Author: John Merlino
Date: 10:06:44 05/24/04
Go up one level in this thread
On May 24, 2004 at 02:42:00, Derek Paquette wrote: >1. g3 e5 2. Nc3 d5 3. d4 e4 4. Nh3 c6 5. >f3 f5 6. fxe4 fxe4 7. Bg5 Be7 8. Qd2 Nf6 9. O-O-O O-O 10. Bg2 a5 11. Rhf1 b5 >12. e3 a4 13. Kb1 b4 14. Ne2 Bg4 15. Nf2 Bh5 16. Bh3 Nbd7 17. Bf5 Nb6 18. g4 >Bf7 19. Nf4 Nc4 20. Qe2 Qd6 21. Bh4 Rfb8 22. Bg3 b3 23. cxb3 axb3 24. a3 Nxa3+ >25. bxa3 b2 26. Rd3 exd3 27. Qxd3 Rxa3 28. Ng6 hxg6 29. Bxd6 Bxd6 30. Qxa3 Bxa3 >31. Bc2 Bd6 32. h3 Bg3 33. g5 Nh7 34. Nd1 Be6 35. Bxg6 Nxg5 36. Nxb2 Nxh3 37. >Kc2 Rf8 38. Bh7+ Kxh7 39. Rxf8 Ng5 40. Nd3 Ne4 41. Ra8 Bf5 42. Nb4 c5 43. Nxd5 >Nf6+ 44. Kd2 Nxd5 45. dxc5 Bf2 46. Re8 Bxe3+ 47. Rxe3 Nxe3 48. Kxe3 Kh6 49. c6 >g5 50. Kd4 g4 51. Ke3 Kg5 52. c7 Kh4 53. Kf4 Bc8 54. Ke3 Kg3 55. Ke4 Kf2 56. >Ke5 g3 57. Kd6 g2 58. Kc6 g1=Q 59. Kd5 Qg7 60. Kc6 Qd7+ 61. Kc5 Qxc7+ 62. Kb4 >Qb6+ 63. Kc4 Be6+ 64. Kd3 Qc5 65. Kd2 Qc4 66. Kd1 Bg4+ 67. Kd2 Qd4+ 68. Kc1 >Qe3+ 69. Kc2 Bf5+ 70. Kb2 Qd3 71. Ka2 Qb5 72. Ka3 Bc2 73. Ka2 Qb4 74. Ka1 Qa3# >* The game is already over several moves before then, but in Blitz time control Crafty just doesn't have the time to see it. From what I can tell, Black already has all he needs in place after 20...Qd6. What Black didn't know is that 24...Rxa3! wins much faster than Nxa3+. Good test position for the materially minded programs: [D]rr4k1/4bbpp/2pq1n2/3p1B2/2nPpNP1/Pp2P1B1/1P2QN1P/1K1R1R2 b - - 0 24 CM_SKR on an AMD 2500 needs 19 seconds to see that Rxa3 is better than Nxa3+: Time Depth Score Positions Moves 0:00 1/3 -1.64 1997 24...Nxa3+ 25.bxa3 Qxa3 26.Qb2 0:00 1/4 -0.50 11217 24...Nxa3+ 25.bxa3 Qxa3 26.Qb2 Qa4 27.Be6 Qc4 0:00 1/4 -0.79 13658 24...Rb7 25.Ng6 Nxa3+ 26.bxa3 Qxa3 27.Nxe7+ Rxe7 0:00 1/5 -0.64 34933 24...Rb7 25.Ng6 Nxa3+ 26.bxa3 Qxa3 27.Nxe7+ Rxe7 28.Qb2 0:00 1/5 -1.05 77869 24...Bd8 25.Ne6 Nxa3+ 26.bxa3 Qxa3 27.Qb2 0:00 1/6 0.46 105323 24...Bd8 25.Ne6 Qe7 26.Bxb8 Bxe6 27.Bf4 Bxf5 28.gxf5 0:00 1/6 -0.35 119281 24...Rb7 25.Ng6 Qd8 26.Nxe7+ Rxe7 27.g5 Bh5 0:01 1/6 -2.59 341331 24...Nxa3+ 25.bxa3 b2 26.Bxh7+ Nxh7 27.Ng6 Qxg6 28.Bxb8 Rxb8 0:03 1/7 -3.90 670788 24...Nxa3+ 25.bxa3 b2 26.Kc2 Qxa3 27.N2d3 Qb3+ 28.Kd2 b1=N+ 29.Rxb1 Qa2+ 30.Nb2 Rxb2+ 31.Rxb2 Qxb2+ 32.Ke1 0:07 1/8 -5.25 1590463 24...Nxa3+ 25.bxa3 b2 26.Rd3 Rxa3 27.Ng6 Ra1+ 28.Kc2 Qb4 29.Nxe7+ Kh8 30.Ng6+ Bxg6 31.Rdd1 b1=Q+ 32.Rxb1 Rxb1 0:19 1/8 -8.83 4560128 24...Rxa3 25.Qxc4 dxc4 26.Ne2 Rba8 27.Kc1 Ra1+ 28.Kd2 Qb4+ 29.Nc3 R8a2 30.Rb1 Rxb2+ 31.Rxb2 Rxf1 32.Nxe4 Nxe4+ 33.Bxe4 0:40 1/9 -10.36 10014321 24...Rxa3 25.Qxc4 dxc4 26.N4d3 Rba8 27.Kc1 c3 28.bxc3 Ra1+ 29.Kd2 R8a2+ 30.Ke1 exd3 31.Bxd3 Rxd1+ 32.Kxd1 1:10 1/10 -10.85 16703723 24...Rxa3 25.Qxc4 dxc4 26.N4d3 Rba8 27.Kc1 Qd5 28.bxa3 Bxa3+ 29.Kd2 exd3 30.e4 Qxd4 31.Rb1 Bc5 2:22 1/11 -11.37 34188509 24...Rxa3 25.Qxc4 dxc4 26.N4d3 Rba8 27.Kc1 Qd5 28.bxa3 Bxa3+ 29.Kd2 exd3 30.Nxd3 cxd3 31.Rb1 Bb4+ 32.Kd1 Qc4 jm
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