Author: Hans Havermann
Date: 21:33:39 12/07/98
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On December 07, 1998 at 22:01:35, John Wentworth wrote: >What is the largest # of moves in a single game between two chess engines that >people have witnessed. [Event "MacChess/HIARCS"] [Site "Weston, ON, CA"] [Date "1997.12.21"] [Round "7"] [White "MacChess 4.0"] [Black "HIARCS6 for Mac"] [Result "1/2-1/2"] 1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. O-O Bg4 5. c4 e6 6. Ne5 Bh5 7. d4 Nbd7 8. Nc3 Be7 9. Qb3 Qb6 10. Nxd7 Nxd7 11. e4 dxc4 12. Qxc4 O-O 13. b3 e5 14. Be3 Qb4 15. Qxb4 Bxb4 16. Rfc1 exd4 17. Bxd4 Ba3 18. Rc2 Rfd8 19. Ne2 Nf8 20. Be3 Ne6 21. Nf4 Nxf4 22. Bxf4 f6 23. Rb1 Bd1 24. Rd2 Rxd2 25. Bxd2 Bc2 26. Re1 Re8 27. Bc3 Bc5 28. h3 Bd3 29. a4 Bc2 30. b4 Bd6 31. a5 Kf7 32. Re2 Ba4 33. Rd2 Ke6 34. Rb2 Bb5 35. Rc2 h5 36. Be1 Bd3 37. Rc1 h4 38. gxh4 Rh8 39. f3 Rh5 40. Kh1 g6 41. Rd1 Be2 42. Rb1 Rb5 43. Rb2 Bc4 44. Rb1 Be2 45. Bd2 Bd3 46. Rb3 Bc4 47. Rb1 Bd3 48. Rd1 a6 49. Bc3 Bc4 50. Rd4 Bb3 51. Be1 Be5 52. Rd3 Bc4 53. Rd1 Bd6 54. Rb1 Bf4 55. Rb2 Bd3 56. Bc3 Bc1 57. Ra2 Rh5 58. Be1 Bf4 59. Rb2 Be5 60. Rb3 Bc4 61. Rb1 Bf4 62. Bf2 Bd6 63. Rc1 Be2 64. Rc2 Bd3 65. Rc3 Bb5 66. Rb3 Ke7 67. Rb1 Bc4 68. Be1 Bf4 69. Rd1 Be2 70. Rb1 Rb5 71. Rb2 Bd3 72. Rb3 Bc4 73. Rb2 Bd6 74. Rb1 Ke6 75. Kg1 Bc5+ 76. Kh1 Be3 77. Rd1 Bf4 78. Rb1 c5 79. h5 gxh5 80. h4 Ke7 81. Rb2 Bd6 82. Rc2 Bd3 83. Rd2 c4 84. Rb2 f5 85. exf5 Rxf5 86. Kg1 Be5 87. Rd2 Bd4+ 88. Kh2 Rb5 89. Bf1 Be5+ 90. Kg2 Rd5 91. Bxd3 cxd3 92. Rd1 Ke6 93. Bd2 Rd4 94. Kh3 Kf5 95. Be3 Rd8 96. Bd2 Bf4 97. Kg2 Bxd2 98. Rxd2 Rd4 99. Kg3 Ke5 100. Rd1 d2 101. Kg2 Rxh4 102. Rxd2 Rxb4 103. Rd7 Rb5 104. Kg3 Ke6 105. Rg7 Kf6 106. Rd7 Rxa5 107. Rxb7 Rb5 108. Ra7 a5 109. Ra8 Kf5 110. Rh8 Kg6 111. Rg8+ Kf7 112. Ra8 Kf6 113. Kh4 Rc5 114. Kg3 Kf5 115. Rh8 Kg6 116. Rg8+ Kf7 117. Ra8 Kf6 118. Kh4 Rd5 119. Kg3 Kf5 120. Rh8 Kg6 121. Rg8+ Kh6 122. Ra8 Rc5 123. Rh8+ Kg7 124. Ra8 Rb5 125. Ra6 Rf5 126. f4 Rc5 127. Kf3 Rb5 128. Kg3 Kf7 129. Kf3 Rc5 130. Ke4 Kg8 131. Ra8+ Kg7 132. Ra7+ Kf6 133. Ra6+ Ke7 134. Ra7+ Kd6 135. f5 h4 136. f6 Ke6 137. f7 Rc8 138. Kf4 Rh8 139. Kg4 h3 140. f8=N+ Kd6 141. Nh7 Kc6 142. Ra6+ Kb5 143. Rh6 a4 144. Rh5+ Kb4 145. Rxh3 a3 146. Rh2 Rc8 147. Nf6 Kb3 148. Rh3+ Rc3 149. Rh1 Kb2 150. Nd5 Rc1 151. Rh2+ Rc2 152. Rh6 Rc5 153. Rb6+ Ka1 154. Ne3 Rc3 155. Nf5 Ka2 156. Nd4 Rc4 157. Rd6 Kb2 158. Kf3 Rb4 159. Ne2 Rb3+ 160. Ke4 a2 161. Rd2+ Kb1 162. Rd1+ Kc2 163. Nd4+ Kxd1 164. Nxb3 Kc2 165. Na1+ Kb2 166. Kd3 Kb1 167. Kc3 Kc1 168. Nb3+ Kb1 169. Na1 Kc1 170. Nb3+ Kb1 171. Na1 1/2-1/2 Noteworthy, I thought, because of the underpromotion in 140.
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