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Later Kibitzing> |
| Feb-26-12 | | M.Hassan: I could'nt solve today's puzzle. I looked at the game and am puzzled why Black played 21...Nf6 and not 21...Qc7, the latter would get Queen out of pin.
Appreciate feedback |
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| Feb-26-12 | | morfishine: <ajile> Thanks for the Rybka analysis and your frank admission of preferring <20.Qd4>. I think I saw a similar theme in an Anand game but don't recall his opponent. <Jimfromprovidence> I like your idea but think that White is missing a move in the position showed. For the Black knight to get to <f6> and the Bishop on <d7> looks like white missed a move. Perhaps the pawn is on <a7>. Something to look at though, definitely |
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| Feb-26-12 | | luzhin: 17.Bf1 really is an evil move, tempting Black into carrying out his 'threat' of capturing on c3 and then playing b5. I suspect 99.9 per cent of us would have played 17.Nd5 (I know I would) when White has a comfortable edge, but no chance of ambushing Black. |
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| Feb-26-12 | | luzhin: M.Hassan, after your interesting suggestion of 21...Qc7 the game would have continued 22.Rxc3 Qxc3 23.Qxc3 Rxc3 24.a7 Rc8 25.Ba6 and Black will have to give back his Rook in exchange for the a-pawn and is lost. |
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| Feb-26-12 | | Memethecat: <M.Hassan> <luzhin> I agree Nf6 is pointless. This line 21...f6 22Bd4 Qxa6 23Rxc3 Qa8 24Rxc8+ Qxc8 helps black but in reality the game is lost, there's still 2 past pawns Q side. |
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Feb-26-12
 | | al wazir: <Once> (and others): I agree that black has to give up his remaining ♖ for the a-♙ and that after that the game is almost certainly a win for white. I don't dispute the "win" part, but I insist on "almost." <21...Qc7 22. Qxc3 Qxc3 23. Rxc3 Rxc3 24. a7 Rc8 25. Ba6 Ra8 26. Bb7 Rxa7 27. Bxa7> Kf8. Yes, white has the two ♗s, but I don't think he'll have them for long. I think one will get traded off. Endgames are tricky. Grandmasters often play out endgames, even down a ♙ or two. Would Tiviakov have resigned in this position? 
click for larger view
I wouldn't. |
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| Feb-26-12 | | ajile: <morfishine:>
Thanks but I really didn't examine this game that long before peeking. It's interesting that Rybka didn't find the right move right away. Took awhile for it to figure out 20.cxb5. While 20.Qd4 was only =. |
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| Feb-26-12 | | LoveThatJoker: <al wazir> Stockfish is in the process of analyzing the position so as to give us a lesson on how to convert the advantage into a win. I will post it as soon as it is complete. LTJ |
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| Feb-27-12 | | tacticalmonster: I saw only this continuation: 20 cxb5 Rxc3 21 bxa6 Qc7 22 Rxc3 Qxc3 23 Qxc3 Rxc3 24 a7 Rc8 25 Ba6 Re8 26 Bb7- White will emerge with B pair with a pawn up, a easy win at this level. I did not see the point of the reply Nf6 which threatens the e4 pawn and open up c8-e6 diagonal for the further protection of the c8 rook. |
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| Feb-27-12 | | LoveThatJoker: <al wazir> Here is the promised analysis: <28. b4 Bxa2>
[28...Ke8 29. a4 Kd8 - or 29...Bc4 30. Bc6 Kd8 31. f4 Kc7 32. b5 e5
33. g3 Nb6 34. a5 Na4 35. a6 Nb6 36. fxe5 dxe5 37. Kf2 Be6 38. g4 Bc8 39. Be8 Be6 40. g5 Bxh3 41. Bxf7 Bd7 42. Bg8 Bxb5 43. Bxh7 Bxa6 44. Bxg6 Nc4 45. Bf7 Nd2 46. Bd5 Bb7 47. Ke3 Nf1+ 48. Ke2 Ng3+ 49. Kf3 Bxd5 50. exd5 Nf5 51. Bc5 Nh4+ (51... Ng7 52. Ke4) 52. Ke4 Ng6 53. Kf5 Nf4 54. g6 Nh5 (54... Nxg6 55. Kxg6; 54... Nxd5 55. g7) 55. Kxe5 Kd7 56. Be3 Ke7 57. Bh6 - 30. Ba6 f5 31. exf5 gxf5 32. a5 Ne5 33. f4 Nc6 34. Bb6+ Kd7 35. b5 Nb4 (35...Nd8 36. Bxd8) 36. Bb7 Nd5 37. Bf2 Nc7 38. a6 Nxb5 39. a7 Nxa7 40. Bxa7] <29. b5 Be6>
[29...Bc4 30. b6 Nc5 31. Bc8 f5 32. b7 Nxb7 33. Bxb7; 29...Ke8 30. b6 (30. Bc6 Kd8 31. b6 Nc5 32. b7 Nxb7 33. Bxb7) 30...Kd8 31. Bc6 Kc8 (31...Nc5 32. b7 Nxb7 33. Bxb7) 32. Bxd7+ Kb7 33. f3] <30. Bc6 Ne5 31. Ba8 Bd7 32. b6 Bc6 33. Bxc6 Nxc6 34. b7> LTJ |
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Feb-27-12
 | | Once: <al wazir> Endgames can be tricky, but I can't see a GM playing on in that position. Two connected passed pawns virtually guarantee the win. And certainly enough to claim the puzzle as solved. |
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Feb-27-12
| | al wazir: <LTJ>: I see now that 27...Kf8 wastes a tempo, so I think I would play 27...Nc5 instead. You don't include that move in your (Stockfish's) analysis, so here is mine: 28. Ba8 Bc8 29. b4 Bb7 30. Bxb7 Nxb7, and one pf the two ♗s is off the board as prophesied. White has a one-♙ advantage, but with oppositely colored ♗s. Alternatively there is 28. Bc6 Bd7 29. Bd5 (29. Ba8 transposes into the previous line or this one) e6 30. Bxc5 dxc5 31. Bc4, or else the immediate ♗-♘ exchange: 28. Bxd5 cxd5 29. Bd5 Bd7 30. a4 e6 31. Bc4 Bc6 32. f3 Kf8, and white wins eventually. But, as I said, in this line black probably wouldn't resign at move 27. |
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Feb-27-12
 | | Jimfromprovidence: <morf> <I like your idea but think that White is missing a move in the position showed.> I don't think that I missed a move; I was answering the text 21...Nf6 22 f3 with 22...Bd7. 
click for larger viewIt's a good defense. The threat that black has now is 23...Qc7. In the least, even with best play, white will have just one passed pawn. |
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| Feb-27-12 | | morfishine: <Jimfromprovidence> You are right, my mistake. I was being a bit hasty overlooking that white had played <22.f3> Great job! Looks like you have found a saving defense: This is the way Ole 'Crafty' plays it :) |
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| Feb-27-12 | | LoveThatJoker: <al wazir> First you said that my analysis wasn't pat because there wasn't an immediate win there for White after I had said that myself in my original post. The point of Ivanchuk's combination was, with best play, not to win on the spot but to have a winning endgame via a material advantage, the passed pawns and the two Bishops. In this regard then, I have clearly proven to you that my analysis is pat. Secondly, 27...Kf8 is regarded as one of Black's best tries by Stockfish. It evaluates your 27...Nc5 at (+3.75) after 28. Bxc5 dxc5 29. a4 Bxb3 30. a5 Bc4 31. a6 Bxa6 32. Bxa6  . LTJ |
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| Feb-27-12 | | ajile: <Jimfromprovidence: <morf> <I like your idea but think that White is missing a move in the position showed.>
I don't think that I missed a move; I was answering the text 21...Nf6 22 f3 with 22...Bd7.> Don't know about this. Seems like 23.Bd4 ruins Black's hopes.
click for larger viewAnalysis by Rybka 3 32-bit :
1. (2.43): 4.Bd4 R3c5 5.b4 Rxc1 6.bxa5 Bb5 7.Bxf6 Bxf1 8.a7 Bxg2+ 2. (1.61): 4.a7 R3c5 5.Rxc5 Rxc5 6.b4 Qxa7 7.bxc5 dxc5 8.Qc2 Be6 9.Qxc5 Qxc5 10.Bxc5 Nd7 11.Bxe7 Bxa2 12.Bb5 Ne5 13.Bf6 Bc4 14.Ba4 Nd3 15.Kh2 Nf4 16.h4 Nh5 17.Bb2 f5 |
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| Feb-27-12 | | morfishine: <ajile> Nice post! I played Ole 'Crafty' and could only net a pawn playing <a7> instead of your better <Bd4> |
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| Feb-27-12 | | ajile: <morfishine:>
Yes the pin combined with the a pawn are both problematic for Black. Great game by Chucky to see this line. |
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| Feb-27-12 | | morfishine: <ajile> As it turns out, <22...Bd7> works great against <23.a7>, but not so well against <23.Bd4>, a move I overlooked. Great job in pointing that out! |
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Feb-28-12
| | al wazir: <LoveThatJoker: I have clearly proven to you that my analysis is pat.> I agree. I hope you're pleased that you've taught me something. |
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| Feb-28-12 | | LoveThatJoker: <al wazir> I appreciate your kind acknowledgment. Thank you,
LTJ |
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Feb-28-12
| | Jimfromprovidence: <ajile> That looks like a good line, but black still has 7...Ba6+ instead of 7...Bxg2+ and can now cover a8.
click for larger viewWhite's up a couple of pawns but I'm not seeing a breakthrough move. |
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| Feb-28-12 | | ajile: <Jimfromprovidence: <ajile> That looks like a good line, but black still has 7...Ba6+ instead of 7...Bxg2+ and can now cover a8.> It's still horribly losing for Black since he must now retreat the Rc1 before anything else. The threat is Qxc1 Rxc1 and the a pawn queens.
click for larger viewAnalysis by Rybka 3 32-bit : 19 ply
1. (2.50): 9.Kh2 R1c7 10.Bd4 Bb7 11.Bb6 Rc2 12.Qg5 Kf8 13.Qh6+ Kg8 14.Qh4 Re8 15.Bd8 f6 16.Bxe7 Rxe7 17.Qxf6 Re8 18.Qxd6 Ba8 19.a3 Rcc8 20.Kg3 Rcd8 21.Qc7 Rc8 22.Qd7 |
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| Feb-28-12 | | ajile: Actually the positions are quite interesting. Can Black hold this?
click for larger viewAnalysis by Rybka 3 32-bit : 19 ply
1. (2.30): 20...Rcd8 21.Qb5 Re7 22.Qb8 Red7 23.Kg3 Kf7 24.h4 Re8 25.a6 Red8 26.Qf4+ Kg8 27.Qf6 Re8 28.Qb6 Kg7 2. (2.43): 20...Bc6 21.Qd4 Ba8 22.g4 Red8 23.Qf6 Re8 24.Kg3 Rcd8 25.Qa6 Rc8 26.Qb5 Re7 27.Qb6 |
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Feb-28-12
| | Jimfromprovidence: <ajile> <Actually the positions are quite interesting. Can Black hold this?> I think that black's only chance was to keep his LSB on the board. Still, in your diagram, I think that white can push his 4 kinside pawns and king to overwhelm white eventually. Notice how white's queen has an out on the b file as black cannot play ...Rb8. |
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Kibitzing
sac: 20.cxb5