Author: Frank Schneider
Date: 23:18:11 05/04/99
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On May 04, 1999 at 20:51:00, James Robertson wrote: >Whenever my program makes an extension, say, at depth = 4 it finds it is in >check, it will not do any futility pruning/razoring for the rest of the branch. >I recently read that some programs will do pruning/razoring even if there is an >extension, unless it is at the current ply. Gromit is one of those programs. It uses part-ply-extensions and has lots of them, therefore there are extensions in many paths of the tree and switching off futilitypruning after an extension would result in a much larger tree. >Is this a better way to do things? >It seems like it would nullify some of the effects of extending, but it could >also save a tremendous amount of time too. What should I do? Test what works better for you. (I've never tried switching off pruning if an extension applied - I'll try that sometime). > >Thanks for any help, >James Frank
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