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Subject: Re: The need to unmake move

Author: Robert Hyatt

Date: 10:48:21 09/03/03

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On September 03, 2003 at 13:42:12, Gian-Carlo Pascutto wrote:

>On September 03, 2003 at 13:08:34, Robert Hyatt wrote:
>
>>Very close.  I also need to access some "shared" data at a split point, so that
>>I can be sure to search every move there once, but only once.  That is _very_
>>infrequent of course.  IE a typical position has 35 moves that need to be
>>searched.  A 4 ply search below that point dwarfs that overhead into nothing.
>
>I don't know about Crafty, but my speedup noticeably decreases if I only
>split at 4 ply. Normally, even splitting 2 ply searches is still beneficial.
>
>--
>GCP


Mine is tunable.  I run about 100 positions and pick the minply value that
optimizes all 100 the best.  I just checked and I am using 3 at the moment.  I
have not tested this recently.  I think 3 was the optimal value for my quad 700.

I will probably test this again on my dual to be sure that I have already done
this correctly.



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