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Subject: Re: not using nullmove?

Author: martin fierz

Date: 05:19:28 02/17/04

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On February 17, 2004 at 07:55:32, Tord Romstad wrote:

>On February 17, 2004 at 05:44:12, Uri Blass wrote:
>
>>I hope to get a significant progress in the next week(otherwise I will probably
>>not complete that task and start implement not perfect knowledge about more
>>complicated simple endgames like KQ vs KP or KR vs KP or KRP vs KR or KB vs KP
>>or KRN vs KR).
>
>KR vs KP is a difficult one.  Does anybody have any good suggestions about
>how to evaluate it?  At the moment I don't have any specific code for this
>endgame at all, and Gothmog almost always evaluates it as a win for the rook.
>In reality, it is of course very often a draw.
>
>Tord

i'll have to think about this one too. i haven't done either KR-KP or KQ-KP;
KQ-KP should be rather easy as there are basically only two drawing positions;
KR-KP is much harder. but you should at least be able to easily identify many
cases where KR is clearly winning; e.g. any time the KR-side king is in the
square of the pawn KR is winning (with one exception: wKe2, bPd2, bKf1/f2, black
to move, but qsearch should catch that).

cheers
 martin




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