Computer Chess Club Archives




Subject: Re: Verified Null-Move Pruning, ICGA 25(3)

Author: Omid David Tabibi

Date: 09:29:19 11/20/02

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On November 20, 2002 at 11:52:49, Gian-Carlo Pascutto wrote:

>My very first thought after looking through this was:
>'You note that Heinz R=2/3 appears to be superior to
>R=2 and R=3, but you don't include it in the comparison.'

Heinz reported the 10%-30% reductiong in tree size on DarkThought. This figure
will vary from program to program. In Genesis, verified algorithm constructed a
smaller tree than the adaptive one. Moreover, while the adaptive method strives
to reach the same tactical strength as standard R = 2, the presented verified
algorithm has greater average tactical strength than standard R = 2.



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