Author: Uri Blass
Date: 00:11:49 03/28/01
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On March 28, 2001 at 01:14:02, Ed Schröder wrote: >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 I remember from your posts that you found a way to do Rebel 1% faster by this idea and I guess that at longer time control(or with faster hardware) it may be more than it. Uri
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