Author: Andreas Stabel
Date: 00:55:15 08/18/03
Go up one level in this thread
On August 15, 2003 at 15:56:50, Alastair Scott wrote: >On August 14, 2003 at 23:18:39, Omid David Tabibi wrote: > >>How about 128? :) Is there any position from an actual game in which there were >>more than 128 moves?! (I remember a game in which Alekhine had three queens and >>his opponent two queens, so the legal moves might have been above 128) > >It's a fake (Alekhine-Grigoriev): > >http://www.xs4all.nl/~timkr/chess/al5qtxt.htm > >Another Tim Krabbe investigation has shown that the maximum number of legal >moves for one side in a position occuring in actual play - at least a position >found so far - is 75. That intuitively seems rather low, but it would be >interesting to try to come up with an upper bound for a 'sensible' position >(with no gross material imbalance, for example; opposite pieces in the way would >limit the number of legal moves). > >http://www.xs4all.nl/~timkr/chess2/diary.htm (item 212). > >Alastair I've made a program that scans PGN files and gives a lot of statistics. This is one of them. I scanned what was called the Granit collection, and there the following game has 92 possible moves for black at move 53. [Event "?"] [Site "VOGChess"] [Date "????.??.??"] [Round "?"] [White "Jeane"] [Black "Glass-Man"] [Result "1/2-1/2"] [ECO "B00"] [Opening "King's pawn opening"] [Termination "normal"] [Mode "VOG"] [PlyCount "123"] 1. e4 d6 2. Bd3 Nc6 3. Nf3 Be6 4. O-O Nf6 5. c4 Bg4 6. Qe2 Bh5 7. b3 e5 8. a4 Be7 9. Nc3 Nb4 10. Bb1 c5 11. Nb5 Nd7 12. Qd3 Nxd3 13. Bxd3 Qa5 14. Bc2 O-O 15. d3 Nb6 16. Be3 a6 17. Nc7 Rac8 18. h3 Rxc7 19. Ng5 Be2 20. Rae1 f6 21. Ne6 Bxf1 22. Rxf1 Rfc8 23. h4 Qc3 24. Rc1 Rd7 25. Bd1 Qxd3 26. a5 Qxe4 27. h5 d5 28. cxd5 Nxd5 29. Rc4 Qd3 30. Bxc5 Qxd1+ 31. Kh2 Qxb3 32. Rg4 Qb5 33. Rxg7+ Kh8 34. Bxe7 Qxa5 35. Bxf6 Qb6 36. h6 Qxe6 37. Rf7+ Nxf6 38. Rxf6 Qxf6 39. f3 b5 40. Kh3 b4 41. Kg4 b3 42. Kh5 b2 43. Kg4 b1=Q 44. f4 e4 45. Kg3 e3 46. Kg4 e2 47. Kf3 e1=Q 48. Kg4 a5 49. Kf3 a4 50. Kg4 a3 51. Kf3 a2 52. Kg4 a1=Q 53. Kf3 Qh1 54. Kf2 Qb8 55. Ke2 Qba8 56. Ke3 Qf8 57. Ke2 Kg8 58. Kf2 Qff6 59. f5 Qh8 60. Ke3 Rc4 61. Kf2 Rd8 62. Ke3 1/2-1/2 Fen position: [D]2r4k/3r3p/5q1P/8/5P2/5K2/6P1/qq2q3 b - - 0 53 Best regards Andreas Stabel
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