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Subject: Re: Endgame (EGTB) study with castling

Author: Guido

Date: 01:52:46 11/11/01

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On November 10, 2001 at 10:04:39, Robert Hyatt wrote:

....
>
>NO.  You are still missing the key case.  Is an EP possible in the future,
>not just right now?  But what about positions where white has a pawn on e2,
>and black has a pawn on d7.  Any mate-in-N will be wrong if your generator
>didn't do any EP captures, because there will be many positions where an
>EP will be possible _somewhere in the future_.  And yet your generator produced
>scores think that if it gets the black pawn to d4 and white plays e4, that black
>can't take the white pawn.  That greatly changes the position.  And means any
>analysis based on positions where EP is _ever_ possible will be wrong.
>

Thank you very much for your explanation.
I'll try to make comparisons between results of Nalimov's and my EGTBs in kpkp
ending for example.
Probably Nalimov's solution is the only practically possible, also if it
requests more RAM and some complications in the positions evaluation.

Guido





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