Author: Stuart Cracraft
Date: 14:57:55 09/04/04
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On September 03, 2004 at 16:54:42, Andrei Fortuna wrote: >P.S. : I don't believe in auto-tuning for chess programs, except for that paper >that I've seen in which they used a neural network to determine move generation >order, but for eval I just don't see how to write such a bloody thing. No, I am >in favour of manually tuning the eval and such. It requires some type of mathematics/regression/operations-research that a lot of us don't know. Perhaps a book or two on regression would help? Look at Andreas Nowatczyk of the Deep Thought team at CMU. He writes this code (now at Tim Mann's WINBOARD/XBOARD site) that helps tune the evaluation against master games. Can anyone *explain* this code publically so that it can be understood? I've looked at it and can't make heads nor tails of it. I just don't understand the math. Is it a least-squares fit? How does that work for a large number of coefficients that have to be tuned simultaneously, like in a chess program? Any thought of adding a random perturbation? I suppose this is a new threat but I am too lazy right now to start it. Stuart
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