Author: Steve Lim
Date: 02:24:37 02/17/03
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I long time ago, I asked Bob about using Positional Learning to help solve wild7 (Chess variant on ICC). I got the same response about local maxmia issues. I believe I understand the example given... however I proposed a solution to help solve the wild7 issue. Simple increase the threshold that triggers learning to some high number (eg. MATE score). Then _only_ when it sees mate in the search will it learn. It should back up the tree with time.. I don't really see any maxima issues at all with this workaround.. albeit it will take a long long time to work. Note: I never did see crafty make progress despite playing thousands of wild7 games against itself using the above mentioned settings. Steve. On February 16, 2003 at 12:16:00, Robert Hyatt wrote: >>>This is a well-known issue, and I should add that position learning doesn't >>>claim to solve everything. It is really a defense against repeating the same >>>game multiple times which humans have been known to do. But as you notice, it >>>will not solve every kind of position, because of local maxima issues. IE >>>there are some holes you can not climb out because to do so means you first >>>have to go for a _lower_ score, to reach the valley floor and start to climb >>>up the other side... >>
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