Author: Steffen Jakob
Date: 10:12:57 07/09/01
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On July 09, 2001 at 12:50:01, Bruce Moreland wrote: >On July 09, 2001 at 03:46:18, Bas Hamstra wrote: > >>In my case I ignore this problem and I am not aware of any problems and simply >>store MATE-Ply. My PV's practically always show a correct path to mate. Probably >>less of a problem when you don't use an aspiration window at the root? How >>serious is this problem anyway? >> >>Best regards, >>Bas. > >I don't think it will ever cost you a half-point, but it's ugly to see the mate >values change. It's a bad problem if you use endgame databases at the tips. I once had a bug with storing mate scores which caused the following problem: The score which was backuped to the root was *bigger* than V_MATE! Something like "you have been mated some moves ago" :-) So Hossa tried to make the aspiration windows wider and started to re-search. Unfortunately the widest windows was -V_MATE..+V_MATE and therefore Hossa ran into an endless loop. Greetings, Steffen.
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