Author: Gian-Carlo Pascutto
Date: 08:54:40 03/12/00
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On March 12, 2000 at 10:09:41, Colin Frayn wrote: >Basically, what you've described sounds like a very strong variant of futility >pruning, which basically stops the search when it's near depth of 1 or 0, the >line you're following seems to be losing a lot of material, and it doesn't look >like you're going to get it back in the near future. I've always been >sceptical of this method, and I think Bob Hyatt dislikes it too (from the >comments that come with Crafty's source code) - but note that I think Crafty >uses razoring, which is similar but less foolhardy. Robert did away with it some time ago. It's commented in crafty's main.c. I use Ernst's Extended Futility Pruning and Limited Razoring myself and I observed nice speedups with no loss of tactical stength...but each program is different... -- GCP
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