Author: blass uri
Date: 08:44:44 04/03/00
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On April 03, 2000 at 10:54:21, KarinsDad wrote: >On April 03, 2000 at 06:10:21, Jeremiah Penery wrote: > >>There is a problem with tablebases. >> >>No, they don't produce wrong answers. And no, they don't make engines play >>weaker. The problem is that engines would rather be -9 and not in TBs than see >>mate against itself and be in TBs. I have one good example, from a game my >>modified Crafty played on ICC, and I may try to find it, if possible. But I do >>remember what happened: >> >>I had something like a knight and a pawn, and my opponent had 2 knights and a >>pawn, about to promote. I had the choice to let him promote, and have a score >>of about -9. I would easily lose. My other choice was to sacrifice my knight >>for his pawn, and enter a lost KNNKP endgame, somewhere around Mate in 75. I >>would not easily lose this, unless my opponent had the TB, in which case it >>could be a draw by 50-moves. > > >Excuse me, but what am I missing? > >Isn't a KNNKP ending almost always a draw (assuming nothing special) if the side >with the pawn wants it to be? Cannot the side with the pawn force the draw >(regardless of 50 move rule) since KNNK is a draw? No The side with the two knight can sometimes win against a pawn because the side with the 2 knights can avoid stalemate when there is a pawn because the pawn can move and cannot avoid stalemate if he use the same plan when there is no pawn. Uri
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