Author: Uri Blass
Date: 11:13:54 02/16/04
Go up one level in this thread
On February 16, 2004 at 05:47:07, Uri Blass wrote: >On February 16, 2004 at 02:20:38, Kurt Utzinger wrote: > >>On February 15, 2004 at 15:47:07, Jaime Benito de Valle Ruiz wrote: >> >>>On February 15, 2004 at 14:42:04, Kurt Utzinger wrote: >>> >>>>"seems" is the wrong expression here. The move Ke3 is >>>>indeed an easy win for White. >>>>Kurt >>> >>>Come on, don't be so picky!. I've spent hours studying this position by using >>>backwards analysis with a few programs, and finally leaving Shredder for >>>hours... getting the same answer again and again. I just wouldn't bet my life on >>>it, but I'm almost as sure as you are. >>>Regards, >>> >>> Jaime >> >> >> Hi Jaime >> This was a position I didn't even use a PC to come within >> 20 seconds to the right conclusion. It's a simple pawn ending >> of the type "Zugzwang". >> Kurt > >It is not a simple pawn endgame and I guess that you are simply a very strong >chess player(at least master level) at least if we talk about pawn endgames. > >The player with the white pieces has Fide rating of 2214 and Israeli rating of >2267 amd he did not find that Ke4 is winning during the game and even did not >find it in analysis after the game(he felt that he missed a win in the pawn >endgame but did not know exactly in what position it happened and after some >analysis he came to the conclusion that he probably did not evaluate correctly >the pawn endgame). > >Time control was 90 minutes per game+30 seconds per move. > >Uri I also think that black blundered in the game by 39...a5 please correct me if I am wrong but it seems based on computer analysis that 39...Kd7 is a draw Yace that already learned that 39...a5 is bad fails high on 39...Kd7 at depth 25 New game - Yace Paderborn [D]8/8/pp2k2p/4p3/1PP3p1/P2K2P1/7P/8 b - c3 0 1 Analysis by Yace Paderborn: 39...h5 = (-0.20) Depth: 1 00:00:00 39...h5 = (-0.20) Depth: 1 00:00:00 39...h5 40.Ke4 = (0.00) Depth: 2 00:00:00 39...Kf5 40.h4 = (-0.03) Depth: 2 00:00:00 39...Kf5 40.h4 = (-0.03) Depth: 2 00:00:00 39...Kf5 40.h4 = (-0.03) Depth: 2 00:00:00 39...Kf5 40.c5 e4+ 41.Kd4 = (-0.05) Depth: 3 00:00:00 39...Kf5 40.c5 e4+ 41.Kd4 = (-0.05) Depth: 3 00:00:00 39...Kf5 40.c5 e4+ 41.Kd4 = (-0.05) Depth: 4 00:00:00 39...Kf5 40.c5 e4+ 41.Kd4 = (-0.05) Depth: 4 00:00:00 39...Kf5 40.c5 e4+ 41.Kd4 bxc5+ 42.bxc5 = (0.06) Depth: 5 00:00:00 39...h5 40.Ke4 Kd6 41.a4 a5 42.bxa5 bxa5 = (0.00) Depth: 5 00:00:00 39...h5 40.Ke4 Kd6 41.a4 a5 42.bxa5 bxa5 = (0.00) Depth: 5 00:00:00 39...h5 40.Ke4 Kd6 41.a4 a5 42.bxa5 bxa5 = (0.00) Depth: 5 00:00:00 39...h5 40.Ke4 Kd6 41.Kf5 b5 42.c5+ Kd5 ² (0.32) Depth: 6/8 00:00:00 3kN 39...Kf5 40.c5 e4+ 41.Kd4 bxc5+ 42.bxc5 = (0.06) Depth: 6/8 00:00:00 4kN 39...Kf5 40.c5 bxc5 41.bxc5 e4+ 42.Kd4 h5 = (-0.02) Depth: 6/8 00:00:00 5kN 39...Kf5 40.c5 bxc5 41.bxc5 e4+ 42.Kd4 h5 = (-0.02) Depth: 6/10 00:00:00 6kN 39...Kf5 40.c5 bxc5 41.bxc5 e4+ 42.Kd4 h5 43.c6 = (0.23) Depth: 7/10 00:00:00 10kN 39...b5 40.c5 Kd5 41.Kd2 h5 42.Ke3 a5 = (0.22) Depth: 7/10 00:00:00 14kN 39...b5 40.c5 Kd5 41.Kd2 h5 42.Ke3 a5 = (0.22) Depth: 7/10 00:00:00 15kN 39...Ke7 40.a4 Kd6 41.b5 axb5 42.Ke2 Kc6 43.cxb5+ Kc7 = (0.21) Depth: 7/12 00:00:00 18kN 39...Ke7 40.c5 bxc5 41.bxc5 Kd7 42.Kc4 e4 43.Kd4 = (0.17) Depth: 7/12 00:00:01 21kN 39...Kd7 40.c5 bxc5 41.bxc5 h5 42.a4 Kc6 43.h4 = (0.15) Depth: 7/12 00:00:01 24kN 39...Kd7 40.Ke4 Kd6 41.Kf5 h5 42.Ke4 Ke6 43.c5 bxc5 44.bxc5 = (0.20) Depth: 7/12 00:00:01 25kN 39...Ke7 40.c5 bxc5 41.bxc5 Kd7 42.Kc4 e4 43.Kd4 = (0.17) Depth: 7/12 00:00:01 25kN 39...Ke7 40.c5 bxc5 41.bxc5 Kd7 42.Kc4 e4 43.Kd4 = (0.17) Depth: 7/12 00:00:01 25kN 39...Ke7 40.Ke4 Kd6 41.Kf5 h5 42.Ke4 Ke6 43.Ke3 Kd6 44.Ke4 Ke6 45.Ke3 Kd6 46.Ke4 = (0.20) Depth: 8/12 00:00:01 37kN 39...Ke7 40.Ke4 Kd6 41.Kf5 h5 42.Ke4 Ke6 43.Ke3 Kd6 44.Ke4 Ke6 45.Ke3 Kd6 46.Ke4 = (0.20) Depth: 8/17 00:00:01 46kN 39...Ke7 40.Ke4 Ke6 41.c5 b5 42.Ke3 Kd5 43.Kd3 h5 ² (0.27) Depth: 9/17 00:00:01 66kN 39...b5 40.a4 bxa4 41.Kd2 Kd7 42.Kc2 Kc6 43.Kb2 a3+ 44.Kxa3 = (0.23) Depth: 9/17 00:00:01 77kN 39...b5 40.c5 Kd5 41.Ke2 a5 42.bxa5 Kxc5 43.Ke3 Kd5 44.a6 = (0.16) Depth: 9/17 00:00:01 85kN 39...h5 40.Ke4 Kd6 41.Ke3 b5 42.c5+ Kd5 43.Ke2 a5 44.Ke3 a4 = (0.15) Depth: 9/17 00:00:01 109kN 39...h5 40.Ke4 Kd6 41.a4 a5 42.c5+ bxc5 43.bxa5 h4 44.gxh4 = (0.02) Depth: 9/17 00:00:01 116kN 39...h5 40.Ke4 Kd6 41.a4 a5 42.c5+ bxc5 43.bxa5 h4 44.gxh4 = (0.02) Depth: 9/17 00:00:01 125kN 39...h5 40.Ke4 Kd6 41.Kf5 e4 42.Kxe4 Kd7 43.c5 Kc7 44.a4 bxc5 ² (0.42) Depth: 10/17 00:00:01 142kN 39...h5 40.Ke4 Kf6 41.Kd5 Kf5 42.Kc6 a5 43.b5 e4 44.Kxb6 ± (0.80) Depth: 10/17 00:00:01 182kN 39...b5 40.Kc3 bxc4 41.a4 e4 42.Kxc4 Kf6 43.Kd4 Kf5 44.Kd5 a5 45.Kd4 e3 46.Kxe3 axb4 ± (0.74) Depth: 10/17 00:00:02 207kN 39...b5 40.c5 Kd5 41.Ke3 h5 42.Kd3 a5 43.Ke3 a4 44.h4 ² (0.29) Depth: 10/17 00:00:02 232kN 39...b5 40.c5 Kd5 41.Ke3 h5 42.Kd3 a5 43.Ke3 a4 44.h4 ² (0.29) Depth: 10/19 00:00:02 271kN 39...b5 40.c5 Kf5 41.Ke3 Kf6 42.Ke2 Ke7 43.Kd2 Ke6 44.Kc3 Kd5 45.Kb2 e4 46.Kc1 a5 47.bxa5 Kxc5 48.a6 Kb6 49.Kd2 ² (0.27) Depth: 11/19 00:00:02 392kN 39...Ke7 40.Ke3 b5 41.Ke4 bxc4 42.Kf5 h5 43.Kg5 Ke6 44.Kxh5 a5 45.Kxg4 ² (0.26) Depth: 11/21 00:00:02 480kN 39...Ke7 40.Ke3 b5 41.c5 Kd7 42.Ke2 Ke7 43.Kd2 Ke6 44.Kd3 Kf5 45.Ke3 Kf6 46.Ke2 e4 47.Kd2 Ke6 48.Kc2 Kd5 49.Kc1 a5 50.bxa5 Kxc5 51.a6 Kb6 52.Kd2 = (0.24) Depth: 11/21 00:00:02 491kN 39...Kd7 40.Ke4 Ke6 41.Ke3 Kd7 42.b5 a5 43.Ke4 Ke6 44.c5 bxc5 45.b6 Kd6 46.b7 Kc7 47.a4 = (0.23) Depth: 11/21 00:00:02 542kN 39...Kd7 40.Ke4 Ke6 41.c5 bxc5 42.bxc5 a5 43.a4 h5 44.c6 Kd6 45.h4 Kxc6 = (0.09) Depth: 11/21 00:00:02 565kN 39...Kd7 40.Ke4 Ke6 41.c5 bxc5 42.bxc5 a5 43.a4 h5 44.c6 Kd6 45.h4 Kxc6 = (0.09) Depth: 11/21 00:00:02 613kN 39...Kd7 40.Ke4 Ke6 41.a4 h5 42.Ke3 a5 43.c5 bxc5 44.bxa5 Kd5 45.a6 Kc6 46.a7 Kb7 47.Ke4 Kxa7 48.Kxe5 = (0.06) Depth: 12/21 00:00:02 817kN 39...Kd7 40.Ke4 Ke6 41.a4 h5 42.Ke3 a5 43.c5 bxc5 44.bxa5 Kd5 45.a6 Kc6 46.a7 Kb7 47.Ke4 Kxa7 48.Kxe5 = (0.06) Depth: 12/22 00:00:03 1185kN 39...Kd7 40.Ke4 Ke6 41.c5 bxc5 42.bxc5 a5 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 a4 46.Kd5 Kd7 47.h4 = (0.02) Depth: 13/23 00:00:04 1550kN 39...Kd7 40.Ke4 Ke6 41.c5 bxc5 42.bxc5 a5 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 a4 46.Kd5 Kd7 47.h4 = (0.02) Depth: 13/23 00:00:05 1791kN 39...Kd7 40.Ke4 Ke6 41.c5 Kf6 42.Ke3 bxc5 43.bxc5 e4 44.Kxe4 Ke6 45.a4 Ke7 46.c6 Ke6 47.c7 Kd7 48.c8Q+ Kxc8 49.h4 ² (0.42) Depth: 14/23 00:00:05 1903kN 39...Kd7 40.Ke4 Kd6 41.Kf5 h5 42.Kg5 Ke6 43.Kxh5 Kf5 44.c5 bxc5 45.bxc5 e4 46.c6 e3 ± (1.04) Depth: 14/24 00:00:07 2787kN 39...b5 40.c5 Kd5 41.Ke3 h5 42.Kd3 a5 43.Kc3 e4 44.c6 Kxc6 45.bxa5 h4 46.gxh4 Kd6 ± (1.03) Depth: 14/24 00:00:08 3433kN 39...b5 40.c5 Kd5 41.Ke3 Ke6 42.Ke4 h5 43.Ke3 Ke7 44.Kd2 Ke6 45.Ke2 Kd7 46.Ke3 Ke7 47.Kd2 Ke6 48.Ke2 Kd7 49.Ke3 Ke7 ² (0.42) Depth: 14/24 00:00:09 3651kN 39...b5 40.c5 Kd5 41.Ke3 Ke6 42.Ke4 h5 43.Ke3 Ke7 44.Kd2 Ke6 45.Ke2 Kd7 46.Ke3 Ke7 47.Kd2 Ke6 48.Ke2 Kd7 49.Ke3 Ke7 ² (0.42) Depth: 14/25 00:00:09 4004kN 39...b5 40.c5 Kd5 41.Ke3 Ke6 42.Ke4 h5 43.Ke3 Ke7 44.Kd2 Ke6 45.Ke1 Kd5 46.Ke2 Ke6 ² (0.39) Depth: 15/25 00:00:11 4806kN 39...b5 40.c5 Kd5 41.Ke3 Ke6 42.Ke4 h5 43.Ke3 Ke7 44.Kd2 Ke6 45.Ke1 Kd5 46.Ke2 Ke6 ² (0.39) Depth: 15/26 00:00:13 5679kN 39...b5 40.c5 Kd5 41.Ke3 Ke6 42.Ke4 h5 43.Ke3 Ke7 44.Kd2 Ke6 45.Kd1 Ke7 46.Kc2 e4 47.Kd2 ² (0.40) Depth: 16/26 00:00:16 7124kN 39...b5 40.c5 Kd5 41.Ke3 Ke6 42.Ke4 h5 43.Ke3 Ke7 44.Kd2 Ke6 45.Kd1 Ke7 46.Kc2 e4 47.Kd2 ² (0.40) Depth: 16/28 00:00:19 8459kN 39...b5 40.c5 Kd5 41.Ke3 Ke6 42.Ke4 h5 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kb7 46.Kf4 Kc6 47.Kg5 Kd6 48.Kxh5 a5 ± (0.80) Depth: 17/29 00:00:21 9310kN 39...b5 40.c5 Kd5 41.Ke3 Ke6 42.Ke4 h5 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kc6 46.Kf5 Kd5 47.Kg5 Ke4 48.Kxh5 Kf3 ± (0.86) Depth: 17/29 00:00:25 11391kN 39...b5 40.c5 Kd5 41.Ke3 Ke6 42.Ke4 h5 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kc6 46.Kf5 Kd5 47.Kg5 Ke4 48.Kxh5 Kf3 ± (0.86) Depth: 17/29 00:00:30 13813kN 39...b5 40.c5 Kd5 41.Ke3 e4 42.Kf4 Kd4 43.c6 e3 44.c7 e2 45.c8Q e1Q 46.Qc5+ Kd3 47.Qd6+ Kc4 48.Qxa6 Qe2 49.Qc8+ Kb3 50.Qxg4 Qxh2 51.Qf3+ Kb2 ± (0.98) Depth: 18/32 00:00:43 19366kN 39...Kd7 40.Ke4 Ke6 41.c5 bxc5 42.bxc5 h5 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kc6 46.Kf5 Kd5 47.Kg5 Ke4 48.a4 Kf3 49.Kg6 Ke3 50.Kxh5 ± (0.97) Depth: 18/32 00:01:00 27367kN 39...Kd7 40.Ke4 Ke6 41.c5 h5 42.cxb6 h4 43.gxh4 a5 44.bxa5 Kd6 45.b7 g3 46.b8Q+ Ke6 ± (0.97) Depth: 18/32 00:01:00 27540kN 39...Kd7 40.Ke4 Ke6 41.c5 h5 42.cxb6 h4 43.gxh4 a5 44.bxa5 Kd6 45.b7 g3 46.b8Q+ Ke6 ± (0.97) Depth: 18/32 00:01:10 31896kN 39...Kd7 40.Ke4 Ke6 41.c5 h5 42.cxb6 h4 43.gxh4 Kd7 44.b7 g3 45.b8Q gxh2 46.Kxe5 h1Q 47.Qa7+ Kc8 ± (1.37) Depth: 19/32 00:01:16 35019kN 39...Kd7 40.Ke4 Kd6 41.Kf5 h5 42.Kg5 e4 43.a4 e3 44.Kh6 e2 45.a5 e1Q 46.axb6 ± (1.37) Depth: 19/32 00:01:39 45813kN 39...b5 40.c5 Kd5 41.Ke3 e4 42.Kf4 Kd4 43.c6 e3 44.c7 e2 45.c8Q e1Q 46.Qc5+ Kd3 47.Qd6+ Kc4 48.Qxa6 Qe2 49.Qc8+ Kb3 50.h3 gxh3 51.g4 ± (1.36) Depth: 19/32 00:01:54 52960kN 39...b5 40.c5 Kd5 41.Ke3 e4 42.Kf4 Kd4 43.c6 e3 44.c7 e2 45.c8Q e1Q 46.Qc5+ Kd3 47.Kxg4 Qe4+ 48.Kh3 Qe6+ 49.g4 Ke2 50.Qc2+ Ke3 51.Kh4 Qd5 ± (0.96) Depth: 19/33 00:02:04 57766kN 39...b5 40.c5 Kd5 41.Ke3 e4 42.Kf4 Kd4 43.c6 e3 44.c7 e2 45.c8Q e1Q 46.Qc5+ Kd3 47.Kxg4 Qe4+ 48.Kh3 Qe6+ 49.g4 Ke2 50.Qc2+ Ke3 51.Kh4 Qd5 ± (0.96) Depth: 19/33 00:02:28 67677kN 39...b5 40.c5 Kd7 41.Ke3 Ke7 42.c6 Ke6 43.c7 Kd7 44.c8Q+ Kxc8 45.Ke4 Kb7 46.Kf5 ± (0.95) Depth: 20/34 00:03:17 89972kN 39...b5 40.c5 Kd7 41.Ke3 Ke7 42.c6 Ke6 43.c7 Kd7 44.c8Q+ Kxc8 45.Ke4 Kb7 46.Kf5 ± (0.95) Depth: 20/34 00:03:52 105989kN 39...b5 40.c5 Ke7 41.Ke3 Kd7 42.Ke4 Ke6 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kb7 46.Kf4 Kc6 47.Ke4 Kd6 48.Kd3 Kd5 49.Kc3 h5 50.Kb3 Ke6 ± (0.90) Depth: 21/38 00:06:28 177042kN 39...b5 40.c5 Ke7 41.Ke3 Kd7 42.Ke4 Ke6 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kb7 46.Kf4 Kc6 47.Ke4 Kd6 48.Kd3 Kd5 49.Kc3 h5 50.Kb3 Ke6 ± (0.90) Depth: 21/38 00:07:27 203904kN 39...b5 40.c5 Ke7 41.Ke3 Kd7 42.Ke4 Ke6 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kc6 46.Ke6 a5 47.bxa5 Kc7 48.a6 h5 ± (0.90) Depth: 22/38 00:10:14 281714kN 39...b5 40.c5 Ke7 41.Ke3 Kd7 42.Ke4 Ke6 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kc6 46.Ke6 a5 47.bxa5 Kc7 48.a6 h5 49.a7 Kb7 50.Kf5 Kxa7 51.Kg5 ± (0.90) Depth: 22/38 00:12:26 340932kN 39...b5 40.c5 Ke7 41.c6 Ke6 42.c7 Kd7 43.Ke4 Kc8 44.Kxe5 Kxc7 ± (1.28) Depth: 23/40 00:17:08 468539kN 39...Kd7 40.Ke4 Ke6 41.c5 bxc5 42.bxc5 a5 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kc6 46.Kf5 Kc5 47.Kxg4 Kc4 48.h4 Kb3 49.Kh5 ± (1.27) Depth: 23/40 00:23:20 641659kN 39...Kd7 40.Ke4 Ke6 41.c5 bxc5 42.bxc5 a5 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kc6 46.Kf5 Kb5 47.Kxg4 Ka4 48.Kf5 Kxa3 49.Kg6 a4 50.h4 Kb3 51.Kxh6 a3 ± (0.92) Depth: 23/40 00:27:04 745627kN 39...Kd7 40.Ke4 Ke6 41.c5 bxc5 42.bxc5 a5 43.c6 Kd6 44.c7 Kxc7 45.Kxe5 Kc6 46.Kf5 Kb5 47.Kxg4 Ka4 48.Kf5 Kxa3 49.Kg6 a4 50.h4 Kb3 51.Kxh6 a3 ± (0.92) Depth: 23/40 00:31:22 856399kN 39...Kd7 40.Ke4 Ke6 41.Ke3 Kd7 42.Kd3 Kd6 43.Ke4 Ke6 44.Ke3 Kd7 45.Kd3 Kd6 46.Ke4 Ke6 ± (0.92) Depth: 24/40 00:41:51 1146716kN 39...Kd7 40.Ke4 Ke6 41.Ke3 Kd7 42.Kd3 Kd6 43.Ke4 Ke6 44.Ke3 Kd7 45.Kd3 Kd6 46.Ke4 Ke6 ± (0.92) Depth: 24/41 00:56:02 1498232kN 39...Kd7 40.Ke4 Ke6 41.Ke3 Kd6 42.c5+ bxc5 43.bxc5+ Kxc5 44.Ke4 h5 45.Kxe5 Kc4 46.a4 Kc3 47.a5 Kb3 48.Kf5 Ka4 49.Kf4 Kxa5 50.Ke3 Kb4 ² (0.52) Depth: 25/42 01:12:17 1935770kN (Blass, Tel-Aviv 16.02.2004) Uri
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