Author: John Merlino
Date: 18:16:40 06/03/05
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On June 03, 2005 at 19:00:30, Christos Gitsis wrote: >This is from one of my tournament games. > >[D] R7/6k1/P7/6pp/8/r6P/5PK1/8 w - - 1 42 > >My opponent, playing White, set a trap for me in this position with his last >move 42.h4. > >After 42...gxh4? white wins with a7 and f2-f4-f5-f6+: >If then ...Kf7 white plays Rh8 Rxa7 Rh7+ followed by Rxa7. >If ...Kxf6 Rf8+ wins. > >I suppose this is too deep for the engines, while an expert human player should >avoid the trap. > >After 42...g4 the position is equal. > >Is there an engine that plays 42...g4? Not quite so easy for The King. CM9_R1 needs 0:33 on an AMD 2500 to switch to g4: Time Depth Score Positions Moves 0:00 1/5 1.03 7702 42.f3 Kf7 43.Kg3 Ke7 44.Ra7+ Kd6 45.Rg7 Rxa6 46.Rxg5 0:00 1/5 1.06 11919 42.Ra7+ Kf6 43.Kh2 Kg6 44.f3 Ra2+ 45.Kg1 Kf5 0:00 1/6 0.82 17931 42.Ra7+ Kf6 43.f3 Ra4 44.Kf2 Ke6 45.Ke3 Kd5 0:00 1/6 1.00 24347 42.f3 Kf6 43.Kg3 Ke6 44.Rg8 h4+ 45.Kg4 Rxa6 46.Kxg5 0:00 1/7 0.94 56577 42.f3 Kf7 43.Kg3 Ra4 44.Kf2 Ke7 45.Ra7+ Kd6 46.Rg7 Rxa6 47.Rxg5 0:00 1/8 0.90 105017 42.f3 Kf7 43.Ra7+ Kf6 44.h4 gxh4 45.Kh3 Ke6 46.Kxh4 0:01 1/8 0.98 133395 42.Kh2 Kf6 43.a7 Kg7 44.Kg2 Ra4 45.Kg3 Kf7 46.f3 ---- ---- ---- ---- ---- 0:00 1/3 0.73 778 42...gxh4 43.f4 h3+ 44.Kh2 Kf6 0:00 1/4 0.68 2029 42...gxh4 43.f4 Ra1 44.Ra7+ Kf6 0:00 1/5 0.67 7856 42...gxh4 43.f3 Kf6 44.Kh3 Rxf3+ 45.Kxh4 0:00 1/6 0.58 17174 42...gxh4 43.Kh2 Kf6 44.f3 Ke7 45.Ra7+ Kd6 0:00 1/7 0.66 38174 42...gxh4 43.Kh2 Kf6 44.a7 Kg7 45.f4 Kf7 46.f5 0:00 1/8 0.56 87568 42...gxh4 43.Kh2 Kf7 44.a7 Kg7 45.f3 Ra1 46.Kh3 0:00 2/9 0.71 136670 42...gxh4 43.Kh2 Kf7 44.a7 Kg7 45.f3 Kh7 46.f4 Kg7 47.f5 0:00 3/10 0.64 235333 42...gxh4 43.Kh2 Kf7 44.a7 Kg7 45.f4 Kf7 46.f5 Ra1 47.Kh3 Kf6 0:01 4/11 0.71 459203 42...gxh4 43.Kh2 Kf7 44.a7 Kg7 45.f4 Ra1 46.Kh3 Rh1+ 47.Kg2 Ra1 48.Kh2 Ra3 49.f5 0:03 5/12 0.77 1223623 42...gxh4 43.f4 Kf6 44.a7 Kg7 45.f5 Ra1 46.f6+ Kf7 47.Rh8 Ra2+ 48.Kh3 Ra3+ 49.Kxh4 Ra4+ 50.Kg5 Ra5+ 51.Kf4 Rxa7 0:06 6/13 0.77 2138949 42...gxh4 43.f4 Kf6 44.a7 Kg7 45.f5 Ra1 46.f6+ Kf7 47.Rh8 Ra2+ 48.Kh3 Ra3+ 49.Kxh4 Ra4+ 50.Kg5 Ra5+ 51.Kf4 Rxa7 0:22 7/14 2.59 8233373 42...gxh4 43.a7 Ra1 44.f4 Ra3 45.f5 h3+ 46.Kh2 Ra2+ 47.Kxh3 Ra3+ 48.Kh4 Ra4+ 49.Kxh5 Ra5 50.Kg4 Kf7 51.Kg5 Ra6 0:33 7/14 0.98 12218422 42...g4 43.Kf1 Ra2 44.Ra7+ Kf6 45.Kg2 Ra3 46.Kh2 Ra2 47.Kg3 Ra3+ 48.Kg2 Kf5 49.Kf1 Ke6 50.Rh7 Rxa6 51.Rxh5 0:54 8/15 0.98 19877643 42...g4 43.Kf1 Ra2 44.Kg1 Kf6 45.Kg2 Ra3 46.Kh2 Kg6 47.Kg1 Kf6 48.Rh8 Kg6 49.Rg8+ Kh6 50.Ra8 Kg6 1:23 9/16 0.98 31371388 42...g4 43.Kf1 Ra2 44.Kg1 Kf6 45.Kg2 Ra3 46.Kh2 Kg6 47.Ra7 Kf6 48.Kg2 Kf5 49.Kf1 Ke6 50.Rh7 Rxa6 51.Rxh5 jm
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