Author: Uri Blass
Date: 22:48:31 12/28/05
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On December 28, 2005 at 20:51:22, Dann Corbit wrote: >On December 28, 2005 at 19:56:16, David Dahlem wrote: > >><snip> >> >>>The idea works like this: >>>Suppose that I evaluate a pawn as 100.0 centipawns. How much should a knight be >>>worth? Probably somewhere between 200 and 500 centipawns. Now, if I choose a >>>bad value (like 200 centipawns) then I should solve less problems. If I choose >>>a good value (probably fairly close to 300), then I will solve more problems. >>>So I iterate over 12,000 quiet chess positions with known solutions and see what >>>value of the parameter gives me the most solutions. >>> >>>Now, the value found will NOT be optimal for play. But it will be a good >>>starting point for experimentation. And I will also have a pretty good idea >>>about what sort of range will produce reasonable results. >>> >> >>Thanks Dann. I'm not really a fan of tuning with test suites. I just build >>several test versions with different bonus values, and run a lot of test games. >>It's time consuming, but i have more confidence in the results. :-) > >I agree that test suites are not good for game play. But they are useful to get >an idea of the general ballpark for the right value of a parameter. I do not like it. I think that I already have enough knowledge to guess the right value of a parameter without a big error and if I do a big error then I can learn from watching game of my program. I can use test suites to help me to decide about better pruning rules or to test some improvement in hash but not to help me to have better evaluation. Uri
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