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Subject: Avoid move Nxf3 test position

Author: Howard Exner

Date: 18:03:54 12/27/00


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 - -





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