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Subject: Re: Alpha-Beta fool: for Ed Schröder

Author: Ed Schröder

Date: 22:14:02 03/27/01

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On March 27, 2001 at 17:56:15, J. Wesley Cleveland wrote:

>Ed Schröder posted a few weeks ago about experimenting with a larger alpha-beta
>window at low plies to improve move ordering at greater depths. I never saw
>anything more on this. Did I miss it ?

I remember to have something posted about that some months ago. The trick
is not a wider alpha-beta window but to fool beta with some added fixed value
that forces a normal cut-off not to be taken, thus oblige the search to go for
the next move. The goal is to get a better move-ordering at deeper iterations.

You can only do this in the early iterations, say the fisrt 5-7 iterations. I
have tried all kind of variations but never found a formula that was clearly
superior to Rebel's current move ordering.

Still I think there must be something to gain from the idea.

Ed



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