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Subject: Position from Ramat-Gan

Author: Rémi Coulom

Date: 13:17:59 07/16/04


Hi,

This position is taken from the ParSOS - The Crazy Bishop game:
[D]8/p6p/1p2kBp1/2p5/2P5/P4P2/P3nK1P/8 b - -

During the game, GM Boris Alterman commented that Kxf6 Kxe2 leads to a won pawn
endgame for black. My program does not manage to evaluate this pawn endgame as a
win, even after a very long search. Can you explain if/how it is a win ?

TCB Played Nc1 during the game (at move 43). This is the whole game:

[Event "WCCC2004"]
[Site "Bar-Ilan"]
[Date "2004.07.11"]
[Round "9"]
[White "ParSOS"]
[Black "The Crazy Bishop"]
[Result "1/2-1/2"]

1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Bb5 dxe4 5. Nxe5 Qd5 6. Qa4 Ne7 7. Nxc6 Nxc6 8.
O-O Bd7 9. Re1 O-O-O 10. Bf1 f5 11. Na3 Kb8 12. Qc4 Be6 13. Qxd5 Bxd5 14. d4
exd3 15. Bg5 Bxa3 16. bxa3 Rd7 17. Bxd3 Bxg2 18. Re3 Be4 19. Bxe4 fxe4 20. Rxe4
Rf8 21. Rae1 b6 22. Kf1 Rf5 23. Bc1 Kb7 24. Ke2 Ne7 25. Kf1 Nd5 26. c4 Nf6 27.
Re7 Kc8 28. R1e2 Kd8 29. Rxd7+ Kxd7 30. Bb2 Rf4 31. Rd2+ Ke6 32. Re2+ Kf7 33.
Rc2 Rf5 34. Bc1 g6 35. Kg2 Ne4 36. Kf1 c5 37. Kg2 Nd6 38. f3 Ke6 39. Kg3 Rf6
40. Bb2 Nf5+ 41. Kf2 Nd4 42. Re2+ Nxe2 43. Bxf6 Nc1 44. Bg7 Nxa2 45. Ke3 Nc1
46. Kf4 Nd3+ 47. Ke4 Nf2+ 48. Kf4 h5 49. Kg5 Kf7 50. Be5 Nh3+ 51. Kh4 Ng1 52.
Kg3 Ne2+ 53. Kf2 Nd4 54. Ke3 Nc6 55. Bc3 Ke6 56. Ke4 Nd8 57. f4 h4 58. h3 Nf7
59. Be1 Nd6+ 60. Kd3 Kf5 61. Bxh4 Kxf4 62. Bd8 Nf7 63. Bc7+ Ne5+ 64. Kc3 Ke4
65. Bd8 Nc6 66. Bg5 Nd4 67. h4 Ke5 68. Kd3 Kf5 69. a4 Nc6 70. Kd2 Ke4 71. Bf6
Nd4 72. Kc3 Ke3 73. Be5 Ke4 74. Bf6 Nc6 75. Kd2 Kf5 76. Bg5 Ne5 77. Kc3 Kg4 78.
Be7 Nc6 79. Bf6 Kf5 80. Bg5 Ke4 81. Bf6 Nd4 82. Kd2 Kf5 83. Bd8 Ke4 84. Bf6 Kf5
85. Bd8 Kf4 86. Bf6 Nc6 87. Kc3 Ke3 88. Bg7 Ke4 89. Bf6 Ke3 90. Bg7 Kf2 91. Kb2
Kf3 92. Kc3 Kg3 93. Bf6 Kf4 94. Kd3 Kf5 95. Bg5 Ne5+ 96. Kc3 Kg4 97. Be7 Nc6
98. Bf6 Kf5 99. Bg5 Na5 100. Bd8 Ke4 101. Bf6 Kf3 102. Kd3 Nc6 103. Kd2 Na5
104. Kd3 Kg4 105. Be7 Kf4 106. Bd8 Ke5 107. Bc7+ Kf5 108. Bd8 Nc6 109. Bg5 Nd4
110. Ke3 Nb3 111. Bd8 Ke6 112. Bc7 Na5 113. Kd3 Kf5 114. Bd8 Kf4 115. Bf6 Kg4
116. Be7 Kg3 117. Bf6 Kf4 118. Bd8 g5 119. Bxg5+ Kg4 120. Bf6 Kf5 121. Bg7 Nc6
122. Bc3 Kg4 123. Bf6 Kf5 124. Ba1 Ne7 125. Kd2 Ng6 126. h5 Ne7 127. Bg7 Kg5
128. Bf8 Nf5 129. a5 Nd4 130. h6 Kg6 131. a6 Nc6 132. Kd3 Nb4+ 133. Ke4 Nxa6
134. Kd5 Nb4+ 135. Kd6 Nc2 136. Kc7 Nd4 137. Bg7 Ne6+ 138. Kb7 Nxg7 139. hxg7
Kxg7 140. Kxa7 1/2-1/2

In fact, Boris Alterman commented almost all the way to move 70 that it should
be a win for black. There was probably a way to win this game, but I do not what
it was. comments would be appreciated.

Rémi



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