Author: Dann Corbit
Date: 13:26:45 08/01/02
Go up one level in this thread
On August 01, 2002 at 16:20:54, John Merlino wrote: >On August 01, 2002 at 16:18:08, Dann Corbit wrote: > >>On August 01, 2002 at 00:55:58, Russell Reagan wrote: >> >>>Ok I confirmed that 182 can be obtained legally. I doubt this is the least moves >>>it can be accomplished in, but it works. >>> >>>[D]Q1Q3QQ/3Q1Q1Q/2q5/r4Q1K/k1r2R1R/8/q1q1Q3/qqqq1q1q w - - 0 79 >>> >>>[Event "Edited game"] >>>[Site "RUSSELL-PC1"] >>>[Date "2002.07.31"] >>>[Round "-"] >>>[White "-"] >>>[Black "-"] >>>[Result "*"] >>> >>>1. a4 h5 2. b4 g5 3. d3 e6 4. Bf4 Bc5 5. Bg3 Bb6 6. Bh4 Ba5 7. bxa5 gxh4 8. >>>Nc3 Nf6 9. Nd5 Ne4 10. Nb6 Ng3 11. hxg3 axb6 12. Nf3 Nc6 13. Nd4 Ne5 14. >>>Nf5 Nc4 15. dxc4 exf5 16. e3 d6 17. Bd3 Be6 18. Be4 c6 19. Bd5 cxd5 20. f3 >>>d4 21. a6 Bd5 22. a7 Be4 23. fxe4 h3 24. a5 h4 25. a6 h2 26. Kf2 Kd7 27. >>>Kf3 Kc6 28. Kf4 Kc5 29. e5 Qd7 30. Kg5 Rhd8 31. Kh5 Kb4 32. Qg4 h3 33. Rac1 >>>Ka4 34. Qg6 Rdc8 35. Rhf1 Rc5 36. Rf4 Ra5 37. Rh4 Rc8 38. Rf1 Rcc5 39. Rff4 >>>Rcb5 40. Rfg4 h1=Q 41. a8=Q h2 42. a7 Qa1 43. Qh8 h1=Q 44. a8=Q f4 45. e4 >>>d5 46. c5 f3 47. c4 d3 48. e6 d4 49. e5 d2 50. c6 d3 51. c5+ Rb4 52. c7 Qb5 >>>53. c8=Q d1=Q 54. c6 d2 55. c7 f2 56. e7 f5 57. e6 f4+ 58. Qg5 Qc2 59. e8=Q >>>f3 60. e7 Qbc6 61. Rf4 Rc4 62. Qgf5 f1=Q 63. Qf7 f2 64. e8=Q Qfb1 65. Qcd7 >>>f1=Q 66. c8=Q d1=Q+ 67. g4 b5 68. Qe2 b4 69. g5 b3 70. g6 b2 71. g7 Qbc1 >>>72. g8=Q b1=Q 73. g4 b5 74. g5 b4 75. g6 b3 76. g7 b2 77. Qgh7 Qba2 78. >>>g8=Q b1=Q >>>* >>> >>>The method I used was: >>> >>>1. Sacrifice bishops and knights to get all of the pawns on open files >>>2. Move each king to safety on the edge of the board, with it's own pieces >>>blocking it for protection from checks. This might not be necessary, but it made >>>it simpler to not have to worry about that. >>>3. Promote, promote, promote... >>> >>>I don't think it would be possible to get a higher material value. You have all >>>of your most significantly valued pieces on the board (9 queens for each side), >>>and all of your next highest valued pieces (rooks) also on the board. To add any >>>of the 3 point pieces you have to avoid sacrificing one of them, which will >>>leave you with a pawn instead of a queen. The total gain for keeping a 3 point >>>piece would be (-9 +3 +1) = -5. To get a higher material score I think you would >>>need to find some way to unblock the pawns without sacrificing. Remember, when >>>you sacrifice a pawn, you're really sacrificing a queen. >> >>What a mind-bending final position. Gave crafty quite a headache to find the >>mate in 3. >> >>Crafty v18.15 >> >>White(1): st 999 >>search time set to 999.00. >>White(1): epdpfga \max.epd max.out >>PFGA: EPD record: 1 >>middle-game phase >> clearing hash tables >> time surplus 0.00 time limit 16:39 (16:39) >> nss depth time score variation (1) >> 1 0.25 10.90 1. Qcxc6+ Qxc6 2. Qaxc6+ >> 1 1.76 11.85 1. Qaxa5+ Kb3 2. Qxa2+ Qaxa2 3. Qxc4+ >> 1-> 32.88 11.85 1. Qaxa5+ Kb3 2. Qxa2+ Qaxa2 3. Qxc4+ >> 2 39.79 ++ 1. Qaxa5+!! >> 2 41.24 Mat03 1. Qaxa5+ Kb3 2. Qfb5+ Qxb5+ 3. Qdxb5# >> 2-> 41.27 Mat03 1. Qaxa5+ Kb3 2. Qfb5+ Qxb5+ 3. Qdxb5# >> 3 41.37 Mat03 1. Qaxa5+ Kb3 2. Qfb5+ Qxb5+ 3. Qdxb5# >> 3-> 41.63 Mat03 1. Qaxa5+ Kb3 2. Qfb5+ Qxb5+ 3. Qdxb5# >> 4 42.92 Mat03 1. Qaxa5+ Kb3 2. Qfb5+ Qxb5+ 3. Qdxb5# >> 4-> 46.76 Mat03 1. Qaxa5+ Kb3 2. Qfb5+ Qxb5+ 3. Qdxb5# >> 5 1:04 Mat03 1. Qaxa5+ Kb3 2. Qfb5+ Qxb5+ 3. Qdxb5# >> 5-> 2:02 Mat03 1. Qaxa5+ Kb3 2. Qfb5+ Qxb5+ 3. Qdxb5# >> time=2:02 cpu=99% mat=0 n=684348415 fh=99% nps=5570k >> ext-> chk=7529907 cap=347133 pp=0 1rep=264901 mate=18 >> predicted=0 nodes=684348415 evals=1 >> endgame tablebase-> probes done=0 successful=0 > >I was going to refrain from posting this, but you opened the door. Chessmaster >9000 announces Mate in 3 in 3 seconds on a PIII-600: > >Time Depth Score Positions Moves >0:03 1/3 Mate03 155329 79.Qfxa5+ Kb3 80.Qb5+ Qxb5+ 81.Qxb5# >0:03 1/4 Mate03 158994 79.Qfxa5+ Kb3 80.Qb5+ Qxb5+ 81.Qxb5# >0:03 1/5 Mate03 166523 79.Qfxa5+ Kb3 80.Qb5+ Qxb5+ 81.Qxb5# >0:04 1/6 Mate03 190603 79.Qfxa5+ Kb3 80.Qb5+ Qxb5+ 81.Qxb5# >0:05 1/7 Mate03 232015 79.Qfxa5+ Kb3 80.Qb5+ Qxb5+ 81.Qxb5# > >Additionally, if it is Black to move, it is also a Mate in 3 (with "instant" >results): > >Time Depth Score Positions Moves >0:00 1/3 -Mate03 7403 1...Qcxe2+ 2.Rg4 Qxg4+ 3.Qxg4 Qxg4# >0:00 1/4 -Mate03 8970 1...Qcxe2+ 2.Rg4 Qxg4+ 3.Qxg4 Qxg4# >0:00 1/5 -Mate03 12673 1...Qcxe2+ 2.Rg4 Qxg4+ 3.Qxg4 Qxg4# For sure, when CM9000 smells blood, you better bar the doors. I think probably ChessMaster is the fastest to solve mates for anything that is not a dedicated mate solver.
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