Author: Rafael Andrist
Date: 03:38:51 12/29/01
Go up one level in this thread
On December 29, 2001 at 06:20:00, Steffen Jakob wrote: >Hi Rafael! > >On December 29, 2001 at 05:50:19, Rafael Andrist wrote: > >>On December 29, 2001 at 04:08:22, Steffen Jakob wrote: >> >>>On December 28, 2001 at 15:27:43, Rafael Andrist wrote: >>> >>>>On December 28, 2001 at 09:10:27, Steffen Jakob wrote: >>>> >>>>>Hi! >>>>> >>>>>Today Hossa played a blitz game with Tinker at ICC where a KBPKP endgame was on >>>>>the board: >>>>> >>>>>8/8/p4b1P/3K4/8/8/8/1k6 b >>>>> >>>>>Hossa evaluates this as a win for black, because the black pawn has a black >>>>>promotion square and there is no white pawn on the b file in front of the black >>>>>pawn. Unfortunately this position is a draw. Can you define a rule for such a >>>>>position class ("search will do it" doesn't count; >>>> >>>>my prog needs 7 ply and a bit less than a second to see the draw. Can you please >>>>post the game + time? >>> >>>I no longer have the time which was spent for each move but only the game score: >>> >>>[Event "ICC 3 1"] >>>[Site "Internet Chess Club"] >>>[Date "2001.12.28"] >>>[Round "-"] >>>[White "Tinker"] >>>[Black "Hossa"] >>>[Result "1/2-1/2"] >>>[ICCResult "Game drawn by repetition"] >>>[WhiteElo "2560"] >>>[BlackElo "2588"] >>>[Opening "French: Tarrasch, open variation"] >>>[ECO "C07"] >>>[NIC "FR.19"] >>>[Time "08:15:24"] >>>[TimeControl "180+1"] >>> >>>1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd6 7. O-O a6 >>>8. Ne4 Qc7 9. Qxd4 Nc6 10. Qc3 e5 11. Bd5 Nf6 12. Nxf6+ gxf6 13. Bd2 Be6 14. >>>Be4 O-O-O 15. Qe3 h5 16. Bc3 Be7 17. a3 Rhg8 18. Bh7 Rh8 19. Bd3 Bf8 20. >>>Rfe1 Bh6 21. Qe4 Ne7 22. Nxe5 fxe5 23. Bxe5 Qc6 24. Bxh8 Qxe4 25. Rxe4 Rxh8 >>>26. Rb1 Nc6 27. Rbe1 Rd8 28. Be2 Bg7 29. b3 Rd2 30. c4 Nd4 31. Bd1 Bf8 32. >>>b4 f5 33. R4e3 Bh6 34. Rh3 Bxc4 35. Bxh5 Rb2 36. Bd1 Bg5 37. Rh8+ Kd7 38. >>>Rh7+ Kc6 39. h4 Bf4 40. Rh8 Bc7 41. Bh5 Be6 42. Rh6 Bd6 43. Rc1+ Kb6 44. Re1 >>>Kc6 45. Rc1+ Kb6 46. Rg6 Bb8 47. Rd1 Be5 48. Rxd4 Bxd4 49. Rxe6+ Kb5 50. >>>Be8+ Kc4 51. Bf7 Kb5 52. Kh2 Ka4 53. f4 Kxa3 54. Bg6 Bf2 55. h5 Rxb4 56. >>>Bxf5 Rxf4 57. g4 Kb2 58. h6 Bd4 59. Re1 b5 60. Rb1+ Ka2 61. Rh1 b4 62. Kg3 >>>Rxf5 63. gxf5 b3 64. f6 Bxf6 65. Kf4 b2 66. Ke4 b1=Q+ 67. Rxb1 Kxb1 68. Kd5 >>>a5 69. Kc5 Bc3 70. h7 Ka2 71. Kc4 Kb2 72. Kb5 Bh8 73. Ka4 Ka1 74. Ka3 Bg7 >>>75. Kb3 Be5 76. Ka4 Bh8 77. Ka3 Bc3 78. Kb3 Bb2 79. Ka4 Bh8 80. Ka3 >>>{Game drawn by repetition} >>>1/2-1/2 >>> >>>Greetings, >>>Steffen. >> >>I went back to move Nr. 65 and saw that even there, the position is already a >>draw. >> >>[D]8/8/p4b1P/8/5K2/1p6/k7/7R b - - 0 65 > >I think so too, but are you sure? I showed the position above because my point >was to emphasize the static evaluation problem. 64. f6?? was a bad move. 64. Kg4 >and then Kg5 looks much better/winning. I think Hossa played f6?? because then >the wrong KBPKP evaluation was active in some lines. from the info you gave I thought Hossa played black. If White can win then 64.f6?? surely gives the win away. Hossa drew a lost endgame, what do you want more? regards Rafael B. Andrist
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