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Subject: Re: question about bonus for reducing distance between the kings in crafty

Author: Uri Blass

Date: 14:43:51 05/28/03

Go up one level in this thread


On May 28, 2003 at 17:38:48, Matthew White wrote:

>On May 28, 2003 at 16:25:27, Uri Blass wrote:
>
>>On May 28, 2003 at 14:59:57, Uri Blass wrote:
>>
>>>I am too lazy to look at the source code of crafty to try to find what
>>>formula is used by crafty for reducing the distance between the kings in
>>>endgames like KQ vs KR to help it to win without tablebases.
>>>
>>>what is the formula that is used.
>>>I decided to try something in movei and first tests suggest that it is slightly
>>>productive but I want also to know what crafty does.
>>>
>>>Uri
>>
>>Second test suggest that my code is not productive so I may try to restrict the
>>code for cases when there are no passed pawns or maybe it is better first to
>>improve king relative to passed pawn evaluation.
>>
>>Uri
>Are you referring to the opposition, or is there another reason to reduce the
>distance between kings?
>
>Matt

There is another reason.

In KQ vs KR this knowledge is needed to mate without tablebases and christophe
already said in the past that tiger has this knowledge because it is useful in
other cases when one side has material advantage.

Uri



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