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Subject: Re: A notion about EGTB probes

Author: Dave Gomboc

Date: 01:18:58 04/17/04

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On April 16, 2004 at 16:40:49, Dann Corbit wrote:

>Why not probe memory-resident bitbase EGTB files for every non-pv node and
>Nalimov (or other advanced EGTB) probes for every pv node?
>
>If it is not a PV node, then we don't really care what the move to make is.  And
>if we get a fail high on a bitbase probe, it will get researched as a PV node
>anyway.
>
>It seems like it would cut EGTB probes to 1/30 or so of probing all the time,
>and the probes would always be where they are needed the most.
>
>Have others already tried this?

Hmm, I think what matters is your search window.  e.g. if the search window is
below the minimum tablebase win, you just need to know if the position is
winning, but once your window includes the various won-in-x scores then you want
the real value.

Dave



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