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Subject: Chess Tigers problem (Bug / Blunder)

Author: James T. Walker

Date: 15:48:42 12/19/04


Here is a game played by CT 15.  At first I could not understand the move 97.
Bxa3.  It appears the only reason for this move is to avoid the 50 move rule
since any other move results in a draw.  Also note that Chess Tiger 2004 plays
the same move.

[Event "G/5min"]
[Site "?"]
[Date "2004.12.19"]
[Round "2"]
[White "Chess Tiger 15"]
[Black "Hiarcs 9"]
[Result "0-1"]
[ECO "E19"]
[PlyCount "231"]
[EventDate "2004.??.??"]

1. c4 Nf6 2. Nf3 b6 3. g3 e6 4. Bg2 Bb7 5. d4 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2
Nxc3 9. Qxc3 c5 10. Rd1 d6 11. b3 Bf6 12. Bb2 Qe7 13. Qc2 Nc6 14. e4 e5 15. d5
Nd4 16. Qd3 Rae8 17. Rd2 Qc7 18. Re1 Bc8 19. Nxd4 exd4 20. f3 Bd7 21. Bc1 a6
22. Qc2 b5 23. Bf1 h5 24. Rf2 b4 25. Bf4 Be5 26. Bg5 f5 27. f4 d3 28. Bxd3 Bd4
29. Kg2 Bxf2 30. Kxf2 fxe4 31. Bxe4 Kh8 32. Qb1 Bg4 33. Bg6 Rxe1 34. Qxe1 Qd7
35. Qe7 Rb8 36. Qxd7 Bxd7 37. Bxh5 Rb7 38. g4 Kg8 39. h4 Kf8 40. f5 a5 41. Bg6
Be8 42. Bf4 Rd7 43. g5 Bxg6 44. fxg6 a4 45. h5 a3 46. h6 Ke7 47. h7 Rd8 48. Ke3
Rf8 49. Kd3 Ra8 50. Ke4 Re8 51. Be3 Rf8 52. Kd3 Rh8 53. Ke2 Rf8 54. Bf2 Rh8 55.
Ke3 Kd7 56. Bg3 Rd8 57. Kf4 Rf8+ 58. Kg4 Ke7 59. Bh2 Rh8 60. Kf3 Rf8+ 61. Ke3
Rh8 62. Bg3 Kd7 63. Kf3 Rf8+ 64. Bf4 Re8 65. Kf2 Rf8 66. Ke2 Ke7 67. Bg3 Rh8
68. Kd3 Re8 69. Ke3 Kd7+ 70. Kd2 Rf8 71. Kd3 Rh8 72. Bh2 Ke7 73. Ke4 Kd7 74.
Kf3 Ke7 75. Bf4 Rf8 76. Ke2 Rh8 77. Kf1 Rf8 78. Kg2 Rh8 79. Kg3 Kd7 80. Kg4 Ke7
81. Bh2 Ra8 82. Kf5 Rf8+ 83. Ke4 Kd7 84. Bf4 Re8+ 85. Kd3 Ke7 86. Kd2 Rh8 87.
Bg3 Rf8 88. Be1 Rh8 89. Ke3 Kd7 90. Kf4 Kd8 91. Kf5 Kd7 92. Bf2 Rf8+ 93. Kg4
Ke7 94. Be3 Rh8 95. Kg3 Rf8 96. Bc1 Rb8 97. Bxa3 bxa3 98. Kf4 Kd7 99. Kf3 Re8
100. Kf2 Kc7 101. Kf3 Kb6 102. Kf4 Ka5 103. Kg4 Kb4 104. Kf4 Kc3 105. Kf5 Kb2
106. h8=Q Rxh8 107. Ke6 Kxa2 108. Kf7 Kxb3 109. Kxg7 Ra8 110. Kh7 a2 111. g7
a1=Q 112. g8=Q Rxg8 113. Kxg8 Qe5 114. g6 Kxc4 115. Kf8 Qf6+ 116. Kg8 0-1

Position before 97. Bxa3
[D]1r6/4k1pP/3p2P1/2pP2P1/1pP5/pP4K1/P7/2B5 w - - 99 1



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