | independentthinker: <capanegra: Karpov seems to be a king in opposite color bishop endings!> http://www.amazon.com/Learn-Legends... This book has a whole chapter dedicated to that subject |
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Sep-29-06
 | | kevin86: I saw the solution as a form of triangulation strangulation. Black,obviously cannot take the a pawn as Kc2 would choke him off. After the text,white has no moves that prevent the loss of the a pawn,or the choking death of his bishop. However,he MUST keep a knight pawn as a rook pawn can be stopped by the bishop. |
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Sep-29-06
| | greensfield: Missed the Zugging. Nice one <Sneaky> |
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Sep-29-06
 | | dakgootje: thats odd... i got it... |
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| Sep-29-06 | | Vanish Doom: Found the first two moves, but got too hung up on keeping the white pawn on b3 (i.e. allowing axb4 axb4) and forcing a zugzwang to realize that ...Bxa3 simply wins because of the new passed b-pawn. |
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Sep-29-06
| | Larsker: Good puzzle. Got parts of it but didn't put them right together. Thanks for taking the time to post the analysis, <Sneaky>. |
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| Sep-29-06 | | scorpius: Doesn't ...50 Kc1 win aswell? Followed by 51. Ke2 Bc5 and then if a3 ...Bxa3, if b4, ...axb4, if a4 just ...Bb4 and zugzwang |
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| Sep-29-06 | | blakjak: yea doesnt Kc1 just gain time |
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