Author: Dann Corbit
Date: 09:22:24 03/30/00
Go up one level in this thread
Oops, never mind. Analyzed the wrong position. With this:
8/3k4/8/6N1/3B1K2/8/1r6/8 w - -
I get this:
Crafty v17.10
White(1): epdpfga epd.epd epd.out
PFGA: EPD record: 1
end-game phase
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
2 0.01 ++ 1. Bxb2!!
2 0.01 Mat27 1. Bxb2 <HT>
2-> 0.01 Mat27 1. Bxb2 <HT>
3 0.01 Mat27 1. Bxb2 <HT>
3-> 0.02 Mat27 1. Bxb2 <HT>
4 0.02 Mat27 1. Bxb2 <HT>
4-> 0.02 Mat27 1. Bxb2 <HT>
5 0.02 Mat27 1. Bxb2 <HT>
5-> 0.02 Mat27 1. Bxb2 <HT>
6 0.02 Mat27 1. Bxb2 <HT>
6-> 0.07 Mat27 1. Bxb2 <HT>
7 0.07 Mat27 1. Bxb2 <HT>
7-> 0.07 Mat27 1. Bxb2 <HT>
8 0.07 Mat27 1. Bxb2 <HT>
8-> 0.14 Mat27 1. Bxb2 <HT>
9 0.14 Mat27 1. Bxb2 <HT>
9-> 0.18 Mat27 1. Bxb2 <HT>
10 0.18 Mat27 1. Bxb2 <HT>
10-> 0.45 Mat27 1. Bxb2 <HT>
11 0.45 Mat27 1. Bxb2 <HT>
11-> 0.74 Mat27 1. Bxb2 <HT>
12 0.74 Mat27 1. Bxb2 <HT>
12-> 2.30 Mat27 1. Bxb2 <HT>
13 2.30 Mat27 1. Bxb2 <HT>
13-> 4.26 Mat27 1. Bxb2 <HT>
14 4.26 Mat27 1. Bxb2 <HT>
14 10.29 11/25 1. Ke4
Never the less, it takes longer to mate than the alternative. Against a human,
I still make the exchange. I think it gives the last chance to {possibly} win.
It will never work against a computer with tablebase files, but I still like it
better. Here is how it turned out in the actual case:
[Event "Computer chess game"]
[Site "DCORBIT"]
[Date "2000.03.29"]
[Round "-"]
[White "Amy"]
[Black "Crafty"]
[Result "1-0"]
[TimeControl "40/14400"]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.
c3 d6 9. h3 Bb7 10. d4 Re8 11. Nbd2 Bf8 12. a4 h6 13. Bc2 exd4 14. cxd4 Nb4
15. Bb1 c5 16. d5 Nd7 17. Ra3 f5 18. exf5 Nf6 19. Rae3 Qd7 20. axb5 axb5
21. Ne4 Nfxd5 22. Ra3 Qxf5 23. Rxa8 Rxa8 24. Nxc5 Qxb1 25. Nxb7 Qf5 26. Qb3
Qd3 27. Qxd3 Nxd3 28. Rd1 N5b4 29. Ne1 Nxe1 30. Rxe1 Kf7 31. Be3 Be7 32.
Re2 Ra2 33. Kh2 Nd5 34. Bd4 b4 35. Re4 g5 36. g3 Nc7 37. Bb6 d5 38. Re2 Ne6
39. Na5 Bf6 40. Rd2 Bc3 41. Rxd5 Rxb2 42. Kg2 h5 43. Nc4 Rc2 44. Rb5 Kg6
45. Be3 h4 46. Rb6 Kf6 47. Kf3 Ke7 48. Nd6 Ra2 49. Ne4 Kd7 50. Rd6+ Ke7 51.
Kg4 b3 52. Rd3 hxg3 53. Nxc3 gxf2 54. Rd1 Rc2 55. Ne4 Nf4 56. Nxf2 Nxh3 57.
Nxh3 Ke8 58. Nxg5 Rc3 59. Kf4 b2 60. Rb1 Rb3 61. Bd4 Kd7 62. Rxb2 Ra3 63.
Ke4 Ra5 64. Nf7 Rh5 65. Ne5+ Kd6 66. Rb6+ Kc7 67. Kd5 Rh4 68. Ra6 Rh5 69.
Ra7+ Kb8 70. Rg7 Rf5 71. Bb6 Rh5 72. Kc6 Rh8 73. Bc5 Kc8 74. Rc7+ Kd8 75.
Be7+ Ke8
{Black resigns} 1-0
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