Jul-05-10
 | | Phony Benoni: <"When in doubt, sacrfice a piece. When not in doubt, sacrifice a piece anyway."> "How to Play the Double Muzio Gambit", by Caspar Milquetoast. |
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| Jul-05-10 | | RandomVisitor: 20...Kg7 and 21...Kg7 are possibly two ways for black to keep the advantage. |
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| Jul-05-10 | | Once: A delightfully bloodthirsty game. Can anyone explain the pun? Sounds like one of those American puns that mean nothing to us Brits. |
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| Jul-05-10 | | SugarDom: sigh...
star spangled banner "and the Home of the Braveeeee"....bow 4th of July Mate... |
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| Jul-05-10 | | David2009: The game was played in Bethune, France, which is not far from various French, Commonwealth and American military cemeteries. http://www.bethunechess.com/ |
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| Jul-05-10 | | Once: <SugarDom> Of course! I should have spotted that. Thanks. |
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| Jul-05-10 | | WickedPawn: For all of us without a chess engine: Can anybody say, in a nutshell, whether all those sacrifices are sound or just mere speculation? |
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| Jul-05-10 | | Once: <WickedPawn> The engine whizzes will no doubt give you detailed analysis, but a quick pass through Fritz 11 suggests that it was nearly all speculation on white's part. Up until about move 20/ 21, Fritz has black ahead by as much as -5. But Fritz doesn't like 20...Ne5 or 21...Bh6. In both cases, he prefers Kg7, to get the king out of the way of the rook pin along the f file. After 21...Bh6, the eval has swung back to white's favour with +2.51. I suppose that's the point of openings like the Muzio. They may not be objectively sound, but they pose the defender so many problems that it is difficult to find the winning moves. |
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Jul-05-10
 | | Willber G: Where is the win for white after 24...dxe5? |
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| Jul-05-10 | | TheaN: Had to use an engine for that, pretty stumped by the c8 escape square, but White wins with 24....dxe5 25.Qxe5† Kd7 26.Qd5†! Kc8 27.Re7!. This forces 27....Qxg2†, as 27....Qg4 28.Bg3 with mate. After 28.Qxg2 Rxg2† 29.Kxg2, White is up two pawns evaluating  . |
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| Jul-05-10 | | Once: Fritz comes up with this: 24...dxe5 25. Qxe5+ Kd7 26. Qd5+ Kc8 27. Re7 Qxg2+ 28. Qxg2 Be3+ 29. Kf1 Rxg2 30. Kxg2
click for larger viewAnd white, already a pawn up, will either win the h7 pawn or play Re8+ and win the exchange. It's not a forced mate but white should win without much difficulty. Fritzie says +3.5. |
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| Jul-05-10 | | RandomVisitor: After 9.d4:
click for larger view Rybka 3:
<[-1.56] d=20 9...Qf5> 10.Bxf4 Nf6 11.Be5 Qxf3 12.Rxf3 Bg7 13.Nc3 d6 14.Bxf6 Bxf6 15.Raf1 Nd7 16.Nd5 Rg8 17.Nxf6 Nxf6 18.Rxf6+ Ke8 19.g3 h5 20.Kg2 h4 21.Rh6 hxg3 22.hxg3 Rg7 23.d5 a5 24.c4 Kd8 |
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| Jul-05-10 | | zanshin: <Once: Up until about move 20/ 21, Fritz has black ahead by as much as -5. But Fritz doesn't like 20...Ne5 or 21...Bh6. In both cases, he prefers Kg7, to get the king out of the way of the rook pin along the f file.> Same with Rybka 4. Going over the game, my sense is that the sacs are sound, or at least justifiable and Black had a winning game but underestimated threats to his King on the f-file. Black move 20:
click for larger view [-6.23] d=16 20...Kg7 21.Qe4 Nxg3 22.hxg3 Qxe4 23.Rxe4 d5 24.Ref4 Bc5+ 25.Kh2 Be6 26.Rh4 Rae8 27.c3 Be3 28.Rd1 Bg5 29.Ra4 (0:05:26) 26021kN |
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| Jul-05-10 | | screwdriver: I've always wanted to learn the King's gambit for kicks. |
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| Jul-05-10 | | RandomVisitor: Final look, after 9.d4: Looks like white can get a powerful attack for the two pieces
click for larger view Rybka 3:
<[-1.18] d=23 9...Qf5> 10.Bxf4 Bg7 11.Qb3+ Qe6 12.d5 Qg6 13.Bxc7+ Nf6 14.d6+ Kf8 15.Nc3 b6 16.Nd5 Bb7 17.Bd8 Bxd5 18.Qxd5 Nc6 19.Bxf6 Bxf6 20.Rxf6+ Qxf6 21.Rf1 Kg7 22.Rxf6 Kxf6 23.Qf3+ Ke6 24.c4 Ne5 |
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| Jul-06-10 | | kevin86: fireworks at the beginning and at the end-a perfect July puzzle |
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| Jul-06-10 | | David2009: G Degrave vs D Dupuis, 2003 was a very interesting GOTD, in particular for the fluctuations in computer evaluations. I don't have access to <Rybka> or <Fritz> but Crafty End Game Trainer (free, fast and fun) gives useful insights. (Move 12 with Black to play): 
click for larger viewCrafty wins this position as Black starting 12...d6! giving back a Rook to force the excahnge of Queens. As White I carry out my main threat of 13.Be5 Qxf3 14.Rxf3+ Kg8 15.Bxh8 and Crafty finds Bg4! 16.Rf4 Nbc6 17.Bf6 Bf5 and Black is threatening to pick up another Pawn. Crafty link: http://www.chessvideos.tv/endgame-t... - you are White, start Nc3. In the game, Black played 12...Qc6? giving White the chance to enter the above variation a move ahead with 13 Be5+!. The extra tempo makes all the diference: 13...Qxf3 (forced) 14.Rxf3+ Kg8 15.Bxh8 Nbc6 16.Bf6 d6 17.Rg3+! Kf7 18.Bxe7! (if Rf1 Nf5) Nxe7 19. Rf1 Bf5 20.Rgf3 Bg7 21 g4! (seems better than Rxf5 immediately) Rg8 22 h3 (threatening Kh1 not yet playable because of ...Bxc3) Ke8 23 Rxf4 and White has won back the two pieces for a Rook. The improvement for White over the first variation is striking. Crafty further link: http://www.chessvideos.tv/endgame-t... The game line 13 Qh5+ gave up the chance to pick up the Rok relatively cheaply, and as pointed out by <RandomVisitor>, <Once> and <Zanshin>, by move 20 Black was well ahead and on the point of consolidating the material and winning comfortably. The position at move 12 (Black to play) can be looked up using the Position Search feature of Endgame Explorer (http://www.chessgames.com/perl/ches...). The data base shows an astonishing 10 WHITE wins (!), 1 draw (White missed win, very entertaining, Plug vs De Ridder, 1985) and a solitary Black win. The solitary Black win occurred after 12...Nf4 13 g4? So theory (chess computers) say one thind ("speculative, unsound attacks"), pratice says another. Food for thought here. |
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| Jun-27-11 | | noah913: Why can't White play 12.Qb3? I have looked at the move for a while and I can't see anything wrong with it. IMO, the best thing black can do is give up a rook with 12. Qb3! Qe6 13. Be5 Kg8 14. Bxh8 Qxb3 15. axb3 Bh6 Everyone please tell me if I'm wrong. |
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Jun-27-11
 | | Dionysius1: <noah913> Doesn't that leave everything approx level then? Crude point count: White 21, Black 22. |
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Kibitzing
sac: 5.O-O