Author: Steve Maughan
Date: 05:22:49 04/30/04
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Rasjid, All strong Othello programs, mine included (Edge Reversi), use regression models. This is due to the fact that Othello is close to 100% positional. Chess, on the other hand, is 99% tactics - this is the problem. When I'm not playing chess I am usually creating commercial econometric models so this is something I am know quite a bit about. IMNSHO it will be difficult to get the regression approach to overcome the tactical component of chess. What is likely to happen is the models will underestimate the value of the parameters due to tactical 'noise'. Another problem is non-linearity - multiple-LINEAR-regression cannot cope (easily) with non-linearity e.g. penalty for squares around the King controlled by the opponent; if it's one the penalty might be -0.1 but if it's eight it should be much higher than -0.8! This is one approach I was going to experiement with but I certainly don't think it is the secret sauce for m(any) commercial engines. Regards, Steve
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