Author: Andrew Williams
Date: 00:52:22 05/23/00
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On May 22, 2000 at 03:22:37, Peter McKenzie wrote: >Recently I've noticed that my program tends to overvalue pawns, so I've been >playing with reducing the pawn value. How does one test such a change? Not >easily thats for sure! > >One thing I did was play 150 games vs the old version (new version scored 56% - >yay), but I'm a little suspicious about how useful this information is. For >starters the time control was fast (2min + 2sec inc, on P133), although does >this really matter for this type of change? > >I guess I'll probably just go with the new version and keep an eye on its play >on ICC... > >cheers, >Peter Hi Peter, I used to use Nunn matches between the old and new versions to do this. But I tended to find that twenty very short games wasn't enough to say anything useful. So I incorporated a third program (gnuchess, I think) so I'd have a 3-way Nunn Tournament. I stopped doing that in favour of test sets, but I'm reasonably sure that playing these tournaments was just as useful. Andrew
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