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Subject: Re: Dual Processors vs Athlon 1.33

Author: Robert Hyatt

Date: 20:31:06 04/18/01

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On April 18, 2001 at 08:38:09, Jeremiah Penery wrote:

>On April 18, 2001 at 05:37:49, Vincent Diepeveen wrote:
>
>>Also i'm splitting hardly near the leaves where all recursive programs
>>keep on splitting near the leaves. That's the b.f. difference!
>
>Is this implying that Diep is using an iterated rather than a recursive search?
>I find that pretty interesting. :)  I guess there would be good points for it,
>especially with parallelism, but it is harder to implement than a recursive
>search...


The Cray Blitz algorithm is easier to implement with an iterated search, but
it is not essential to make it work.  The problem is that we want to look at
_all_ nodes in the current tree, and pick the best place to split.  This can
be done pretty easily in an iterated search.  But it can be done with a
recursive search.  I've just never wanted to introduce the extra complexity
into crafty (yet).  But it is definitely doable since even though I am at
ply 18 in the current tree, I can still set things up and start a process
to helping me at ply=4 if I want to...




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