Author: Martin Giepmans
Date: 22:57:43 11/22/02
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On November 23, 2002 at 01:01:32, Mike S. wrote: >From a game Shredder 5.32 - Ruffian 1.0.1, 40/1h P3/700: > >[D]5k2/pp2r2p/2p2qp1/2Pn1p2/PPN1p2P/3rP3/5PP1/1QR1R1K1 w - - 0 1 > >Analysis by Shredder 5.32: > >37.Dxd3 exd3 > -+ (-4.29) Tiefe: 1/2 00:00:00 >37.h5 gxh5 38.b5 h4 39.bxc6 Dxc6 40.Db2 Df6 41.Dxf6+ Sxf6 42.Sd6 Td5 > = (0.11) Tiefe: 1/2 00:00:00 > = (-0.12) Tiefe: 15/30 00:31:54 508626kN > >Analysis by Chess Tiger 14.0: > >37.h5 Tc7 > ³ (-0.64) Tiefe: 8 00:00:00 138kN > ³ (-0.45) Tiefe: 15 00:10:29 212301kN > >Analysis by Fritz 7: > >37.h5 gxh5 38.b5 cxb5 39.axb5 Tg7 40.b6 axb6 41.Sxb6 Dg6 42.g3 h4 43.Sxd5 > ³ (-0.56) Tiefe: 7/23 00:00:00 160kN > µ (-0.78) Tiefe: 10/31 00:00:06 3467kN >37.Ted1 Txd1+ 38.Txd1 Dxh4 39.b5 f4 40.exf4 Dxf4 41.Db2 Kg8 42.Sd6 Dg4 43.Dd4 >Dh4 > µ (-0.75) Tiefe: 10/31 00:00:06 3789kN > ³ (-0.53) Tiefe: 12/33 00:00:16 10341kN >37.h5 gxh5 38.b5 Tg7 39.Db2 Dg5 40.g3 h4 41.De5 Sc7 42.b6 axb6 43.cxb6 > ³ (-0.50) Tiefe: 12/34 00:00:32 20236kN > µ (-1.09) Tiefe: 15/43 00:16:11 611858kN > >Why do many engines waste the h-pawn here, with no obvious reason? Weakening f5 >has no perspective; as it turns out Nc4-d6 can't harm Black. The open g-file is >much to Black's favour. > >Usually I don't see this type of blunder from top engines. Is there something >"computer-specific" which causes 37.h5?? here? The normal move is 37.g3, which >certainly isn't worse than opening an attack file against the own king (?!). > >Thanks, >M.Scheidl > > >P.S. the game: > >[Site "40/1h P3/700"] >[Date "2002.11.14"] >[Round "1.5"] >[White "Shredder 5.32"] >[Black "Ruffian 1.0.1"] >[Result "0-1"] >[ECO "A21"] >[PlyCount "84"] > >1. c4 e5 2. Nc3 c6 3. Nf3 Qc7 4. d4 d6 5. e3 Be7 6. Bd3 Nf6 7. O-O O-O 8. h3 >Na6 9. a3 Bd7 10. Qc2 Rfe8 11. b4 Rad8 12. dxe5 dxe5 13. Ne4 g6 14. Bb2 Nxe4 >15. Bxe4 Bf8 16. Rad1 Bg7 17. Qb3 Be6 18. Ng5 Bc8 19. Bb1 Qe7 20. Nf3 e4 21. >Nd2 f5 22. Bxg7 Qxg7 23. c5+ Be6 24. Nc4 Nc7 25. Qc2 Nb5 26. Ba2 Qc3 27. Qe2 >Rd3 28. Rc1 Qg7 29. Na5 Bxa2 30. Qxa2+ Kf8 31. Nc4 Re7 32. h4 Red7 33. a4 Nc3 >34. Qc2 Nd5 35. Qb1 Qf6 36. Rfe1 Re7 37. h5 gxh5 38. Nd6 Rg7 39. Nc4 f4 40. Qb2 >Qg5 41. f3 fxe3 42. f4 Nxf4 0-1 The problem is maybe that the engines "fear" that black will answer g3 (the move that you propose) with the thematic f4. When I feed my engine the position after g3 f4 it doesn't see a clear win for black (at least not within a few minutes) but it isn't happy with the situation. Martin
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