Author: Jeremiah Penery
Date: 00:54:25 02/25/00
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On February 25, 2000 at 01:17:19, Howard Exner wrote: >No it's not the sequel to "Analyse This" but an odd position I discovered >while I was recently looking for a Kevin Spraggett article in my old chess >magazines. It is a 1913 study by J. Krejcik from Nathan Divinsky's column in "En >Passant" #110 from 1991. > >[D]8/1p1p4/3p2p1/5pP1/1p3P2/1P1p1P1k/1P1P1P1p/5K1B w - - Quite a position. :) >If you set your chess program to blitz, and autoplay this I'll wager that some >programs will stumble on to the winning sequence of moves. Running with the I was surprised to find that this is true! >king >to a2 and marching back to its initial position, forcing black to move a pawn - >repeat till black's pawn moves are exhausted, when the Black King must finally >move. It's of course not meant as a find the winning move test as it runs around >100 moves to its completion. Perhaps 2 minutes per side or less could reveal >some programs making this crazy to and fro march. I ran my modified Crafty and gave it only a few seconds per side, and at any point (except after the king penetration), it never considered any moves except the 'correct' ones. This appears to be a mate in 93: 1. Ke1 Kh4 2. Kd1 Kh5 3. Kc1 Kh4 4. Kb1 Kh5 5. Ka1 Kh4 6. Ka2 Kh3 7. Kb1 Kh4 8. Kc1 Kh3 9. Kd1 Kh4 10. Ke1 Kh3 11. Kf1 d5 12. Ke1 Kh4 13. Kd1 Kh3 14. Kc1 Kh4 15. Kb1 Kh5 16. Ka1 Kh4 17. Ka2 Kh5 18. Kb1 Kh4 19. Kc1 Kh3 20. Kd1 Kh4 21. Ke1 Kh3 22. Kf1 d4 23. Ke1 Kh4 24. Kd1 Kh3 25. Kc1 Kh4 26. Kb1 Kh5 27. Ka1 Kh4 28. Ka2 Kh5 29. Kb1 Kh4 30. Kc1 Kh5 31. Kd1 Kh4 32. Ke1 Kh3 33. Kf1 b6 34. Ke1 Kh4 35. Kd1 Kh5 36. Kc1 Kh4 37. Kb1 Kh3 38. Ka1 Kh4 39. Ka2 Kh5 40. Kb1 Kh4 41. Kc1 Kh3 42. Kd1 Kh4 43. Ke1 Kh3 44. Kf1 d6 45. Ke1 Kh4 46. Kd1 Kh5 47. Kc1 Kh4 48. Kb1 Kh3 49. Ka2 Kh4 50. Ka1 Kh5 51. Kb1 Kh4 52. Kc1 Kh5 53. Kd1 Kh4 54. Ke1 Kh3 55. Kf1 b5 56. Ke1 Kh4 57. Kd1 Kh5 58. Kc1 Kh4 59. Kb1 Kh5 60. Ka2 Kh4 61. Ka1 Kh5 62. Kb1 Kh4 63. Kc1 Kh5 64. Kd1 Kh4 65. Ke1 Kh3 66. Kf1 d5 67. Ke1 Kh4 68. Kd1 Kh5 69. Kc1 Kh4 70. Kb1 Kh3 71. Ka2 Kh4 72. Ka1 Kh3 73. Kb1 Kh4 74. Kc1 Kh5 75. Kd1 Kh4 76. Ke1 Kh5 77. Kf1 Kh4 78. Kg2 Kh5 79. Kxh2 Kh4 80. Bg2 Kh5 81. Bh3 Kh4 82. Bxf5 gxf5 83. g6 Kh5 84. g7 Kg6 85. g8=Q+ Kf6 86. Qe8 Kg7 87. Kh3 Kh7 88. Kh4 Kh6 89. Qh5+ Kg7 90. Kg5 Kf8 91. Kf6 Kg8 92. Qf7+ Kh8 93. Qg7#
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