Author: Ernst Walet
Date: 00:16:18 12/02/01
Go up one level in this thread
Fritz7.002 plays g5 right from the beginning, and sticks to it after completing 22 ply. Ernst. New game 8/3n1pkp/6p1/1P1N4/3K2P1/7P/8/8 w - - 0 1 Analysis by Fritz 7: 1.g5! +- (2.07) Depth: 11/20 00:00:00 189kN 1.g5 h6 2.Nf6 Nb8 3.h4 hxg5 4.hxg5 Kf8 5.b6 Ke7 6.Kd5 Kd8 +- (2.13) Depth: 11/22 00:00:00 240kN 1.g5 h6 2.Nf6 Nb8 3.h4 hxg5 4.hxg5 Kf8 5.b6 Ke7 6.Kd5 Kd8 7.Kd6 +- (2.25) Depth: 12/23 00:00:00 415kN 1.g5 h6 2.Nf6 Nb8 3.h4 hxg5 4.hxg5 Kf8 5.Ke4 Ke7 6.Kd5 Kd8 7.Kd6 Kc8 +- (2.00) Depth: 13/23 00:00:01 627kN, tb=7 1.g5! +- (2.29) Depth: 14/27 00:00:02 1269kN, tb=17 1.g5 f5 2.gxf6+ Kf7 3.b6 g5 4.b7 h5 5.Nb6 Nb8 6.Ke5 g4 7.Nc4 gxh3 8.Nd6+ +- (2.41) Depth: 15/27 00:00:05 3145kN, tb=47 1.g5 f5 2.Nf6 Nb6 3.Kc5 Na4+ 4.Kc6 h6 5.h4 hxg5 6.hxg5 f4 7.b6 Nxb6 8.Kxb6 +- (2.32) Depth: 16/29 00:00:12 6468kN, tb=149 1.g5 f5 2.Nf6 Nb6 3.Kc5 Na4+ 4.Kc6 Kf7 5.Nd5 Ke6 6.Nc3 Nb2 7.b6 Nd3 8.b7 +- (2.35) Depth: 17/28 00:00:21 11387kN, tb=326 1.g5 f5 2.Nf6 Nb6 3.Kc5 Na4+ 4.Kc6 Kf7 5.b6 Nxb6 6.Kxb6 h6 7.h4 Ke6 8.Kc5 +- (2.35) Depth: 18/31 00:00:39 20082kN, tb=820 1.g5 f5 2.Nf6 Nb6 3.Kc5 Na4+ 4.Kc6 Kf7 5.b6 Nxb6 6.Kxb6 f4 7.Kc5 Ke6 8.Kd4 +- (2.38) Depth: 19/33 00:01:17 40523kN, tb=1773 1.g5 f5 2.Nf6 Nb6 3.Kc5 Na4+ 4.Kc6 Kf7 5.b6 Nxb6 6.Kxb6 h6 7.h4 Ke6 8.Kc5 +- (2.35) Depth: 20/35 00:03:40 112108kN, tb=5242 1.g5 f5 2.Nf6 Nb6 3.h4 Kf7 4.Nxh7 f4 5.Nf6 Ke6 6.Ke4 Kd6 7.Kxf4 Kc5 8.Nh7 +- (2.50) Depth: 21/37 00:10:12 322582kN, tb=16479 1.g5 f5 2.Nf6 Nb6 3.h4 Kf7 4.Nxh7 f4 5.Nf6 Ke6 6.Ke4 Kd6 7.Kxf4 +- (2.66) Depth: 22/40 00:14:26 474535kN, tb=24788 (Celeron Tualatin 1,2 GHz, 832MB hash, 3,4 and 5 piece EGTB's 02.12.2001) On December 01, 2001 at 23:53:30, Peter McKenzie wrote: >I am working on an endgame test suite, and finding it surprisingly difficult to >get good test positions. It is interesting that many of the positions found in >chess books either have a dual solution, or (less common) the solution has a >mistake. > >Take the following position for example: > >[D]8/3n1pkp/6p1/1P1N4/3K2P1/7P/8/8 w - - > >Chigorin - Marshall, Karlsbad 1907 > >Chigorin played the thematic 1.g5!, which clearly wins as it prevents any black >counter-play. > >But I think that most computers will initially prefer 1.b6, and it is unclear if >this is winning or not. I think tablebases could be quite useful here, so >perhaps someone could run crafty/yace/fritz/tiger etc on it for a decent amount >of time. > >One possible attempted defence is 1.b6 f5 2.gf gf 3.b7, it might be worth >starting a search from there. > >cheers, >Peter
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