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Subject: Speculative(?) queen sac

Author: Tord Romstad

Date: 02:57:30 12/14/03


I've just completed a 100-game blitz match between Gothmog 0.4.2g and AnMon
5.21, which
was won by AnMon with a score of 59.5-40.5.  Both engines won several really
cool games; I'm
beginning to become a fan of AnMon.

In one of the games won by Gothmog, the following position arose:

[D]2r1k2r/pp1bppbp/3p1np1/q7/4PPn1/1NN5/PPPQ2PP/1K1R1BBR b - -

In this position, Gothmog played the spectacular queen sacrifice 13... Qxc3!?
and won
after 66 moves.

Is this move really sound?  Do any other engines like the sac?

The game:

[Event "Test4"]
[Date "2003.12.14"]
[Round "58"]
[White "AnMon 5.21"]
[Black "Gothmog 0.4.2g"]
[Result "0-1"]
[TimeControl "240+2"]
[PlyCount "131"]

1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 d6 7. Qd2
Nf6 8. f3 Bd7 9. O-O-O Rc8 10. Kb1 Ne5 11. f4 Neg4 12. Bg1 Qa5 13. Nb3
Qxc3 14. bxc3 Nxe4 15. Qd3 Nxc3+ 16. Kc1 Bf5 17. Qf3 Nxa2+ 18. Kd2
Bc3+ 19. Ke2 O-O 20. h3 Nf6 21. Nd4 Be4 22. Qg3 Bb4 23. Ra1 Nc3+
24. Kf2 Bxc2 25. Qh4 Nce4+ 26. Kf3 Rc3+ 27. Be3 Bb3 28. Re1 Bc5
29. Nxb3 Rxb3 30. Bc4 Rc3 31. Qh6 Nd2+ 32. Ke2 Bxe3 33. Rec1 Ra3
34. Rhe1 Nde4 35. Rca1 Ng3+ 36. Kf3 Rxa1 37. Rxa1 Nf5 38. Qg5 d5
39. Bd3 Bd4 40. Bxf5 Bxa1 41. Bd3 Bd4 42. Qh4 e6 43. Qe1 Kg7 44. Qb4
Bb6 45. Qe7 Rc8 46. Qxb7 Rc3 47. Ke2 Nh5 48. Kd2 Rc7 49. Qb8 Nxf4
50. Bf1 e5 51. g3 Ne6 52. Qa8 Nc5 53. Kd1 Re7 54. g4 e4 55. g5 d4
56. Bc4 e3 57. Qf3 Ne4 58. Qf4 Bc7 59. Qh4 Bg3 60. Qh6+ Kg8 61. Ke2
Bf2 62. Kf3 Nd2+ 63. Ke2 Nxc4 64. h4 d3+ 65. Kxd3 Ne5+ 66. Kc2
{White resigns} 0-1

Tord




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