Author: Ernst Walet
Date: 13:04:43 08/16/04
Go up one level in this thread
On August 16, 2004 at 08:46:12, Vincent Lejeune wrote: >I found this position here http://www.fierz.ch/pontresina.htm , after I searched >10 min with no board and then 10 with a board and then 20 with chessengine, I >gave up ... is this position buggy ?? > >pasting : > > A cool (and very instructive) position which occurred in round 5: black to move >and win! This one is harder than you think :-) >Click here for a hint! >The obvious 1... c4+ only draws. To win, you need to know something about >'corresponding squares'. > >[d]8/8/4p2p/1kp1P1p1/1p4P1/1P1K2P1/7P/8 b - - 0 1 I let S8 run for a while and it thinks Kc6 is the winning move. Hardware AthlonXP@2200MHz. CPU0: AuthenticAMD x86 Family 6 Model 8 Stepping 1 2200 MHz GUI: Tablebases with 5 pieces found! [Cache: 64 MB + internal 13.67 MB] Engine: Shredder 8 (1024 MB) by Stefan Meyer-Kahlen Position: 0 1 1/03 0:00 +0.33++ 1...c4+ 2.Kd4 (13) 0 1/03 0:00 +0.33 1...c4+ 2.bxc4+ Kc5 (23) 0 2/06 0:00 +0.32 1...c4+ 2.bxc4+ Kc5 3.h4 (79) 2 3/06 0:00 +0.01-- 1...c4+ 2.bxc4+ Kb6 3.h4 h5 (140) 4 3/07 0:00 -0.12 1...c4+ 2.bxc4+ Kc5 3.h4 Kc6 (289) 9 4/08 0:00 -0.20 1...c4+ 2.bxc4+ Kc5 3.h4 gxh4 4.gxh4 (597) 19 5/10 0:00 +0.40++ 1...c4+ 2.bxc4+ Kc5 3.h4 gxh4 4.gxh4 b3 (1.085) 23 5/10 0:00 +0.40 1...c4+ 2.bxc4+ Kc5 3.h4 gxh4 4.gxh4 b3 (1.278) 27 6/10 0:00 -0.13-- 1...c4+ 2.bxc4+ Kc5 3.h4 b3 4.Kc3 gxh4 5.Kxb3 hxg3 (1.683) 36 6/10 0:00 -0.63-- 1...c4+ 2.bxc4+ Kc6 3.Kc2 Kb6 4.Kb3 Ka5 5.h4 gxh4 (1.826) 39 6/11 0:00 -0.74 1...c4+ 2.bxc4+ Kc5 3.h4 Kb6 4.Kc2 Kc5 5.Kb3 (2.834) 61 6/11 0:00 -0.52++ 1...Kb6 2.h4 Kc6 3.hxg5 hxg5 4.Kc2 c4 5.bxc4 (3.012) 65 6/11 0:00 -0.38 1...Kb6 2.Kc4 Kc6 3.h3 Kb6 4.h4 h5 (3.191) 69 6/11 0:00 -0.32++ 1...Kc6 2.Ke3 Kb6 3.Ke4 Kc6 4.Ke3 Kb6 5.Ke4 Kc6 6.Ke3 Kb6 (3.558) 77 6/11 0:00 -0.17 1...Kc6 2.Kc4 Kb6 3.h3 Kc6 4.h4 Kb6 5.hxg5 hxg5 (3.790) 82 7/08 0:00 -0.51-- 1...Kc6 2.Kc4 Kb6 3.h3 Kc6 4.h4 Kb6 5.hxg5 hxg5 (4.237) 92 7/09 0:00 -0.26 1...Kc6 2.Kc4 Kb6 3.h4 Kc6 4.h5 Kb6 (4.521) 98 8/10 0:00 -0.35 1...Kc6 2.Kc4 Kb6 3.h3 Kc6 4.h4 Kb6 5.Kd3 Kc6 6.Ke4 c4 7.bxc4 (5.976) 96 8/12 0:00 -0.33++ 1...Kb6 2.h3 Kc6 3.Ke4 c4 4.bxc4 Kb6 5.Kd4 (7.038) 113 8/12 0:00 -0.03 1...Kb6 2.Kc4 Kc6 3.h3 Kb6 4.h4 Kc6 5.h5 Kb6 6.Kd3 (7.848) 126 9/12 0:00 -0.03 1...Kb6 2.Kc4 Kc6 3.h3 Kb6 4.h4 Kc6 5.h5 Kb6 6.Kd3 (9.424) 152 9/12 0:00 -0.02++ 1...Kc6 2.Kc4 Kb6 3.h4 Kc6 4.h5 Kb6 5.Kd3 Kc6 (10.799) 174 9/12 0:00 -0.02 1...Kc6 2.Kc4 Kb6 3.h4 Kc6 4.h5 Kb6 5.Kd3 Kc6 (11.144) 179 10/12 0:00 0.00 1...Kc6 2.Kc4 Kb6 3.h4 Kc6 4.h5 Kb6 5.Kd3 Kc6 6.Kc4 Kb6 7.Kd3 Kc6 8.Kc4 Kb6 (14.539) 186 11/13 0:00 0.00 1...Kc6 2.Kc4 Kb6 3.h3 Kc6 4.h4 Kb6 5.hxg5 hxg5 6.Kd3 Kc6 7.Kc4 Kb6 8.Kd3 Kc6 9.Kc4 Kb6 10.Kd3 (19.637) 211 12/15 0:00 +0.08 1...Kc6 2.Ke4 Kb7 3.h4 Kc6 4.Ke3 c4 5.hxg5 hxg5 6.bxc4 Kd7 7.Kd3 Kc7 (44.855) 358 12/15 0:00 +0.09++ 1...Kb6 2.Ke3 Kc6 3.Ke4 Kb7 4.h4 Kc6 5.Ke3 Kd5 6.Kd2 Kxe5 7.Kd3 gxh4 8.Kc4 hxg3 9.Kxc5 g2 10.Kc6 g1Q (50.309) 359 12/19 0:00 +0.09 1...Kb6 2.Ke3 Kb7 3.Kd3 Kc7 4.Ke4 Kb7 5.h4 Kc6 6.Ke3 Kd5 7.Kd2 Kxe5 8.Kd3 gxh4 9.Kc4 hxg3 10.Kxc5 g2 11.Kc6 g1Q (54.000) 385 12/21 0:01 +0.10++ 1...c4+ 2.Ke3 cxb3 3.Ke4 Kc5 4.Kd3 b2 5.Kc2 b1Q+ 6.Kxb1 Kc4 7.h4 gxh4 8.Kb2 hxg3 9.Ka1 (76.837) 64 12/21 0:01 +0.45++ 1...c4+ 2.Ke3 cxb3 3.Ke4 Kc5 4.h4 gxh4 5.Kd3 (82.827) 68 12/32 0:02 +0.45 1...c4+ 2.bxc4+ Kc5 3.h4 b3 4.hxg5 b2 5.Kc2 Kxc4 6.gxh6 b1Q+ 7.Kxb1 Kb4 8.g5 Kb3 9.g6 (664.709) 332 13/23 0:02 +0.48 1...c4+ 2.bxc4+ Kc5 3.h3 b3 4.Ke4 Kxc4 5.h4 gxh4 6.Kf3 (689.418) 286 14/32 0:02 +0.73++ 1...c4+ 2.bxc4+ Ka4 3.h4 b3 4.Kc3 Ka3 5.Kd3 Kb4 6.Kd4 gxh4 7.g5 hxg3 8.gxh6 (774.928) 277 14/32 0:02 +0.76 1...c4+ 2.bxc4+ Ka4 3.Kc2 b3+ 4.Kb2 Kb4 5.c5 Kxc5 6.Kxb3 Kd5 7.Kc2 Kxe5 8.Kd3 Kd5 9.h4 (803.827) 282 15/32 0:03 +0.73 1...c4+ 2.bxc4+ Ka4 3.Kc2 b3+ 4.Kb2 Kb4 5.c5 Kxc5 6.Kxb3 Kd5 7.Kc2 Kxe5 8.Kd3 Kd5 9.h4 e5 (870.630) 259 16/34 0:03 +0.78 1...c4+ 2.bxc4+ Ka4 3.Kc2 b3+ 4.Kb2 Kb4 5.c5 Kxc5 6.Kxb3 Kd5 7.Kc2 Kxe5 8.Kd3 Kd5 9.h4 e5 10.Ke3 (971.962) 261 17/35 0:04 +0.69 1...c4+ 2.bxc4+ Ka4 3.Kc2 b3+ 4.Kb2 Kb4 5.c5 Kxc5 6.Kxb3 Kd5 7.Kc2 Kxe5 8.Kd3 Kd5 9.h4 e5 10.Ke3 e4 (1.101.964) 258 18/38 0:05 +0.85 1...c4+ 2.bxc4+ Kc5 3.h4 b3 4.Kc3 b2 5.Kxb2 Kxc4 6.Kc2 Kd4 7.Kd2 Kc4 8.hxg5 Kb4 9.gxh6 Ka3 10.g5 Ka2 11.Kc2 (1.470.561) 286 19/39 0:05 +0.80 1...c4+ 2.bxc4+ Kc5 3.h4 b3 4.Kc3 b2 5.Kxb2 Kxc4 6.Kc2 Kd4 7.Kd2 Kxe5 8.Kd3 Kd5 9.Ke3 e5 10.Kd3 e4+ 11.Ke3 Ke5 (1.699.275) 298 20/46 0:09 +0.88 1...c4+ 2.bxc4+ Kc5 3.h4 b3 4.Kc3 b2 5.Kxb2 Kxc4 6.Kc2 Kd4 7.Kd2 Kxe5 8.Ke3 Kd5 9.Kd3 e5 10.h5 e4+ 11.Ke2 Kd4 12.Kd1 Kc4 13.Ke1 Kd4 14.Kf2 e3+ (3.701.308) 398 21/46 0:13 +0.95 1...c4+ 2.bxc4+ Kc5 3.h4 b3 4.Kc3 b2 5.Kxb2 Kxc4 6.Kc2 Kd4 7.Kd2 Kxe5 8.Kd3 Kd5 9.Ke3 e5 10.Kd3 e4+ 11.Ke3 Ke5 12.h5 Kd5 13.Kd2 Kd4 14.Kd1 Ke5 (5.834.273) 438 22/50 0:20 +0.88 1...c4+ 2.bxc4+ Kc5 3.h4 b3 4.Kc3 b2 5.Kxb2 Kxc4 6.Kc2 Kd4 7.Kd2 Kxe5 8.Kd3 Kd5 9.Ke3 e5 10.Kd3 e4+ 11.Ke3 Ke5 (9.498.052) 470 22/50 0:20 +0.89++ 1...Ka5 2.Ke4 c4 3.h3 cxb3 4.Kd3 b2 5.Kc2 b3+ 6.Kxb3 b1Q+ 7.Kc3 (9.759.998) 472 22/50 0:21 +0.95 1...Ka5 2.Kc4 Kb6 3.Kd3 Kb5 4.h3 Kc6 5.Kc4 Kb6 6.Kd3 c4+ 7.Kxc4 Kc6 8.Kxb4 h5 9.gxh5 g4 10.hxg4 Kd5 (10.660.343) 488 22/50 0:24 +0.96++ 1...Kb6 2.Ke3 c4 3.bxc4 b3 4.Kd3 Ka5 5.Kd2 Kb4 6.Kd3 b2 7.Kc2 Kxc4 8.Kxb2 Kd4 9.h4 Kxe5 10.hxg5 hxg5 11.Ka3 Kd6 12.Kb2 e5 13.Kc2 e4 14.Kd2 Kd5 (12.646.984) 511 22/50 0:25 +0.96 1...Kb6 2.Ke3 c4 3.bxc4 b3 4.Kd3 b2 5.Kc2 b1Q+ 6.Kxb1 Kc5 7.h4 gxh4 8.gxh4 Kd4 9.g5 hxg5 10.hxg5 Kc5 11.g6 Kd4 12.Kb2 Ke3 13.Kc2 (12.898.258) 515 23/45 0:27 +0.95 1...Kb6 2.Ke3 Kc6 3.Ke4 Kb7 4.Ke3 Kc7 5.Kd3 h5 6.gxh5 c4+ 7.Kxc4 Kc6 (14.121.058) 516 23/47 0:33 +0.96++ 1...c4+ 2.bxc4+ Kc5 3.h4 b3 4.Kc3 b2 5.Kxb2 Kxc4 6.Kc2 Kd4 7.Kd2 Kxe5 8.Kd3 Kd5 9.Ke3 e5 10.Kd3 e4+ 11.Ke3 Ke5 12.hxg5 hxg5 13.Ke2 Kd6 14.Kd2 Kd5 (16.698.445) 496 23/50 0:39 +1.00 1...c4+ 2.bxc4+ Kc5 3.h4 b3 4.Kc3 b2 5.Kxb2 Kxc4 6.Kc2 Kd4 7.Kd2 Kxe5 8.Kd3 Kd5 9.Ke3 e5 10.Kd3 e4+ 11.Ke3 Ke5 12.hxg5 hxg5 13.Ke2 Kd6 14.Kd2 Kd5 (20.534.493) 515 24/53 0:52 +1.00 1...c4+ 2.bxc4+ Kc5 3.h4 b3 4.Kc3 b2 5.Kxb2 Kxc4 6.Kc2 Kd5 7.Kd3 Kxe5 8.Ke3 Kd5 9.Kd3 e5 10.h5 e4+ 11.Ke2 Kd4 12.Kd1 Ke5 13.Kc2 Ke6 14.Kd2 Kd5 (25.708.886) 486 24/53 0:58 +1.01++ 1...Kb6 2.Ke3 c4 3.bxc4 b3 4.Kd3 Ka5 5.c5 Kb5 6.Kc3 Kxc5 7.h4 Kd5 8.Kd3 Kxe5 9.hxg5 hxg5 10.Kc4 Kd6 11.Kc3 b2 12.Kb3 (29.651.244) 503 24/53 1:08 +1.12 1...Kb6 2.Ke3 c4 3.bxc4 b3 4.Kd3 Ka5 5.c5 Kb5 6.Kc3 Kxc5 7.Kxb3 Kd4 8.Kb4 Kxe5 9.Kc4 Ke4 10.Kc5 e5 11.Kb5 Kd4 12.h4 e4 13.Kb4 gxh4 14.Ka3 (37.276.727) 545 25/46 1:22 +1.16 1...Kb6 2.Ke3 c4 3.bxc4 b3 4.Kd3 Ka5 5.c5 Kb5 6.Kc3 Kxc5 7.Kxb3 Kd4 8.Kb4 Kxe5 9.Kc5 Ke4 10.Kd6 e5 11.h4 Kd4 12.Kd7 gxh4 13.Kc8 (46.666.175) 562 26/49 1:54 +1.40 1...Kb6 2.Ke3 c4 3.bxc4 b3 4.Kd3 Ka5 5.Kc3 Ka4 6.h4 Ka3 7.Kd4 gxh4 8.g5 hxg3 9.Kc3 hxg5 10.Kd4 g2 11.Kd3 g1Q 12.Ke4 Qg3 13.c5 b2 14.Kd4 (64.537.091) 565 27/49 2:24 +1.40 1...Kb6 2.Ke3 c4 3.bxc4 b3 4.Kd3 Ka5 5.Kc3 Ka4 6.Kb2 Kb4 7.c5 Kxc5 8.Kxb3 Kd4 9.Kb4 Kxe5 10.Kc5 Ke4 11.Kd6 e5 12.Kc5 Kf3 13.Kb4 Kxg4 14.h3+ Kxh3 (78.342.686) 543 28/53 3:52 +1.41 1...Kb6 2.Ke3 c4 3.bxc4 b3 4.Kd3 Ka5 5.Kc3 Ka4 6.Kb2 Kb4 7.c5 Kxc5 8.Kxb3 Kd4 9.h3 Kxe5 10.Kc3 Ke4 11.Kc2 Kf3 12.h4 Kxg3 13.Kd3 Kxh4 14.Kc2 Kxg4 (127.895.622) 549 28/56 5:07 +1.42++ 1...Ka5 2.Kc2 Kb6 3.Kc1 Kc6 4.Kd2 Kd5 5.Kc2 Kxe5 6.Kd3 Kd6 7.h4 Kc6 8.hxg5 hxg5 9.Ke3 Kb6 10.Ke4 c4 11.Ke5 cxb3 12.Kf6 e5 13.Ke7 (165.545.564) 538 28/56 6:25 +1.47 1...Ka5 2.Kc2 Kb6 3.Kd3 Kb5 4.h3 Ka5 5.Kd2 c4 6.bxc4 b3 7.c5 Kb5 8.Kc3 Kxc5 9.Kxb3 Kd4 10.Kb4 Kxe5 11.h4 gxh4 12.g5 hxg3 13.g6 g2 14.g7 g1Q (221.433.303) 574 29/56 8:22 +1.58 1...Ka5 2.Kd2 c4 3.bxc4 b3 4.Kc3 Ka4 5.Kb2 Kb4 6.c5 Kxc5 7.Kxb3 Kd4 8.Kc2 Ke4 9.Kd2 Kf3 10.Kd3 Kxg4 11.Kd4 h5 12.Kc5 Kf5 13.g4+ Kxg4 14.Kd6 Kf5 (283.310.480) 563 29/62 10:38 +1.59++ 1...Kc6 2.Ke3 Kd5 3.Kd3 Kxe5 4.h4 gxh4 5.Kc4 hxg3 6.Kd3 g2 7.g5 (334.049.352) 523 29/62 14:22 +1.92 1...Kc6 2.Kc4 Kb6 3.Kd3 Kb5 4.h3 Kb6 5.Ke3 Kc7 6.Kd3 Kb7 7.Ke3 Kb6 8.Kd3 Kb5 9.Ke4 c4 10.bxc4+ Kxc4 11.Ke3 b3 12.Kd2 b2 13.Kc2 Kd4 14.Kb1 Kxe5 (502.798.070) 583 30/57 18:42 +1.95 1...Kc6 2.Kc4 Kb6 3.Kd3 Kb5 4.h3 Kb6 5.Ke3 Kc7 6.Kd3 Kb7 7.Kc2 Kc6 8.Kd3 Kd5 9.h4 Kxe5 10.hxg5 hxg5 11.Kc4 Kd6 12.Kb5 e5 13.Kb6 c4 14.Kb5 cxb3 (678.333.174) 604 best move: Kb5-c6 time: 30:28.875 min n/s: 613.715 CPU 86.7% n/s(1CPU): 707.860 nodes: 1.121.258.231 TB: 776.524
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.