Author: John Merlino
Date: 12:22:08 10/22/04
Go up one level in this thread
On October 22, 2004 at 13:49:53, Dieter Buerssner wrote:
>I have seen the position, when Kramnik played 49...Ke4 seen discussed here, and
>Ke4 was critisized. I analyzed the game from back to front with Yace. After Ke4,
>Kramnik still had a forced win. After 50...Kd3 (Kramnik's move), I get a draw
>score (with quite some backwards analysis). I also looked at Kd5, and it seems
>to be a draw, too. For Kd4, however, I get a score of +5, so I am pretty sure,
>that it is a forced win (for most variations, I got a score of +10, but then I
>lost patience, and thought +5 shall be sufficient).
>
>I had to analyse many lines, to get this score (but everything was rather
>mechanical, I didn't have to really think, just do the moves suggested by the
>engine). The following line could be considered the main line:
>
>[Event "Worldchampionship"]
>[Site "?"]
>[Date "2004.10.16"]
>[Round "?"]
>[White "Leko, Peter"]
>[Black "Kramnik, Vladimir"]
>[ECO "A73"]
>[Result "*"]
>
>1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 d6 5. Nc3 exd5 6. cxd5
>g6 7. Nd2 Bg7 8. e4 O-O 9. Be2 Na6 10. O-O Ne8 11. Nc4 Nac7
>12. a4 f5 13. exf5 Rxf5 14. Bg4 Rf8 15. Bxc8 Rxc8 16. Qb3
>b6 17. Nb5 Nxb5 18. axb5 Rc7 19. Bd2 Rcf7 20. Bc3 Qd7
>21. f3 g5 22. Ne3 Rf4 23. Rfe1 h5 24. Qc2 Qf7 25. h3 Bd4
>26. Bxd4 Rxd4 27. Nf5 Qxf5 28. Qxf5 Rxf5 29. Rxe8+ Kf7
>30. Rb8 Rdxd5 31. Rxa7+ Ke6 32. Re8+ Kf6 33. g4 hxg4
>34. hxg4 Rd1+ 35. Kf2 Re5 36. Rh8 Rd2+ 37. Kg3 Ree2
>38. Rf8+ Kg6 39. Rg8+ Kf6 40. Rf8+ Ke6 41. Re8+ Kd5
>42. Rxe2 Rxe2 43. Rg7 Re5 44. Rb7 c4 45. Rxb6 Re2 46. f4
>Re3+ 47. Kf2 gxf4 48. Rb8 Rb3 49. b6 Ke4 50. Re8+ Kd4 {See
>diagram. Here Kramnik moved Kd3 and the game ended draw}
>51. Re2 f3 52. Rd2+ Ke4 53. Rxd6 Rxb2+ 54. Kg3 f2 55. Re6+
>Kd5 56. Rf6 c3 57. Rxf2 c2 58. Rf5+ Kc6 59. Rf8 Kb7
>60. Rf7+ Kxb6 61. Rf6+ Kb5 62. Rf5+ Kb4 63. Rf4+ Kb3
>64. Rf3+ Ka2 65. Rf1 {mate in 38 or better} *
>
>[D] 4R3/8/1P1p4/8/2p1kpP1/1r6/1P3K2/8 b - - 2 50
>
>Any engine, that moves Kd4 here? Does it give Kd4 a significant better score,
>than other moves?
>
>Regards,
>Dieter
CM9_SKR on an AMD 2500 likes Kd4 after a few seconds. But the score does not
even reach +1 after a long think:
Time Depth Score Positions Moves
0:00 1/3 -0.46 642 50...Kd5 51.g5 Rxb2+ 52.Kf3 Rxb6
53.Kxf4
0:00 1/4 -0.64 2195 50...Kd5 51.g5 Rxb6 52.Kf3 Rxb2
53.Kxf4
0:00 1/5 -0.17 4550 50...Kd5 51.Re2 f3 52.Rd2+ Ke4
53.Rc2 Rxb6 54.Rxc4+ Kd5
0:00 1/5 -0.52 6036 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+
53.Kf3
0:00 1/6 -0.33 9801 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+
53.Kf3 d5 54.g7
0:00 1/7 -0.13 19418 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+
53.Kf3 c3 54.g7 c2 55.Rc8
0:00 1/7 -0.27 25829 50...Kd3 51.Re2 Rxb6 52.Kf3 d5
53.Rg2 d4 54.Kxf4
0:00 1/8 -0.10 55223 50...Kd3 51.g5 Rxb2+ 52.Kf3 Rxb6
53.g6 Rb7 54.Rd8 c3 55.Rxd6+ Kc4
56.Kxf4
0:01 1/8 -0.20 66714 50...Kd5 51.Re2 Rxb6 52.Kf3 Rb7
53.Kxf4 Rf7+ 54.Kg3 Rg7 55.Rd2+ Ke5
0:01 2/9 -0.39 113778 50...Kd5 51.Re2 Kc5 52.g5 d5 53.g6
Rxb6 54.g7 Rg6 55.Re7 d4
0:02 3/10 -0.45 297017 50...Kd5 51.Re2 Kc5 52.b7 d5 53.g5
d4 54.g6 Rxb7 55.Kf3 Rg7
0:03 4/11 -0.40 577889 50...Kd5 51.Re2 Kc5 52.g5 Kxb6
53.Re1 d5 54.g6 d4 55.g7 Rg3 56.Rg1
0:04 4/11 -0.62 895584 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+
53.Kf3 Rb7 54.Re4+ Kd5 55.Rxf4
c3 56.Ke2 c2 57.Kd2
0:06 5/12 -0.52 1372751 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+
53.Kf3 Rb7 54.Kxf4 Rg7 55.Kf5 d5
56.Kf6 Rc7
0:10 6/13 -0.55 2768102 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+
53.Kf3 Rb7 54.Kxf4 Rg7 55.Kf5 c3
56.Rd8 Kd5 57.Kf6 Rc7
0:23 7/14 -0.42 6436668 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+
53.Kf3 Rb7 54.Kxf4 Rc7 55.Re1 c3
56.Rd1+ Kc4 57.Rg1 c2 58.Ke3 Kd5
1:08 8/15 -0.67 19941389 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+
53.Kf3 Rb7 54.Kxf4 Rc7 55.Re1 c3
56.Rd1+ Kc4 57.Rg1 c2 58.Ke3 Kd5
59.Rg5+ Ke6
2:31 9/16 -0.56 45782798 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+
53.Kf3 Rb7 54.Kxf4 Rc7 55.Re1 c3
56.Rd1+ Kc4 57.Rg1 Kd3 58.Rd1+
Ke2 59.Rxd6 c2 60.Re6+ Kd2 61.Rd6+
Ke1
7:54 10/17 -0.87 145564859 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+
53.Kf3 Rb7 54.Re4+ Kd3 55.Re1 c3
56.Rd1+ Kc4 57.Rxd6 Rc7 58.Rd1
c2 59.Rc1 Kd3 60.Kxf4 Rc4+ 61.Ke5
29:38 11/18 -0.81 543792622 50...Kd4 51.Re2 f3 52.Re1 Rxb2+
53.Kxf3 Rxb6 54.Rd1+ Kc5 55.Ke4
Rb2 56.Rd5+ Kc6 57.Rd1 Re2+ 58.Kf3
Re6 59.g5 Rg6 60.Kf4 c3 61.Kf5 c2
jm
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