Author: Bo Persson
Date: 09:15:05 12/13/05
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On December 13, 2005 at 04:21:47, Ryan B. wrote: >On December 13, 2005 at 04:07:56, Vasik Rajlich wrote: > >>Hello, >> >>I have gotten two reports now of Rybka 1.0 Preview losing on time with a mate on >>the board. We're looking into it, but rather than distribute a patch right away, >>we're going to target the Rybka 1.1 Early release on December 17 for the fix to >>all of these things. >> >>Until Dec 17, I suggest that resign-off games on the servers and in tournaments >>be played with the Beta version. For everything else, the Preview version should >>be better. >> >>Best regards, >>Vas > > >It looks to me like when Rybka finds mate it returns mate_value not >mate_value-height. I could be wrong as I don't know what your code looks like >but thats the impression I get. > >Ryan Yes, there are two improvements on a flat mate value. One is to give a better score for a shorter mate. The other is to continuosly improve on the value - if the last search was mate-in-4, the next search must not terminate until it finds a mate-in-3 or better. There must be one! Bo Persson
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