Author: Arturo Ochoa
Date: 02:03:34 10/06/00
Hello: I'm building a specific Test Chess Suite based on the difficult strategic chess theme of the pawn positional sacrifice. I got an interesting position from one game of the the 1999 Sarajevo Tournament. The game occured on the Round 3 between Alexander Morozevich (2723) and Alexei Shirov (2726). Alexander Morozevich sacrified a pawn spectacularly in the move forty. I am really wondered how Morozevich found this move. [D]2b1r1k1/2pn1p2/1p3qp1/1P1Pb2p/2P4P/2B2BP1/2Q2PK1/3R4 w The spectacular move was 40. d6!! I have to mention that this move was done in the border line of the first time control. The complete epd string is: 2b1r1k1/2pn1p2/1p3qp1/1P1Pb2p/2P4P/2B2BP1/2Q2PK1/3R4 w - - bm d5d6;c0 Alexander Morozevich (2723) - Alexei Shirov (2726);c1 Sarajevo 19.05.1999;eco C42;id Pawn Positional Sacrificied Pos 1; Next, I show the complete game so you can enjoy this interesting game. [Event "Sarajevo"] [Site "?"] [Date "1999.05.19"] [Round "3"] [White "Morozevich, Alexander"] [Black "Shirov, Alexei"] [Result "1-0"] [ECO "C42"] [WhiteElo "2723"] [BlackElo "2726"] [PlyCount "113"] [EventDate "1999.05.17"] 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4 Nb4 9. Be2 O-O 10. Nc3 Bf5 11. a3 Nxc3 12. bxc3 Nc6 13. cxd5 Qxd5 14. c4 Qd6 15. Be3 Bf6 16. Ra2 Rad8 17. d5 Na5 18. Nd4 Bd7 19. a4 Rfe8 20. Nb5 Bxb5 21. axb5 b6 22. Bd2 Nb7 23. Rxa7 Nc5 24. Bf3 Be5 25. g3 Qf6 26. Kg2 Re7 27. h4 h6 28. Qc2 Rde8 29. Re1 Bd6 30. Rxe7 Qxe7 31. Qf5 g6 32. Qb1 h5 33. Bg5 Qe5 34. Ra3 Qd4 35. Qc2 Nd7 36. Rd3 Qa1 37. Rd1 Qe5 38. Bd2 Qf6 39. Bc3 Be5 40. d6 cxd6 41. Bd2 Qe6 42. Bd5 Qg4 43. Bg5 Kg7 44. Re1 Rc8 45. Qa2 Qf5 46. Re3 f6 47. Rf3 Qg4 48. Bf4 Re8 49. Qa7 Re7 50. Qc7 Kh7 51. Bxe5 dxe5 52. Qd6 Rg7 53. Bc6 Qd4 54. Rd3 Qxd6 55. Rxd6 Nc5 56. Rxf6 Ra7 57. Bd5 1-0 Alternative variations to the game main line would be: 1) If 40. ... Bxc3 41.dxc7 Nc5 42. Qxc3 Qxc3 43. Rd8 2) If 41...Ad4 42.Ab7 Ce5 42.Dxc3 I like this kind of positions for chess programs, because I can detect bugs of the positional chess program evaluations or the simple no positional consideration for this kind of positions. For example, the new Chess Tiger Beta 12.95b got the move in thirty three minutes. Fritz6.a never got the move after one hour. I haven't tested this position with other chess programs. Best Regards, Arturo.
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