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Subject: Re: Which parallel search method is best

Author: Robert Hyatt

Date: 07:25:15 05/09/02

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On May 08, 2002 at 20:30:16, Nolan Denson wrote:

>I was wondering which parallel search method is best. Some earlier posted the
>info for me about which crafty was the first to use SMP ... (that version was
>15.0 ) Now after looking into it the note states it uses the "PVS" algorithm
>(Principal Variation Search).  Now i know that Amy uses ABDADA as a parallel
>search algorithm. So my ??? is
>
>1. Which algorithm is Crafty using today ???

A form of PVS, which is also a form of Young Brothers Wait.  But it is not
quite either of these since PVS has a rather severe limit where all processors
search at a single node together and wait until everyone finishes before
continuing at a shallower node...



>
>2. Which algorithm is considered best???


I don't believe that a decent implementation of PVS can be beat.  From either
a theoretical or a practical point of view...



>
>3. What are some other algorithms thats are being used by some other dual
>   programs???
>
>Anyone feel free to answer.
>
>Thanks
>
>Nolan Denson



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