Author: Phil Dixon
Date: 04:01:26 09/22/99
Go up one level in this thread
On September 22, 1999 at 05:24:21, Andreas Stabel wrote: >On September 21, 1999 at 06:45:55, Phil Dixon wrote: > >>On September 21, 1999 at 05:20:06, Andreas Stabel wrote: >> >>>On September 20, 1999 at 18:17:20, Dann Corbit wrote: >>> >>>>On September 20, 1999 at 11:53:07, Shep wrote: >>>>>On September 20, 1999 at 11:05:05, Andreas Stabel wrote: >>>>> >>>>>>1. no promoted pieces, without promotion moves: 109 white moves (W.Cross 1967) >>>>>>2. no promoted pieces : 144 white moves (J.Ban 1960) >>>>>>3. with promoted pieces : 218 white moves (Dickins 1968) >>>>>>4. with all 32 pieces : 99 white moves (HH.Cross 1946) >>>>>> >>>>>>1. 5k2/2K5/3N1B1P/P1NB4/6Q1/4R3/P1PP1P1P/1R6 w - - 0 1 >>>>>>2. n1r1r1b1/1P1P1P1P/1Q6/3NBNK1/R7/4p1p1/3PBPkP/2R5 w - - 0 1 >>>>>>3. 3Q4/1Q4Q1/4Q3/2Q4R/Q4Q2/3Q4/1Q4Rp/1K1BBNNk w - - 0 1 >>>>>>4. q2Q3r/n6R/kpB1N1K1/p1p1Bppp/1PN3P1/1n1pp1b1/P1PPPP1P/r5Rb w - - 0 1 >>>>>> >>>>>>Theese positions may break several chess engines :) >>>>> >>>>>#3 broke every one I tried about 1 year ago: Crafty, MChess, Fritz, ... :) >>>> >>>>Crafty zips right through them now. I suggest that 256 is probably a reasonable >>>>limit for holding possible moves. It fits in an unsigned char for storing the >>>>count. If we have some enormous array of objects that is a function of the move >>>>count, it might be wise to try to trim it though. >>>> >>> >>>I've scanned through the whole granit collection of games, containing a >>>total of 1496327 games and 111941117 moves. The maximum number of legal >>>moves in any position in theese games were only 92, so I think 128 should >>>be more than enough for ordinary chess games. >>> >>>Regards >>>Andreas Stabel >> >>Could you post the game that has a position with 92 moves for one side. I would >>surely like to see an example. I was hoping for something from a real game. >>Many thanks!! >> >>Best regards, >>Phil > >I've downloaded the game now and it is game number 13874 in line 237962 in >the file b.pgn contained in b.zip in the common area of the crafty home >area. This is obviously a game of low quality where white refuses to resign >and black punishes this by promoting a lot of queens. The maximum number of >legal moves occurs after whites move 53. Kf3 > >The FEN of this position is: >2r4k/3r3p/5q1P/8/5P2/5K2/6P1/qq2q3 b - - 0 53 > >Here is the full game: >[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 > > >Regards >Andreas Stabel Thank you very much. I appreciate the effort. Regards, Phil
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