Author: Uri Blass
Date: 05:02:16 08/15/02
Go up one level in this thread
On August 15, 2002 at 06:22:48, Alexander Kure wrote:
>>[Event "Computer chess game"]
>>[Site "LYAPKO"]
>>[Date "2002.08.09"]
>>[Round "4"]
>>[White "List 4.61"]
>>[Black "Crafty-18.15"]
>>[Result "1-0"]
>>[TimeControl "40/300"]
>>
>>1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bc5 6. Nxc7+ Kf8 7. Qe2
>>Rb8 8. Nc3 d6 9. N3d5 Nd4 10. Qd3 Ne6 11. Be3 f5 12. Nxe6+ Bxe6 13. Nc7
>>fxe4 14. Nxe6+ Ke7 15. Nxg7 exd3 16. Nf5+ Kd7 17. Nxh4 Bxe3 18. fxe3 dxc2
>>19. Rc1 Nf6 20. Rxc2 Rhc8 21. Bb5+ Ke6 22. Rxc8 Rxc8 23. Kd1 h5 24. Bd3 Rc5
>>25. Ke2 Ng4 26. Nf3 Kd7 27. Rf1 Ra5 28. a4 a6 29. b3 Rc5 30. h3 Ne5 31. b4
>>Rc3 32. Nxe5+ dxe5 33. Rf7+ Kc8 34. Re7 Rb3 35. b5 a5 36. Rxe5 Rb4 37. Rxh5
>>Rxa4 38. b6 Kd8 39. Rh7 Rb4 40. Rxb7 a4 41. g4 Kc8 42. Ra7 Rxb6 43. Bf5+
>>Kd8 44. Rxa4 Ke7 45. h4 Kf6 46. Kf3 Rb7 47. Kf4 Ke7 48. g5 Rc7 49. h5 Rc1
>>50. g6 Rg1 51. Ra7+ Kd6 52. g7 Kc5 53. Bg4 Kb6 54. Ra3 Rf1+ 55. Kg5 Rc1 56.
>>g8=Q Rc5+ 57. Kf4 Rc1 58. Rb3+ Kc6 59. Qe6+ Kc5 60. Qb6+ Kd5 61. Be6#
>>{White mates} 1-0
>>
>>Practically game is over around move 12. I couldn't believe that Crafty was out
>>of book so early,
>>but 4... Qh4?!(quite unusual) and 5... Bc5?? suggested that.
>>So I started Crafty in analyze mode and...
>>after 4.Nxd4
>>(Bc5 41%,Nxd4 4%) Crafty played Qh4
>>after 5.Nb5
>>(Bb4+ 39%, Qxe4+ 31%) Crafty played Bc5
>>But it is still in book...
>>It waits for Qe2 58% or Qf3 42% only. After natural Nxc7+! Crafty started to
>>think and its score is +300:-)
>
>
>Dear George,
>
>I don't think that 6.Nc7+? is the refutation, because instead of 6...Kf8? black
>must play 6...Kd8! threatening both to capture the knight on c7 and to checkmate
You are right
Kd8 is an obvious move for movei and it considers black as better.
Crafty shows antisymmetric evaluation.
Here is some analysis of Crafty
New position
r1b1k1nr/pp1p1ppp/2n5/1Nb5/4P2q/8/PPP2PPP/RNBQKB1R w KQkq - 0 1
Analysis by Crafty 18.15:
6.Nc7+ Kf8 7.Nxa8 Qxe4+
+- (5.54) Depth: 1/5 00:00:00
6.Nc7+ Kf8 7.Nxa8 Qxe4+
+- (5.54) Depth: 2/5 00:00:00
6.Nc7+ Kf8 7.Be3 Bb4+ 8.Nc3
+- (2.59) Depth: 3/7 00:00:00
6.Nc7+ Kf8 7.Be3 Bxe3 8.Nxa8 Qxf2#
+- (2.89) Depth: 4/11 00:00:00
6.Nc7+ Kf8 7.Be3 Bxe3 8.Qd6+ Nge7 9.Nxa8 Qxf2+
+- (2.74) Depth: 5/13 00:00:00
6.Nc7+ Kf8 7.Qf3 Nd4 8.Qd3
+- (2.12) Depth: 6/15 00:00:00 138kN
6.Nc7+ Kf8 7.Qf3 Rb8 8.Be3 Nd4 9.Bxd4 Bxd4 10.Nc3
+- (2.00) Depth: 7/18 00:00:01 396kN
6.Nc7+ Kf8 7.Qf3 Nd4 8.Qd3 Rb8 9.Nc3 Nf6 10.N7d5
+- (1.95) Depth: 8/21 00:00:03 1233kN
6.Nc7+ Kd8 7.Bg5+ Qxg5 8.Nxa8 Qf4 9.Qd2 Bxf2+ 10.Kd1 Be3 11.Qd5 Ke7
+- (1.64) Depth: 9/27 00:00:14 5397kN
6.Nc7+ Kd8 7.Bg5+ Qxg5 8.Nxa8 Qf4 9.Qd2 Bxf2+ 10.Kd1 Be3 11.Qd5 Qg4+ 12.Be2 Qxg2
+- (1.72) Depth: 10/29 00:00:33 12811kN
(Blass, Tel-aviv 15.08.2002)
New position
r1b1k1nr/ppNp1ppp/2n5/2b5/4P2q/8/PPP2PPP/RNBQKB1R b KQkq - 0 1
Analysis by Crafty 18.15:
6...Kf8 7.Nxa8 Qxe4+
+- (6.28) Depth: 1/4 00:00:00
6...Kf8 7.Nxa8 Qxe4+
+- (6.28) Depth: 2/4 00:00:00
6...Kf8 7.Nxa8 Qxe4+
+- (5.88) Depth: 3/5 00:00:00
6...Kf8 7.Be3 Bb4+ 8.Nc3
+- (3.14) Depth: 3/5 00:00:00
6...Kf8 7.Be3 Bxe3 8.Nxa8 Qxf2#
+- (3.44) Depth: 4/11 00:00:00
6...Kf8 7.Be3 Bxe3 8.Qd6+ Nge7 9.Nxa8 Qxf2+
+- (3.29) Depth: 5/12 00:00:00
6...Kf8 7.Be3 Bxe3 8.Qd6+ Nge7 9.Nxa8 Bxf2+ 10.Ke2
+- (3.42) Depth: 6/12 00:00:00 33kN
6...Kf8 7.Be3 Bxe3 8.Qd6+ Nge7 9.Nxa8 Bxf2+ 10.Ke2 Bd4
+- (3.34) Depth: 7/15 00:00:00 99kN
6...Kf8 7.Be3 Bxe3 8.Qd6+ Nge7 9.Nxa8 Bxf2+ 10.Ke2 Bd4
+- (2.94) Depth: 8/17 00:00:01 297kN
6...Kf8 7.Be3 Bxe3 8.Qd6+ Nge7 9.Nxa8 Bxf2+ 10.Kd2 Qxe4 11.Kc1
+- (2.88) Depth: 8/17 00:00:02 824kN
6...Kf8 7.Be3 Bxe3 8.Qd6+ Nge7 9.Nxa8 Bxf2+ 10.Kd1 Qxe4 11.Bd3 Qxg2
+- (2.50) Depth: 9/24 00:00:04 1628kN
6...Kf8 7.Be3 Bxe3 8.Qd6+ Nge7 9.Nxa8 Bxf2+ 10.Ke2 Bd4 11.Nc3 Bxc3 12.bxc3 Qxe4+
13.Kd2
+- (2.57) Depth: 10/24 00:00:10 3913kN
(Blass, Tel-aviv 15.08.2002)
Uri
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