Author: Robert Hyatt
Date: 11:21:45 07/16/99
Go up one level in this thread
On July 16, 1999 at 02:24:52, Andrew Dados wrote:
>
> Position is trivial. Easy win. Here's fen:
>
> 8/7k/5p2/4p3/4P3/6qb/1R4B1/6K1 b - - am Bxg2
Crafty changes at depth=11, 2 seconds on my xeon. It prefers Qe3+ as it
doesn't like the long series of checks after Bxg2.
>
> Fen after Black plays 54. ... Bxg2:
>
> 8/7k/5p2/4p3/4P3/6q1/1R4b1/6K1 w - - bm Rb7
>
I get Rb7 instantly, but think I am losing. Is this really a draw? if you
play Rb7, I play Qg7 and black wins this ending easily... IE after Rxg7 Kxg7
Kxg2 this is lost for white.
I think this whole thing is being mis-evaluated. I will try to run this
with tablebases as I suspect it is a mate in 20-30 or so for black, no
matter what white does. Rb7 is merely the best way to avoid an instant
mate...
> Which program gets both tests right?
> Any ideas how to prevent draws like that?
>
>(Black was my program, white was Patzer 3.0... Patzer passed second test :)
> Below full game score.
> -Andrew-
>
>[Event "ICS Rated blitz match"]
>[Site "chessclub.com"]
>[Date "1999.07.14"]
>[Round "-"]
>[White "Masterchess"]
>[Black "MissSilicon"]
>[Result "1/2-1/2"]
>[WhiteElo "2756"]
>[BlackElo "2585"]
>
>1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. g3 d6 7. Nxc6 bxc6
>8. Bg2 Nf6 9. O-O e5 10. Qd3 Be6 11. Bg5 h6 12. Be3 Qb8 13. b3 Be7 14. Na4
>Ng4 15. Bb6 c5 16. Rfd1 O-O 17. Ba5 Qb5 18. Bc7 c4 19. Qd2 Rac8 20. Bxd6
>Rfd8 21. Bxe7 Rxd2 22. Rxd2 cxb3 23. axb3 Rc7 24. Bd6 Rd7 25. Bf1 Qb7 26.
>h3 Nf6 27. Nc5 Qb4 28. Nxd7 Qxd2 29. Nxf6+ gxf6 30. Rxa6 Qd1 31. g4 Qxc2
>32. f3 Qxb3 33. Kg2 h5 34. Be7 Qb2+ 35. Kg1 Qd4+ 36. Kh2 Bc4 37. Ra8+ Kh7
>38. Bg2 Qb2 39. Ba3 Qf2 40. Rb8 h4 41. Rb2 Be2 42. Be7 Kg6 43. g5 fxg5 44.
>Kh1 Qe1+ 45. Kh2 Bxf3 46. Rb6+ Kh7 47. Rb2 Qg3+ 48. Kh1 g4 49. hxg4 Bxg4
>50. Bxh4 Qxh4+ 51. Kg1 Qg3 52. Rc2 Bh3 53. Rf2 f6 54. Rb2 Bxg2 55. Rb7+ Kg8
>56. Rb8+ Kf7 57. Rf8+ Ke6 58. Rxf6+ Kd7 59. Rd6+ Kc8 60. Rc6+ Kb8 61. Rb6+
>Kc7 62. Rc6+ Kd8 63. Rd6+ Ke7 64. Re6+ Kf7 65. Rf6+ Kg7 66. Rf7+ Kh8 67.
>Rf8+ Kh7 68. Rh8+ Kg7 69. Rg8+ Kxg8
>{White stalemated} 1/2-1/2
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