Author: Vincent Diepeveen
Date: 05:44:25 12/28/00
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On December 27, 2000 at 22:28:57, Robert Hyatt wrote: >On December 27, 2000 at 21:03:54, Howard Exner wrote: > >>An engine vs engine game with an interesting endgame. >> >>[Event "Century3 engine vs engine on one computer"] >>[Site "game 1, 15 minutes per game, Atlon900 Mhz."] >>[Date "2000.12.27"] >>[Round "?"] >>[White "Rebel Century 3"] >>[Black "ck24041.eng"] >>[Result "*"] >>[WhiteElo "2740"] >>[BlackElo "2740"] >>[ECO "C88"] >> >>1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 >>8. c3 O-O 9. h3 Bb7 10. d4 Na5 11. Bc2 c5 12. a4 Qc7 13. axb5 axb5 14. >>Na3 exd4 15. Nxb5 Qd7 16. Na3 dxc3 17. bxc3 Nc4 18. Qe2 Nxa3 19. Bxa3 Rfe8 >>20. Nd2 Bd8 21. Qd3 Ba6 22. Qe3 Bb7 23. Bb2 Rxa1 24. Rxa1 Qe7 25. Ba4 Rf8 >>26. Re1 Ba5 27. Nc4 Bc7 28. f3 Ba6 29. Nxd6 Bxd6 30. e5 Rb8 31. exd6 Qxe3+ >>32. Rxe3 Rxb2 33. Re7 Rb8 34. Rc7 Rd8 35. Rc6 Bb7 36. Rc7 Bd5 37. Rxc5 >>Kf8 38. c4 Be6 39. Rc6 Bd7 40. Ra6 Bxa4 41. Rxa4 Rxd6 42. Kf2 Rd2+ 43. >>Kg1 Rc2 44. Rb4 Ne8 45. Ra4 Nd6 46. c5 Rxc5 47. Ra2 Ke7 48. g4 g5 49. Kf2 >>Ke6 50. Kg3 Rc3 51. Ra6 Rb3 52. Kf2 Kd5 53. Ra7 Rb7 54. Ra5+ Rb5 55. Ra8 >>Rb2+ 56. Kg3 Rb3 57. Ra5+ Kd4 58. Kf2 Rb5 59. Ra7 Rb7 60. Ra5 h6 61. Ra6 >>Kd5 62. Kg3 Rb3 63. Kf2 Kc5 64. Ra7 Kd4 65. Ra6 Ke5 66. Ra5+ Rb5 67. Ra2 >>f5 68. Re2+ Kf6 69. gxf5 Nxf5 70. Ra2 h5 71. Rd2 Rb3 72. Rd8 Nh4 73. Ke2 >>Ng6 74. Rd6+ Kf7 75. Kf2 Nf4 76. h4 Rb2+ 77. Kf1 gxh4 78. Rd4 Ng6 79. Re4 >>h3 80. Kg1 Kf6 81. Kh1 Ne5 82. Rf4+ Kg6 83. Rf8 Rf2 84. Kg1 h2+ 85. Kh1 >>h4 86. Ra8 Nxf3 87. Ra6+ Kg5 88. Ra5+ Kg4 89. Rg5+ Kf4 90. Rf5+ Ke3 * >> >>This position is after 86. Ra8. Black should avoid Nxf3 because of perpetual >>check or stalemate. Rxf3 should win. Any programs avoid the move Nxf3? >> >>[D]R7/8/6k1/4n3/7p/5P2/5r1p/7K b - - > > >Strange. I tried this and I _never_ get Nxf3 at all. I get h3 at early >plies, then Kf6, until it changes to Kf5 for good... Interesting problem >of course. And I have seen this happen to both crafty and its opponents >from time to time... Oh well DIEP first 13 plies is a victim of its greedyness and captures with Nxf3, but then at 11 ply it gets a fail high to several moves to start with Kf6 then h3 but it remains keeping Nxf3 for a while. After a few minutes it gives Kf5 mate in 30 however and that was the end of the nxf3 suffering :) Can be however that the mate depth is not accurate. Have some bugs there recently perhaps.
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