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Subject: Re: Several chess programming questions

Author: Dan Homan

Date: 06:00:34 04/07/00

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On April 07, 2000 at 04:14:39, Tom Kerrigan wrote:

>
>> 3) does "razoring" mean pruning in general (or even alfa-beta method)?
>
>No, razoring is when you do futility pruning at the last ply of your full-width
>search. I think most people don't like it. I tried it and all my test suite
>scores went way down, even when the futility threshold was pretty conservative.
>It just causes to the search to miss too much...

I thought that was called "extended futility pruning" and razoring was
simply reducing the depth of the search by 1 ply if nothing interesting
was going on near the leaf and the move made does not bring the score
near alpha.

 - Dan

>
>-Tom



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