Computer Chess Club Archives




Subject: Re: chess and neural networks

Author: Landon Rabern

Date: 23:03:20 07/01/03

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On July 01, 2003 at 15:50:19, Anthony Cozzie wrote:

>On July 01, 2003 at 14:21:12, Tom Kerrigan wrote:
>>On July 01, 2003 at 13:32:19, Ralph Stoesser wrote:
>>>Hello *,
>>>Why no top engine uses neural networks for positional evaluation in non-tactical
>>>situations? Are there interesting publications about neural networks and chess
>>Neural networks are for analyzing things that are
>>"fuzzy"--voice/image/handwriting recognition, etc. Chess is a very exacting
>>game. (It makes a big difference if your rook is on d1 vs. e1.) I doubt neural
>>networks will ever be useful for chess.
>The human brain is also rather "fuzzy" and it seems to play chess rather well,
>at least in some individuals :)  Neural nets aren't used for chess because they
>simply aren't as good as a human-developed evaluation function.  Humans have
>spent a lot of time trying to generate rules (to help other humans) that work
>for chess, and it isn't too hard to teach those rules to computers.  A neural
>net would abandon all that, and start over from scratch, so to speak.

I made an attempt to use a NN for determining extensions and reductions.  It was
evolved using a GA, kinda worked, but I ran out of time. to work on it at the
end of school and don't have my computer anymore. The problem is that the NN is
SLOW, even using x/(1+|x|) for activation instead of tanh(x).



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