Author: Mogens Larsen
Date: 14:17:10 06/23/01
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On June 23, 2001 at 16:45:03, Chris Carson wrote: >I think I understand what you mean, but I am not sure. Do you mean by "nuances" >the ability of the engine instead of the ability to the entire program package? >I would agree that an engine with no database support is a lot weaker. If you >include learning databases (created from only engine play) then it would take a >lot of games to move back into the 2500+ ratings range (but it would be possible >if enough games are played). That would be one "nuance" to consider. There's essentially nothing wrong with trying to prove that a complete package is of GM strength. But is this package playing computer chess or advanced chess due to the major contribution by GMs and Nalimov? The answer isn't straigtforward IMO even though some may disagree, because it's all created by humans nonetheless. Even so, I believe there's a cognitive difference between creating an engine that retrieves external knowledge by itself and adding external sources. Mainly, because it affects the development of the engine, ie. less need for investing time in opening and endgame knowledge. If there was effective middlegame databases they would be used indiscriminately. I don't particularly like that idea. >My program "Dallas" has a very simple eval with very fast searching (mostly >written in assembly) and builds a learning database from playing games and it's >analysis of games, it updates the opening book, middle and endgame knowledge >databases during this period. This means that changing the engine may make the >existing database mostly worthless, but Dallas has captured a lot of knowledge >this way, knowledg that I did not have to program into it, thus reducing engine >changes to bug fixes for the most part. Anyway, I digress. :) That illustrates some of the possibilities. Another is TD (temporal differences I think) used in EXchess, where piece values and other parameters are adjusted from game to game. Combine with learning databases and you have something interesting IMO. Regards, Mogens
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