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Subject: Re: U2600 Club Dec 21 Rating List

Author: Will Singleton

Date: 19:32:43 12/21/98

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On December 21, 1998 at 21:16:31, Chris Moreton wrote:

>
>I can't decide whether I'm concerned or encouraged now by Rival's poor blitz
>performance.  It searches about 50,000 nodes per second which I had assumed was
>very slow because it is completely Object-Oriented and therefore attributed its
>poor performance to this.  Judging from the other figures posted here I think
>maybe it has nothing to do with speed but rather just that it's not very good!
>
>Chris

Chris,

I've noticed that performance is very sensitive to small changes in my program.
Very minor bugs or design errors can have a large effect.  For example, I
changed the repetition code recently to "fix" something, and also made some
other changes.  The program immediately tanked on ICC, although the wac scores
were not affected.  I found that I'd put the rep test in the wrong place,
cutting off good moves.  When I fixed it, the program started playing better
again.

So, I suggest analyzing your online games, finding the move or moves that led to
problems, and then monkey with the code to get a better move.  Not a quick
process, but analyzing online games (as opposed to test suites) has helped me.


Will




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