Author: Ed Schröder
Date: 11:16:51 07/19/99
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>Posted by blass uri on July 19, 1999 at 07:30:56: > >In Reply to: Future Rebel will allow significant user parameter adjustment >posted by Dave Gomboc on July 19, 1999 at 03:38:30: > > >On July 19, 1999 at 03:38:30, Dave Gomboc wrote: > >>I just had hopped over to Ed's website (www.rebel.com) because I haven't been >>there in a while. He has a new thing in the top-right corner with many >>positions, and how Rebel's play is affected when tweaking a parameter (chess >>knowledge, pawn structure, king safety, "attractiveness" (I think he means >king >>tropism), level of search extensions, et cetera. Somewhere else at the >site, it >>indicates that in the future there will be a contest to see who can come >up with >>the best settings for Rebel, including cash prizes! There will also be >defaults >>adjusted settings for various GMs, similar to Chessmaster. Cool! >> >>What I am wondering right now is... how the heck is Ed is going to be able to >>decide which set of adjusted settings are the best? :-) > >He is not going to know it. > >programs use many numbers in the evaluation function and it is practically >impossible to know the right numbers(for example we cannot know which value >out of many numbers like 3,3.01,3.02 or 2.99 is the best value for a knight). > >remember that the problem is not to get the right value of one number but >to get the right value of hundreds or thousands numbers. This is way too pessimistic. Tuning the engine might be the most difficult part of the job but with common sense and good test- positions you come very close to the best settings. Next, by just playing a lot of games with a narrow (pre-defined) book it is possible to check if a given parameter is wrong or right. Ed Schroder >Uri
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