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Subject: Re: Opinions requested -- what to do when qsearch ends in checkmate...

Author: Vincent Diepeveen

Date: 10:32:52 07/27/03

Go up one level in this thread


On July 26, 2003 at 05:54:28, Bo Persson wrote:

>On July 26, 2003 at 05:09:46, Tony Werten wrote:
>
>>On July 25, 2003 at 02:41:22, Dann Corbit wrote:
>>
>>>Now, a qsearch ending in checkmate may or may not really be a checkmate. After
>>>all, we only tried certain moves and it could very well be that the checkmate
>>>could be avoided.
>>>
>>>So, the burning question is...
>>>What should we do when the qsearch ends in a mate?
>>>There are lots of alternatives, from the primitive "return a mate" to "send a
>>>danger signal up the tree and let the regular search deal with it" to
>>>"extending" to...
>>>
>>>What is your favorite choice and why?
>>
>>Depends.
>>
>>If you sarched all legal moves, you can return checkmate.
>>
>>If you are the side who gives checkmate, you can return checkmate.
>>
>>So only if you are being checkmated, and you did not try all legal moves, you
>>return eval.
>
>
>But how much do you trust the eval in a mate position?
>
>Bo Persson

What's all this postings Bo, if you're mated why not return mate?

Way cheaper than expensive eval!

>bop2@telia.com
>
>
>
>>
>>Tony



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