Author: Uri Blass
Date: 14:14:48 04/11/02
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On April 11, 2002 at 16:47:57, Robert Hyatt wrote: >On April 11, 2002 at 15:59:18, Uri Blass wrote: > >> >>The fact that they change their mind to Kh1 after enough time is a proof that >>they know enough. >>I believe that even crafty knows enough to prefer Kh1 after enough time. > >As the author, I can absolutely guarantee you it doesn't "know enough". > >If you want, I will be happy to post a simple position where most programs >will play the right move for the wrong reason. And then find another similar >position where the wrong move is played for that same wrong reason. > >This is about search. Not about knowledge... > > >> >>knowing enough does not mean knowing that Qe3 is a draw but knowing that the >>endgame after Kh1 is better than the position after Qe3. >> >>knowledge in evaluation does not mean knowing the final result of every position >>but knowing better to evaluate which option is better. > > >The only straw in the ointment is that "better" here is only discernable >after a horrendously deep search to follow all the checks. If you are sure >the checks are tolerable, Kf1 is fine to play. Move one pawn in the indicated >position and Kf1 is perfectly ok. So there is no "positional reason" to prefer >one over the other. There is definitely a very deep tactical reason, however... > > > > > > > >> >>The knoweldge in the evaluation that programs have is enough to evaluate that >>the position many plies after Qe3 is relatively better for black than the >>position many plies after Kh1. >> >>Uri > > >And you trust those evaluations? And you trust making a move because the >static evaluation says one thing even though the search doesn't see a thing >about what is _really_ going on? The search can see that white gets 2 pawns for the bishop. The evaluation can see that losing a bishop for 2 pawns is better than what happens after Kh1 when black is losing 2 pawns. Uri
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