Author: Will Singleton
Date: 23:51:34 12/01/01
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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 I don't think it's a good test position, because either move wins. b6 f5 g5! or g5 f5 gf. (is that correct notation for ep?) Will
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