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Subject: Re: Question: Null move while searching the pv

Author: Robert Hyatt

Date: 07:09:32 10/16/99

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On October 16, 1999 at 02:48:34, William Bryant wrote:

>When you start a new iteration, and search the pv to the new depth, is it
>better to allow null moves -- or not allow them until after the pv has been
>searched.
>
>Brief testing doesn't seem to show a difference.

I do null-move _everywhere_.



>
>My guess is, that since the PV is the best line returned from the previous
>depth,
>it would seem better to search this line completely, (not try to cut off with
>a null move until the search of these moves is complete).


you are overlooking (assuming you are using PVS) that even along the PV,
there are _many_ branches that are futile.  Null-move will dismiss these
lines much quicker.




>
>Any help would be appreciated.
>
>William
>wbryant@ix.netcom.com



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