Computer Chess Club Archives




Subject: Re: When to do a null move search - an experiment

Author: Tord Romstad

Date: 08:10:30 04/26/04

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On April 26, 2004 at 09:00:52, Mikael Bäckman wrote:

>Interesting experiments. I have two questions.
>What was the CPU / time control for the games?

3 1

>Have you tried a version which has another criteria for not nullmoving: If the
>current position has been searched before (you need a hashlookup) and it failed
>low, and the score of that search is lower than our current beta, it is likely
>that we don't get a nullmove cutoff.

Yes, I do something like this in addition to the other conditions.


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