Author: Uri Blass
Date: 04:16:14 11/15/01
Go up one level in this thread
On November 15, 2001 at 06:51:23, José Carlos wrote: >On November 15, 2001 at 03:35:23, Dieter Buerssner wrote: > >>The end position in this game is >> >>[D] 8/8/6p1/6Q1/2K4p/6kP/5p2/8 b - - 0 55 >> >>How does your engine evaluate this pos? >> >>[Event "?"] >>[Site "Beersheba ,CBM 09"] >>[Date "1988.??.??"] >>[Round "?"] >>[White "Kortchnoi, V."] >>[Black "Rechlis, G."] >>[WhiteElo "2640"] >>[BlackElo "2475"] >>[ECO "A15"] >>[Result "1/2-1/2"] >> >>1. Nf3 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Bg7 6. Bg2 >>O-O 7. O-O c5 8. Qa4 Nc6 9. Qc4 Nxc3 10. bxc3 b6 11. Qh4 >>Bb7 12. Rb1 e6 13. c4 Qxh4 14. Nxh4 Rab8 15. Nf3 Nb4 >>16. Bb2 Rfd8 17. Bxg7 Kxg7 18. Rb2 Rd6 19. d3 Re8 20. a3 >>Na6 21. Ra1 e5 22. Nd2 Bxg2 23. Kxg2 f5 24. a4 Nb4 25. a5 >>Re7 26. f3 h5 27. h3 Kf6 28. axb6 axb6 29. Ra8 Rdd7 30. Rb1 >>Ra7 31. Ra1 Nc6 32. Nb1 Rxa1 33. Rxa1 Ra7 34. Rxa7 Nxa7 >>35. Nc3 Ke6 36. Nd5 b5 37. Nc7+ Kd7 38. Nxb5 Nxb5 39. cxb5 >>Kc7 40. f4 exf4 41. gxf4 h4 42. Kf2 Kb6 43. Ke3 Kxb5 >>44. Kd2 Kb4 45. Kc2 c4 46. Kb2 cxd3 47. exd3 Kc5 48. Kc3 >>Kd5 49. d4 Ke4 50. Kc4 Kxf4 51. d5 Kg3 52. d6 f4 53. d7 f3 >>54. d8=Q f2 55. Qg5+ 1/2-1/2 > > This is the kind of position programs can chose the right moves, but don't >understand at all. My program says +7.xx for white, but it defends correctly >with black. > I guess this position won't be solved by any program in a long time because it >requires reasoning. You can't write code for positions like this easily, because >an extra pawn here or there makes a difference. So you have to 'think'... the >magic word. I am not sure that this position will not be solved by search I suspect that it is also possible to see forward enough to see a forced repetition or tablebase position so it is possible that tablebases can help. Based on the post that I read they did not help but maybe the poster did not give the programs enough time. The word that puts distance between GM's and programs. GM's can, >given enough time, understand _any_ position. I doubt it And if they misunderstand one and >lose, the next game he'll have learned the lesson. Computers can't do such a >thing. Humans may learn not to lose by similiar way but it is possible that the position included a very complicated tactics and the GM's learned to avoid one mistake only to do another mistake. Uri
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