Author: Bernhard Bauer
Date: 02:53:09 08/21/02
Go up one level in this thread
On August 21, 2002 at 04:28:13, Eduard Nemeth wrote: >On August 21, 2002 at 04:00:34, Odd Gunnar Malin wrote: > >>On August 21, 2002 at 03:49:31, Bernhard Bauer wrote: >> >>>On August 20, 2002 at 22:29:44, Eduard Nemeth wrote: >>> >>>>Here played two player with an Elo about 2500: >>>> >>>> >>>>[Event "17th Open Avoine FRA"] >>>>[Site "?"] >>>>[Date "2002.??.??"] >>>>[Round "?"] >>>>[White "Dumitrache,D"] >>>>[Black "Smetankin,S"] >>>>[WhiteElo "2500"] >>>>[BlackElo "2455"] >>>>[ECO "A65"] >>>>[Result "0-1"] >>>> >>>>1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 >>>>7. Bd3 Bg7 8. Nge2 O-O 9. O-O a6 10. a4 Nbd7 11. h3 Re8 >>>>12. Ng3 h5 13. Bg5 Qc7 14. Rc1 Nh7 15. Be3 h4 16. Nge2 Ne5 >>>>17. b4 b6 18. a5 Nxd3 19. Qxd3 c4 20. Qc2 bxa5 21. Qa4 Nf6 >>>>22. Qxa5 Qxa5 23. bxa5 Nxe4 24. Na4 c3 25. Rfd1 Bd7 26. Nb6 >>>>Ra7 27. Bd4 Bh6 28. Rc2 Bb5 29. Nxc3 Nxc3 30. Rxc3 Rae7 >>>>31. Rc8 Bg5 32. Bb2 Kh7 33. Rxe8 Rxe8 34. Bc1 Kh6 35. Bxg5+ >>>>Kxg5 36. Rc1 Re4 37. Rc7 f6 38. Kh2 f5 39. f3 Re2 40. Nc8 >>>>Rd2 41. Nxd6 Rxd5 42. Nxb5 Rxb5 43. Rc6 Rxa5 44. f4+ Kh6 >>>>45. Kg1 Ra2 46. Rc7 a5 47. Ra7 a4 48. Kf1 a3 49. Kg1 Ra1+ >>>>50. Kf2 a2 51. Ra8 Kg7 52. Ra7+ Kf6 53. Ra6+ Ke7 54. Ra7+ >>>>Kd6 55. Ra5 Kc6 56. Ra8 Kd5 57. Ra4 Kc5 58. Ra7 Kc4 59. Ra8 >>>>Kb3 60. Rb8+ Kc3 61. Rc8+ Kd3 62. Ra8 Rc1 63. Rxa2 Rc2+ >>>>64. Rxc2 Kxc2 65. Ke2 Kc3 66. Ke3 Kc4 67. g3 (67. Kf3 Kd3 >>>>68. Kf2 (68. g3 Kd2 69. Kf2 Kd1 $1 70. Kf3 Ke1 $19) >>>>68... Kd2 69. Kf3 Ke1 70. g3 hxg3 71. Kg2 Ke2 72. Kxg3 >>>>Kf1 $19) (67. Ke2 Kd4 68. g3 Ke4 69. Kf2 Kd3 70. Kf3 Kd2 >>>>71. Kf2 Kd1 $19) 67... Kc3 68. gxh4 (68. Ke2 Kd4 69. Kf3 >>>>Kd3 $19) 68... Kc4 69. Ke2 Kd4 70. Kd2 Ke4 71. Ke2 Kxf4 >>>>72. Kf2 Ke4 73. Ke2 f4 74. Kf2 f3 75. Ke1 Kf5 76. Kf1 Ke5 >>>>77. h5 gxh5 78. h4 Kf4 79. Kf2 Kg4 0-1 >>>> >>>>In this game (with my comments) won black with the nice move 62...Rc1! >>>>In my comments you can see, that black can win the pawn-ending, allways! >>>> >>>>But after an moves "only" with his king, black cannot win! >>>> >>>>How many time your program needs, to see that Rc1 this game win? >>>> >>>>Here this position after move 62, white: >>>> >>>>[D]R7/8/6p1/5p2/5P1p/3k3P/p4KP1/r7 b - - >>>> >>>>Eduard >>> >>>Hi Eduard, >>>sorry, but I cannot see the win too. >>>What about 62...Rc1 63.Ra3+ and so on? >>>Could it be that 63.Rxa2 is a blunder that leads to a lost pawn ending? >>>Kind regards >>>Bernhard >> >>Maybe 62...Rc1 63.Ra3+ Rc3 and if not 64.Rxa2 Rc2+ (same position) the pawn will >>promote because of Rc2+ in next anyway follow a kingwalk to help the pawn. >> >>Odd Gunnar > >Right! > >After 63. Ra3+ Rc3 and now 64. Ra8? come Rc2+! and black hould soon a Queen >with Rook + King! > >Eduard You both are right! I overlooked 63...Rc3 64.Rxa2 Rc2+ which leads to the same position. BTW When the type of the position changes significantly by trading pieces, here we go from a rook endgame to a pawn endgame, shoudn't the programs use a greater amount of time for evaluating the resulting position? (Here the pawn endgame). I'm under the impression that programs use nearly all the time for evaluating the rook endgame. If a program would use say 10% of the time to evaluate the sub endgame, chances would be much better not to trade in a lost endgame. Kind regards Bernhard
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