Author: Peter Kappler
Date: 18:04:40 10/05/99
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On October 05, 1999 at 16:36:59, William Bryant wrote: >When updating the history for a move that has generated a cutoff, >what value to people use. > >Do you use ply or some function of ply which means that the closer you are to >the leaves, the greater the value being used for updating? >ie: History[from][to] += ply; > >Do you use depth or some function of depth which means the closer you are to the >root, the greater the value being used for updating? >ie: History[from][to] += ply; > >Or are there other values being used. > >Thank you in advance. > >William >wbryant@ix.netcom.com Hi William, I think moves that cause a cutoff near the root should get a higher bonus, as they have been searched more deeply. In Grok, I increment the history score by 2^depth, which greatly favors moves that cause cutoffs near the root. I think I got the exponential scoring idea from an ICCA article, but I can't recall the author. --Pete
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