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Subject: Re: Yet Another Null move question...

Author: Robert Hyatt

Date: 18:45:52 12/21/00

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On December 21, 2000 at 21:29:02, Dann Corbit wrote:

>Has anyone tried this:
>
>Exhaustive search (NO Null move pruning) out to some arbitrary ply from the root
>{e.g. ply 5} and then increasingly aggressive Null move pruning forward from
>there [perhaps with a linear increase in aggressiveness out to some level]
>?


I do something similar.  In endgames where there is less than a queen, but
one side still has pieces, I don't do null move for the first N plies of
the search.

I also do a graduated null-move search, where R=3 for positions near the root,
and R=2 for positions near the leaf positions.  I think doing the inverse is
wrong, as you will hide too much by letting null-move collapse the last few
plies into a simple quiescence search...



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