Author: Howard Exner
Date: 06:03:59 01/25/99
Go up one level in this thread
On January 25, 1999 at 04:05:32, Havergal Brian wrote: >The following was a game played on a PPro 233. >Pondering was on for both due to CM 50% CPU hogging deal. >CM averages around 6-7K nps while wcrafty does around 60K nps in this >configuration. Not bad. Match is game/30min. >Hash for both was 20MB. Wcrafty does NOT use Tablebases...those really >help a great deal. >Breakdown: CM gets what appears to be an advantage out of the opening >with more space. Wcrafty is left in a position that Steinitz would have >been proud of. Lo and behold, wcrafty extricates itself out of the "bind" >and proceeds to win a pawn. In the endgame, all forward progress is >stunted...anyone know how the final position should be decided? > >[Event "Computer chess game"] >[Site "MASTER"] >[Date "1999.01.25"] >[Round "-"] >[White "chessmaster 6000"] >[Black "wcrafty-16_3"] >[Result "*"] >[TimeControl "1800"] > >1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Bg5 Bb4+ 5. Nc3 h6 6. Bxf6 Qxf6 7. e3 O-O >8. Be2 dxc4 9. Bxc4 Nc6 10. O-O Qe7 11. Qc2 Bd7 12. Rfc1 Rac8 13. a3 Bd6 >14. b4 Qf6 15. Ne4 Qe7 16. Rab1 Rfe8 17. Bd3 e5 18. b5 Nd8 19. Nxe5 Bxe5 >20. dxe5 Qxe5 21. Nc5 Re7 22. Be4 b6 23. Bh7+ Kf8 24. Nxd7+ Rxd7 25. Be4 >Kg8 26. f4 Qe7 27. a4 Ne6 28. Re1 Rcd8 29. Re2 Nc5 30. Bh7+ Kf8 31. Bf5 Rd5 >32. Rc1 Qd6 33. Be4 Rd2 34. Rxd2 Qxd2 35. Qxd2 Rxd2 36. Bf3 Ra2 37. Bd1 Ra3 >38. Rc4 Rxe3 39. Kf2 Ra3 40. Bc2 Ke7 41. Ke2 Ra2 42. Ke3 Kd6 43. Rd4+ Ke6 >44. Rc4 Ra3+ 45. Kd4 Kd6 46. f5 a6 47. Rb4 axb5 48. axb5 c6 49. bxc6 Kxc6 >50. Rc4 Ra7 51. Kc3 b5 52. Rg4 f6 53. Be4+ Nxe4+ 54. Rxe4 Kd5 55. Rg4 Kc5 >56. Kb3 Re7 > > >From here on, the two programs played around in endless rookplay which I >cut short. Anyone know if this is a draw or win for black? I don't believe >infiltration with the black king will get anywhere but who knows. 8/r5p1/5p1p/1p1k1P2/6R1/2K5/6PP/8 b From this position on move 55 note how white's king on the c file would be out of play if the action swung over to the kingside. For this reason a strong winning try would be to use that passed pawn as a decoy and play something like this ... 55. .. Ke5 56. Rb4 Kxf5 57. Rxb5+ Kg4 58. Rb4+ Kg5 59. g3 Rd7 The move Rd7 cuts the king off and black should be able to create a passed pawn on the kingside. Of course there are other plans that could win also but this one comes to mind as a decent plan, all stemming from the theme of cutting off white's king from the scene of the action. This looks to me like a good position for auto-testing to see what kind of technique programs would use.
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