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Subject: Re: Proffessional Pre-Evaluators

Author: Antonio Dieguez

Date: 14:12:44 01/21/02

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On January 21, 2002 at 17:09:33, David Rasmussen wrote:

>On January 21, 2002 at 16:00:01, Antonio Dieguez wrote:
>
>>On January 21, 2002 at 06:43:41, David Rasmussen wrote:
>>
>>>What top programs use a pre-evaluator? Specifically, does Tiger do this?
>>>
>>>/David
>>
>>what is that?
>
>It is evaluating the root position before search, and filling up piece/square
>tables etc. Then during evaluation in the tree, it doesn't have to do expensive
>evaluation, it just uses the preplanned data from the root. There can be
>problems if it isn't done right. For example you might score things as if the
>king is at g1, but 15 plies into the tree, the king might be at b1, so the
>scores are not correct. But it is just another design. It has advantages and
>drawbacks just as the normal approach.
>
>I've been thinking that not only evaluation can be done this way. You can also
>use it for detailed root position dependent extensions etc. and maybe even
>forward pruning.

hi David.

Didn't you know?? preprocessing stuff was banned from this forum.
Moderators please close this thread.



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