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Subject: Re: Hash and first Fail High

Author: Gian-Carlo Pascutto

Date: 07:41:20 08/18/03

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On August 16, 2003 at 23:14:44, Robert Hyatt wrote:

>If you don't try a hash table move first, then you will probably try captures
>and captures have re-captures that work instantly.  Hence more cutoffs.  Just
>try it...

I did, and I already posted my results. So did Dieter, and so did the
original poster after running a few more positions. None of those results
suggested better 'move ordering' (FH%) with worse move ordering.

>The hash move is often _not_ a capture.  But if you try a capture first,
>then the corresponding re-capture will be an instant cutoff that is easier
>to find than a reply to a non-capture.

The reply to the noncapture will be an instant cutoff as well in most
cases, since you have a hash move in that case.

If it's a capture, and the correct reply is a noncapture, you're screwed
without hash.

--
GCP



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