Author: Steve Maughan
Date: 05:11:49 05/20/01
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Christophe, >I think we are already beginning to experience the effects of dimishing returns >in chess on current hardware at long time controls. This seems intuatively correct but has anyone done any experiments? I thought I saw that someone had done some experiments that looked at the best move at the start of each ply and recorded the probability distribution that it would change as a function of the ply. If there really is diminishing marginal returns then the probability of a change at the root of the PV should decline as the plys increase. From my memory the experiment said that they found that the probablility was *independent* of the ply i.e. no diminishing marginal returns. Maybe it was an experiment with a Checkers program - I'm not sure. You have to agree that for years (twelve?) people have been talking about how the "doubling of speed increases strength by x ELO" and how it's "just" started to break down. Anyway food for thought. Regards, Steve
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