Author: Robert Hyatt
Date: 18:11:59 05/24/02
Go up one level in this thread
On May 24, 2002 at 18:14:57, J. Wesley Cleveland wrote: > I was looking at the source of crafty and saw that on a fail low, the value >returned is alpha, rather than Max of all the values from the level below. Is >there some disadvantage in returning the real upper bound? I think it causes >some problems in Crafty making it much slower resolving fail-highs and fail-lows >at the root as these branches all need to be re-searched. I don't think it matters, personally. With mtd(f) it is critical to do fail-soft, and in fact, crafty _can_ return scores < alpha or > beta due to my testing mtd(f) a few years ago...
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