Author: martin fierz
Date: 19:09:42 11/14/02
i was looking at eduard nemeth's page on computer chess and stumbled across the following famous position: [D]1k6/8/8/8/8/5p1p/PPP5/6K1 w - - 0 1 white is a pawn up but will lose the game. i first saw this position about 20 years ago when our coach showed it to us as kids - he let us choose which side we wanted to play, and we always wanted white of course, being materialistic :-) anyway, eduard says on his page that as long as he cared to look, fritz thought white was winning. i let fritz7 run over night on my laptop, with the result pasted below: it takes fritz over 10 hours on my old P3 450MHz to see that white is worse, and after 24 hours the score is not yet showing that white is lost. any engines do better on this? aloha martin Analysis by Fritz 7: 1.a4 Kc7 2.b4 Kc6 3.c3 Kd5 4.a5 h2+ 5.Kxh2 Kc6 6.Kg3 +- (3.91) Depth: 10/18 00:00:00 58kN 1.a4 Kc7 2.b4 Kd6 3.c4 Kc6 4.a5 +- (4.06) Depth: 11/17 00:00:00 73kN 1.a4-- +- (3.78) Depth: 12/18 00:00:00 113kN 1.a4 Kc7 2.b4 Kc6 3.b5+ Kb6 4.c4 f2+ 5.Kxf2 h2 6.Kg2 h1Q+ 7.Kxh1 +- (3.53) Depth: 12/18 00:00:00 128kN 1.a4! +- (3.81) Depth: 13/20 00:00:01 191kN 1.a4! +- (4.09) Depth: 13/20 00:00:01 207kN 1.a4 Kc7 2.b4 Kc6 3.a5 Kb5 4.c3 +- (4.13) Depth: 13/20 00:00:01 227kN 1.a4 Kc7 2.b4 Kd6 3.a5 Kc6 4.c4 +- (4.34) Depth: 14/21 00:00:02 344kN 1.a4 Kc7 2.a5 Kd6 3.b4 Kd5 4.a6 Kc6 5.b5+ +- (4.13) Depth: 15/26 00:00:03 596kN 1.a4-- +- (3.84) Depth: 16/27 00:00:05 1040kN 1.a4 +- (3.84) Depth: 16/27 00:00:06 1083kN 1.a4-- +- (3.56) Depth: 17/27 00:00:08 1464kN 1.a4 Kb7 2.a5 Ka6 3.b4 Kb5 +- (3.50) Depth: 17/28 00:00:10 1671kN 1.a4-- +- (3.22) Depth: 18/30 00:00:12 2366kN 1.a4 +- (3.22) Depth: 18/30 00:00:13 2471kN 1.a4 Kb7 2.a5 Ka6 3.b4 Kb5 +- (3.22) Depth: 19/32 00:00:17 3585kN 1.a4-- +- (2.94) Depth: 20/33 00:00:22 5058kN 1.a4 Kb7 2.a5 Ka6 3.b4 Kb5 +- (1.81) Depth: 20/33 00:00:26 6126kN 1.a4 Kb7 2.a5 Ka6 3.b4 Kb5 +- (1.66) Depth: 21/36 00:00:38 9266kN 1.a4 Kb7 2.a5 Ka6 3.b4 Kb5 +- (1.66) Depth: 22/39 00:01:02 16085kN 1.a4-- ± (1.38) Depth: 23/40 00:01:34 24793kN 1.a4 Kb7 2.a5 Ka6 3.b4 Kb5 ± (1.28) Depth: 23/42 00:02:56 51884kN 1.a4 Kb7 2.a5 Ka6 3.b4 Kb5 ± (1.25) Depth: 24/42 00:04:15 74045kN 1.a4 Kb7 2.a5 Ka6 3.b4 Kb5 ± (1.25) Depth: 25/44 00:06:46 116088kN 1.a4 Kc7 2.a5 Kb7 3.b3 Ka6 ± (1.25) Depth: 26/47 00:19:01 320992kN 1.a4-- ± (0.97) Depth: 27/49 00:38:23 644062kN 1.a4 Ka7 2.a5 Ka6 3.b4 Kb5 4.c3 Ka6 5.c4 Ka7 µ (-1.22) Depth: 27/51 10:23:09 13057728kN 1.a4-- -+ (-1.50) Depth: 28/52 10:42:25 13390390kN (Fierz, Honolulu 14.11.2002)
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