Author: Robert Hyatt
Date: 11:42:13 09/27/98
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On September 27, 1998 at 09:36:12, Jari Huikari wrote: >On September 24, 1998 at 06:19:18, Roberto Waldteufel wrote: > >>Searching captures first is indeed very beneficial for alpha-beta efficiency, >>but I think that just about all other programs also do this, as it is well >>known. By the way, you should include promotions as well, whenever there is >>one available, as these too cause a big change in material. > >(I) >What about advancing white pawn to seventh (black pawn to second) rank? >Should also be examined early? no. that's the purpose of "killers". If the pawn move turns out to be good, it will become a killer and tried early from then on anyway... and when it just tosses the pawn, it won't be a killer and won't waste time. > >(II) >HOW MANY killer-candidates your programs store? (To be tried if they cause >a cutoff.) I've always used 2 per ply. In Cray Blitz, since I didn't use the history heuristic, I also did some other killer tricks. IE try both killers for the current ply, they try the killers from ply-2, and even ply-4... > >(III) >I added random feature to Nero 4. (Explained in the end of its FAQ-file.) >Makes randomly one of the legal moves. Can OCCASIONALLY beat KASPAROV... :-) > >Latest version of Nero http://www.math.jyu.fi/~huikari/NERO4.ZIP > > Jari
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