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Subject: Re: evaluation tuning tricks

Author: Tord Romstad

Date: 06:52:27 03/17/04

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On March 17, 2004 at 04:58:06, Peter Alloysius wrote:

>what are tricks for evaluation tuning so that it could
>search less nodes?

An easy way to reduce your tree size enormously is to evaluate all
positions to the value 0.  You will get beta cutoffs at the first move
everywhere in the tree, therefore the tree will be extremely small.  Your
move ordering will always be perfect, and the simple evaluation function
will certainly boost your nodes/second count.  :-)

Seriously, I don't think tuning the evaluation is the right way to go
in order to reduce the tree size.  You should rather concentrate on
making the evaluation function as accurate as possible, and look for
improvements in your search and move ordering when trying to reduce the
size of your tree.

Tord



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