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Subject: Re: rebel new personality have not beat any game

Author: Shep

Date: 08:32:55 01/17/00

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On January 17, 2000 at 09:56:27, Roy Brunjes wrote:

>So, Q3 personality is in all likelihood NOT stronger than Rebel Century
>defaults, in my opinion.  I would be very surprised if it were.  Q3 DOES,
>however, provide the best/quickest solutions to the tactical problems that were
>included with the Rebel Century CD; I forget the exact name of the file that
>contains those tactical positions.

I have been experimenting with Century personalities myself a lot (though I did
not participate in the contest), and I have found that those which perform best
in the test suites I threw at them usually played very poorly in actual games.

In most cases (Q3 is a good example, I had several personalities very similar to
this one) they favour sacrifices a lot (esp. when "Attractiveness" is set high),
which is very good for most test positions, but they also tend to sacrifice just
about anything in a game, e.g. they give away a knight for a pawn without any
reason and end up losing.

It just goes to show that optimizing for test suites does not yield a really
strong program. :)
(Junior is a good example for the opposite; performs much worse on most test
suites than other top commercials, yet is one of the strongest players around.)

---
Shep



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