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Subject: Re: Clearing hash between moves

Author: Tord Romstad

Date: 12:41:34 10/24/05

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On October 24, 2005 at 14:09:30, K. Burcham wrote:

>Are there any programs that you know of, that clears hash between moves with the
>default settings?

I don't think so.  Clearing the hash table between moves is simply a very bad
idea.  It reduces the efficiency of the search and introduces some overhead
(clearing a big chunk of memory is a time-consuming operation) without any
advantages whatsoever (at least as far as I can see).

On the other hand, there are many programs (including mine) which don't
use hash entries from the previous search for pruning.  The old hash entries
are only used for move ordering.

Tord



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