Author: Uri Blass
Date: 02:09:44 03/02/05
Go up one level in this thread
On March 01, 2005 at 20:42:28, Andre Lopez wrote: >On March 01, 2005 at 14:22:49, Uri Blass wrote: > >>On March 01, 2005 at 13:53:34, Dann Corbit wrote: >> >>>The opposite of a good test move (one best move choice) is one with lots of >>>equally good winning moves. I was playing around, analyzing some Orangutan >>>games and stumbled on this position: >>>[D]1Q6/8/2K5/3NQ1p1/8/8/5k2/8 w - - acn 2564; acs 0; bm Nc3 Ne3 Qb1 Qb3 Qb4 Qb5 >>>Qbb2+ Qbh8 Qc3 Qc8 Qe3+ Qe4 Qe6 Qe7 Qee8 Qf5+ Qf8+ Qg3+ Qh2+; ce 32762; dm 3; pv >>>Qf5+ Kg2 Ne3+ Kg1 Qf1#; >>> >>>Which made me wonder, >>>In a real game, what is the most ever equally good (DTM) simultaneous best >>>moves? >>> >>>19 equal mates in 3 is interesting, but I wonder if there has ever been (for >>>example) 100 best moves leading to mate in some minimum distance. >> >>I think that it will be hard to find more than 100 legal move in games(you can >>construct position with more than 200 moves but if you talk about positions from >>real games then my experience is that even more than 80 is very rare). >> >>constructing a position with more than 19 mates in 1 is easy >> >> >> >>[D]k7/2PPPPPP/7K/2Q5/2Q5/2Q5/6R1/1R5B w - - 0 1 >> >>Here is first position that I composed and I am sure it is easy to compose a >>better example. >> >>Uri > >Well any composition needs to be legal... This one is not... What was the last >black move? Dann Corbit is right that it is legal but to prove it the last move of black is not enough and you need the full game. Here is a proof that it is legal [Event "40'/40"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "white"] [Black "black"] [Result "*"] [PlyCount "170"] [TimeControl "40/2400:0"] 1. a4 b5 2. axb5 a6 3. bxa6 Bb7 4. axb7 e5 5.bxa8=Q Ba3 6. bxa3 Ne7 7. a4 Nec6 8. Qxc6 O-O 9. Qxd7 Nc6 10. a5 Re8 11. a6 Kh8 12. a7 Qb8 13. axb8=Q Nd8 14. Qxf7 h5 15. Qxh5+ Kg8 16. Qxe8+ Kh7 17. Qexd8 Kh6 18. c4 Kh7 19. Qdxc7 Kh6 20. Qxe5 Kh7 21. c5 Kh6 22. c6 Kh7 23. c7 Kh6 24. d4+ g5 25. d5 Kh7 26. d6 Kh6 27. d7 Kh7 28. e4 Kh6 29. Qxg5+ Kh7 30. Qa5 Kg6 31. e5 Kh7 32. e6 Kg6 33. e7 Kh7 34. h4 Kg6 35. Rh3 Kh7 36. g4 Kg6 37. Qda4 Kh7 38. g5 Kg6 39. Nc3 Kh5 40. Nd5 Kg6 41. Nf3 Kf5 42. Ne5 Kxe5 43. Qa2 Kd6 44. Q5a3+ Kc6 45. Qd8 Kb7 46. Qd3 Kc6 47. Qad2 Kb7 48. Bg2 Kc6 49. Bh1 Kb7 50. Rb1+ Ka7 51. Qe4 Ka6 52. Nb6 Ka7 53. Ra1+ Kxb6 54. Rb1+ Ka7 55. Ba3 Ka6 56. Bb4 Ka7 57. Bc5+ Ka6 58. Ba7 Kxa7 59. Qf8 Ka6 60. Qf7 Ka7 61. Qec2 Ka6 62. h5 Ka7 63. g6 Ka6 64. h6 Ka7 65. g7 Ka6 66. h7 Ka7 67. Qfd5 Ka6 68. f4 Ka7 69. Rh2 Ka6 70. Rg2 Ka7 71. f5 Ka6 72. f6 Ka7 73. f7 Ka6 74. Qcc3 Ka7 75. Qdc2 Ka6 76. Qce4 Ka7 77. Kf2 Ka6 78. Kf3 Ka7 79. Kf4 Ka6 80. Kg5 Ka7 81. Kh5 Ka6 82. Kh6 Ka7 83. Qed4+ Ka6 84. Q4c4+ Ka7 85. Qdc5+ Ka8 * Uri
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