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Subject: Re: Tablebases Too slow what can be improved?

Author: Robert Hyatt

Date: 13:25:58 11/07/01

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On November 06, 2001 at 23:47:28, Joshua Lee wrote:

>Fritz GUI seems to set probing (Hash Table Depth) as early as the 3rd ply
>this is with Crafty, fritz , hiarcs etc. I did notice that if i clear the
>hashtables and restart analysis that it would slow but not as much so I hope in
>the future programmers set their engines up to clear the hashtables after every
>move , atleast when running a test set....


It isn't how "early" you probe... It is how "deep" that controls the overall
speed.  Crafty will probe starting at ply=2 regardless of what the chessbase
gui says, because this isn't controllable directly.  It will never probe in
the q-search, and it won't probe in the last few plies if the search has
extended significantly.  All to keep the overhead down.



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