Author: Ernst Walet
Date: 11:04:48 04/18/99
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On April 18, 1999 at 01:23:25, Ernst Walet wrote: > > >And CM6000 gives the following result with 8MB (and 32MB) hash: > >1:04 (1:05) 1/9 Bxe6 -4.40 >1:45 (1:45) 1/9 Rxh6 -3.24 >2:27 (2:24) 1/10 Rxh6 -0.75 >4:08 (3:46) 1/11 Rxh6 -0.75 > >so solves it in 105 sec. > >Ernst-J. > >The reason to test it with 8MB and 32MB hash is that I want to determine if The >King engine in Tascbase 2.1a suffers much from it's limitation of 8MB hash. > >So far I've found, in CM6K, on a K6-200, a penalty of 3% at 3 min., a penalty of >5% at 3 min., a penalty of 14% at 10 min., and a penalty of 17% at 30 min.. > >What penalty should I expect at a overnight analysis? I expect that the curve >flattens out at longer time controls at maybe 25% or so. Still 25% of about 8 >hours gives a total time of 10 hours. Maybe a programmer could shine a light on >this. > >What I also noticed is that The King, as far as I can tell, does not rely on the >hash table for it's evaluation. It still finds moves at the same ply depth with >the same, or about the same score with different hash sizes, only the time >differs. Trying Nolot #2 with CM6000, The result was that with 32MB the solution was found 500%! faster than with 8MB, cause it was found one ply sooner. My first perception wasn't totaly right (see above). Here the results with 8MB (and 32MB) hash: 3:04 (2:55) 1/9 Bf6 0.00 6:23 (5:43) 1/10 Bf6 0.00 x:xx (8:41) 1/10 Rxc5 2.47 (not found at ply 10 with 8MB) 44:?? (xx:xx) 1/11 Rxc5 2.48 (forgot to note the seconds in my astounishment) I think I have to settle for the 32MB CM6000, in stead of the 8MB Tascbase for deep King analysing. Kind Regards, Ernst-J. >Rebel for example sometimes finds moves at a certain ply depth in a >certain time with 60MB hash, but doesn't find it with 40MB hash at all, or much >later at much deeper ply depth. > >My conclusion sofar is that The King does not rely on hash tables for evaluation >and that Rebel does, is this right? > >Kind regards, Ernst-J.
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