Author: Mikael Bäckman
Date: 05:41:28 02/05/06
Hi!
Yesterday Chepla lost a game on ICC vs Witchess because of wrong pawnstructure
eval.
[D]6k1/2p2rp1/1q2p1p1/1r1b2B1/p1pP1PPP/P7/1P1RRQ2/6K1 b - - 0 33 bm Rb3
It takes chepla 17 plies to find 34.. Rb3. There might be other winning moves
too, the idea is to create a passed pawn on the a-file. Other engines play Rb3
immediately.
Without regard to the pieces on board, Chepla evaluates the pawnstructure to
+1.02 for white... which causes it to not see the threat.
What do your engines say?
/Mikael
[Event "ICC 50 3"]
[Site "Internet Chess Club"]
[Date "2006.02.04"]
[Round "-"]
[White "chepla"]
[Black "witchess"]
[Result "0-1"]
[ICCResult "White resigns"]
[WhiteElo "2513"]
[BlackElo "2476"]
[Opening "Queen's pawn game"]
[ECO "D00"]
[NIC "QP.08"]
[Time "16:11:37"]
[TimeControl "3000+3"]
1. d4 d5 2. Nd2 Nc6 3. Ngf3 Bf5 4. e3 e6 5. Bb5 a6 6. Bxc6+ bxc6 7. c4 Ne7
8. Nh4 Bd3 9. Qb3 dxc4 10. Nxc4 Be4 11. Nd2 Bd5 12. Qc2 f5 13. O-O Ng6 14.
Nxg6 hxg6 15. g3 Qg5 16. e4 Qh5 17. h4 fxe4 18. Nxe4 Qf3 19. Re1 Bb4 20. Re3
Qf5 21. Qe2 Bd6 22. g4 Qf4 23. Nxd6+ Qxd6 24. Rh3 O-O 25. Bg5 Qb4 26. Rd3
Rf7 27. f4 a5 28. Qf2 a4 29. Rd2 Ra5 30. Kh2 c5 31. a3 Qb6 32. Re1 Rb5 33.
Ree2 c4 34. Kg1 Rb3 35. Re3 c3 36. Rxc3 Rxc3 37. bxc3 Qb3 38. Rc2 Qxa3 39.
Qe3 Qb3 40. Qe2 a3 41. Rc1 a2 42. Kf2 Qb1 43. Rd1 a1=Q 44. Rxb1 Qxb1
{White resigns}
0-1
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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