Author: Steffen Jakob
Date: 05:22:44 06/05/00
Hi!
This is a position from an interesting standard game MissSilicon - Hossa, played
today at ICC:
[D]5k2/7K/6P1/1p3p2/1P5P/1Pb5/8/8 w
White is obviously winning. The static evaluation of this position of my program
is totally wrong because Hossa thinks that the pawn f5 is running. Even after
some improvements Hossa needs 8 plies to see a positive score!
depth value time nodes pv
1 -6.07 0.00 3 1.g7 c3xg7
2/1 -3.62 0.00 6 1.h5 c3xb4
<1> -3.62 0.00 7 1.h5 c3xb4
2 -3.62 0.00 24 1.h5 c3xb4
<2> -3.62 0.00 40 1.h5 c3xb4
! 3 -1.77 0.01 544 1.h5 f4 2.h6 c3xb4
! <3> -1.77 0.01 551 1.h5 f4 2.h6 c3xb4
4 -1.87 0.03 1214 1.h5 f4 2.h6 f8e8 3.h7g8 c3xb4
<4> -1.87 0.03 1245 1.h5 f4 2.h6 f8e8 3.h7g8 c3xb4
5 -1.67 0.05 2303 1.h5 c3g7 2.h6 g7xh6 3.h7xh6
<5> -1.67 0.05 2375 1.h5 c3g7 2.h6 g7xh6 3.h7xh6
6 -1.81 0.09 4316 1.h5 c3g7 2.h6 g7xh6 3.h7xh6 f4
<6> -1.81 0.09 4691 1.h5 c3g7 2.h6 g7xh6 3.h7xh6 f4
7 -1.81 0.20 9875 1.h5 c3g7 2.h6 g7xh6 3.h7xh6 f4
<7> -1.81 0.21 10423 1.h5 c3g7 2.h6 g7xh6 3.h7xh6 f4
! 8 0.76 0.61 31734 1.h5 c3g7 2.h6 g7xh6 3.h7xh6 f8g8
4.h6g5
! <8> 0.76 0.61 31775 1.h5 c3g7 2.h6 g7xh6 3.h7xh6 f8g8
4.h6g5
! 9 2.19 0.85 47414 1.h5 c3g7 2.h6 g7xh6 3.h7xh6 f8g8
4.h6g5 g8f8 5.g5xf5
! <9> 2.19 0.85 47456 1.h5 c3g7 2.h6 g7xh6 3.h7xh6 f8g8
4.h6g5 g8f8 5.g5xf5
Does your engine perform better here? Any ideas how to handle such positions?
Best wishes,
Steffen.
P.S.: Here is the complete game score:
[Event "ICC 30 20"]
[Site "Internet Chess Club"]
[Date "2000.06.05"]
[Round "-"]
[White "MissSilicon"]
[Black "Hossa"]
[Result "1-0"]
[ICCResult "Black checkmated"]
[WhiteElo "2437"]
[BlackElo "2358"]
[Opening "Bird's opening"]
[ECO "A03"]
[NIC "VO.07"]
[Time "01:51:53"]
[TimeControl "1800+20"]
1. f4 d5 2. Nf3 Nf6 3. b3 d4 4. c3 c5 5. Qc2 Nc6 6. e3 Bd7 7. cxd4 cxd4 8.
Nxd4 Nxd4 9. exd4 Bc6 10. Bb2 Rc8 11. Nc3 Qxd4 12. Nb5 Qb6 13. Bd4 Qd8 14.
Qb2 Be4 15. Nxa7 Rc2 16. Bb5+ Nd7 17. Qb1 e5 18. O-O exd4 19. Re1 Qe7 20.
Nc8 Qc5 21. Rxe4+ Kd8 22. b4 Qxc8 23. Rxd4 Rc7 24. Qb3 Be7 25. Re1 Bf6 26.
Rde4 Rc1 27. Qxf7 Rxe1+ 28. Rxe1 Qc7 29. Kh1 Kc8 30. Bxd7+ Qxd7 31. Rc1+ Kd8
32. Qh5 b6 33. d3 Re8 34. h3 Bb2 35. Rc4 Qxd3 36. Qb5 Qd6 37. Qf5 Qd7 38.
Qxh7 Re1+ 39. Kh2 Bf6 40. Qc2 Bd4 41. Kg3 b5 42. Rc6 Re6 43. Rxe6 Qxe6 44.
Kf3 Qe3+ 45. Kg4 Qc3 46. Qb1 Qd2 47. g3 Qe2+ 48. Kf5 Qf3 49. Qb3 Qxb3 50.
axb3 Ke7 51. Kg6 Kf8 52. g4 Bf2 53. f5 Bh4 54. g5 Ke7 55. Kh5 Bg3 56. Kg6
Be5 57. h4 Bc3 58. Kh7 Kf8 59. f6 gxf6 60. g6 f5 61. h5 Bg7 62. h6 Bc3 63.
g7+ Kf7 64. g8=Q+ Ke7 65. Kg6 Bxb4 66. Qg7+ Ke6 67. h7 Be7 68. h8=Q Kd7 69.
Qd4+ Kc7 70. Qc3+ Kb6 71. Qb8+ Ka6 72. Qa1+ Ba3 73. Qxa3# {Black checkmated}
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