Author: Uri Blass
Date: 15:49:07 06/13/05
Go up one level in this thread
On June 13, 2005 at 18:14:35, Christopher Conkie wrote: >No Dan. :-) > >There is no need to send me the source. Please don't think I was implying >anything except in general about the search depth. Normally a blocked position >would provide this info. The illegal position (3) has quite a few moves up for >consideration (albeit most leading to a dead draw). > >It stands to reason that 63 is logigical and I only observered that the ply >depth maybe erroneously started at 4 in the visual output of the GUI. > >>You are correct that Bruja will allow position 3. Are you sure it is illegal? >>Say I give up my 2 bishops, 2 rooks and queen judiciously so 5 of your pawns >>break through the chain. Those 5 march home as do 5 of mine on the vacated >>files. We still have 3 pawns each blocked. If you help out with your bishops, >>rooks and queen, can we not get the rest of them home? > >Ummm. I think that only 8 promoted pieces can be theoretically possible >(cumulative). I could be wrong, if I am it is 10 for sure (perhaps there is a >little help out there on this one, here, but I will check it as well). > >The position provided is illegal for sure because 8 pawns of each side have got >home (in theory). > >I'll try and contribute any info further up in your new thread if found as this >one is going down the page now. > >:-) > >Christopher You are clearly wrong 16 promoted pieces are possible. The position that you posted when both sides have 10 knights happened in a game that I played against myself. [Event "Edited game"] [Site "URI-AMD"] [Date "2005.06.14"] [Round "-"] [White "-"] [Black "-"] [Result "*"] 1. a4 b5 2. a5 b4 3. a6 Bb7 4. axb7 b3 5. Ra2 bxa2 6. bxa8=N a1=N 7. b4 a5 8. b5 a4 9. b6 a3 10. b7 a2 11. c4 e5 12. c5 Nc6 13. b8=N Nb3 14. h4 g5 15. Bb2 g4 16. d4 Qg5 17. hxg5 h5 18. g6 Bh6 19. g7 Nf6 20. g8=N h4 21. e3 Nd5 22. e4 a1=N 23. f4 Bg5 24. fxg5 Rh6 25. g6 Nce7 26. g7 Rb6 27. cxb6 c5 28. Bc1 c4 29. Bf4 exf4 30. Rh3 gxh3 31. Qg4 h2 32. Qe6 h1=N 33. Qc6 dxc6 34. Bd3 cxd3 35. g4 h3 36. g5 h2 37. Ne2 Ng3 38. g6 h1=N 39. e5 f3 40. b7 c5 41. Na6 c4 42. b8=N c3 43. e6 Nf4 44. d5 c2 45. d6 c1=N 46. Nh6 f2+ 47. Kd1 f1=N 48. g8=N f5 49. g7 d2 50. Nd4 Ngh5 51. Nc2 Nfg6 52. d7+ Kd8 53. Nab4 Na2 54. Ke2 d1=N 55. Ng4 f4 56. Nh2 Nde3 57. Nh6 N3d5 58. g8=N f3+ 59. Kd1 f2 60. Nf6 Nfg3 61. Nfg4 f1=N 62. Nb6 Kc7 63. d8=N Nc5 64. Ndc6 Ng8 65. e7 Nf5 66. Nd3 Ne6 67. N6d4 Ndf6 68. e8=N+ Kd8 69. Nd6 Ne8 70. Ne2 Nf1g3 71. Nge3 Ne4 72. Nf3 N1g3 73. Nf1 Nb3 74. Nbc4 Nbc5 75. Na5 Nb7 76. Nb3 Nb4 77. Nb5 Nc6 78. N5c3 N4c5 79. Na6 Nd7 80. Na2 Ne4 81. Nac5 N4d6 82. Ne4 Nf7 83. Nef2 N5d6 84. Nhg4 Nhf4 85. Nh3 Nd5 86. Ngf2 N5b6 87. Ng4 Ndc8 88. Nge3 Nd5 89. Ng2 Ndb4 90. Nge3 Na6 91. Ng2 Nef6 92. Nge3 Ke8 93. Ng2 Nh7 * Uri
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