Author: Michael Fuhrmann
Date: 12:35:18 06/24/99
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On June 24, 1999 at 15:17:23, Chris Carson wrote: >On June 24, 1999 at 14:43:35, Michael Fuhrmann wrote: > >> When setting hash table size, bigger is generally better (provided there’s >>enough memory). Except for blitz, when bigger is unnecessary, right? >> So what would be an appropriate hash table setting for blitz? I’m thinking >>specifically of Crafty, but guess the same figure would be OK for other engines >>... > >I use the following rule (for Crafty and CM6K), take the Nodes Per Second >for your program (run Bench for Crafty, 180K NPS for my PII 300 for Crafty >and 20K NPS for CM6K). Determine the amount of time you will give the >computer on average. I play about 1 min per move so for Crafty I set >the hash=180K NPS * 60 sec = about 12M and hashp=3M. So in the case of, let's say, a 5 min game, when Crafty has 300 seconds to make all its moves: Should I divide 300 by 40 (average number of moves per game), to get 7.5 seconds (average time per move) and then multiply that figure by NPS? And if ponder is on, I guess the figure should be higher? > >For CM6K ttable=20K * 60 = 1.2M = I round up to 2M = 21 > >Hope that helps. Basically determine how many nodes will be evaluated >on average and set the hash tabel to be that size. Just my opinion. > >Best Regards, >Chris Carson
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