Author: Jeremiah Penery
Date: 03:41:54 02/05/00
Go up one level in this thread
On February 04, 2000 at 19:23:27, blass uri wrote: >On February 04, 2000 at 19:18:25, Jeremiah Penery wrote: > >>On February 04, 2000 at 19:08:53, Dann Corbit wrote: >> >>>On February 04, 2000 at 18:26:04, Enrique Irazoqui wrote: >>> >>>>In game 13 of their match, Nimzo (white) and Shredder reached this position. >>>>Nimzo showed an eval of -2, while Shredder with +7 quit the game and counts it >>>>as a win. I don't think that black can win this. Any opinions? >>>> >>>>Enrique >>>> >>>>[D]8/3k4/6R1/4r3/4nK2/2Pn4/1P6/8 w - - 0 1 >>>The score may look dominant, but if white can trade rooks, it's a draw. The >>>crafty eval is closer to Shredder, but look at the position after we trace the >>>pv a few moves: >>>[D]8/3k4/8/6n1/3K4/2P5/1n6/8 w - - >>>That is clearly a draw. >> >>Tsk, tsk, Dann. TBs are wonderful. The truth is made clear! >> >>White moves and gets mated in 62. >> >>1. Kd5 Ne6 2. c4! Nd3! 3. c5! Nb4+! 4. Kc4! Nc6! 5. Kb5! Kc7! 6. >>Ka6! Ng5! 7. Kb5! Nf3! 8. Kc4! Nfd4! 9. Kd3 Kd7! 10. Ke3! Nb5 11. >>Kf4 Ke6! 12. Ke4! Nbd4! 13. Kf4 Kd5! 14. Ke3! Ke5! 15. Kd3! Kf4! >>16. Kc3! Ke3! 17. Kc4! Ke4! 18. Kc3! Ne6! 19. Kd2! Nf4! 20. Kc3! >>Kd5! 21. Kc2! Kc4! 22. Kd2 Kd4! 23. Ke1! Ke3! 24. Kf1! Kf3! 25. Ke1! >>Nd3+ 26. Kd2 Nde5! 27. Ke1! Nc4! 28. Kf1 Nd2+! 29. Ke1! Ke3! 30. >>Kd1! Nf3! 31. Kc1! Kd4 32. Kc2! Kc4! 33. Kc1! Kc3! 34. Kd1! Kd3! >>35. Kc1! Ne1 36. Kb1! Nc2 37. Kb2! Ne3! 38. Kb3! Kd4! 39. Kb2! Kc4! >>40. Ka2! Kc3! 41. Ka3! Nc2+ 42. Ka4 N2d4! 43. Ka3! Kc2 44. Ka4! Kd2 >>45. Ka3! Kc3! 46. Ka4! Kc4! 47. Ka3! Ne2! 48. Kb2! Kd3! 49. Kb1! >>Kd2! 50. Ka1! Kc2! 51. Ka2! Nc1+ 52. Ka3! Kc3! 53. Ka4! Kc4! 54. >>Ka3! Nd3! 55. Ka4! Nb2+! 56. Ka3! Kc3! 57. Ka2! Nc4! 58. Kb1! Kd2! >>59. Ka2 Kc2! 60. Ka1! Nb4! 61. c6! Nd2 62. c7! Nb3#! >> >>:) > >This line is a draw by the rules of chess after 53.Ka4 because of the 50 move >rule. I completely missed this. >I do not know if this position is a draw or a win by the rules of chess but >tablebases seems not to be so wonderful because they can push you to a drawn >position. Hmph. I'd never seen such a case before, where a won TB ending is drawn by the 50-move rule _after_ entering the proper TB. I assumed such a case didn't really exist (for practical purposes, anyway). Now I am proven wrong. :|
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