Author: fca
Date: 06:24:45 08/11/98
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On August 11, 1998 at 08:30:49, Moritz Berger wrote: >On August 11, 1998 at 08:16:49, fca wrote: > >>On August 10, 1998 at 20:48:24, Jouni Uski wrote: >> >>>wKh2,Ba5,Ra2,Pg2,h3/bKh4,Qc8,Pg6,h5 >>>white to move >>>solution Rc2!! >>> >>>In my P90 Fritz5, Rebel9, Nimzo98 and CM5000 cannot find solution in 30 >>>minutes, but there's exception: Mchess 7 finds it in 8'20'' >> >>On a humble Pentium 166, i.e. barely 1/2 a cpu ( :-) ), no MMX, Chess Genius 5 >>DOS finds Rc2 in just over 2 minutes, with an evaluation of over +3. This is >>markedly better than any other result posted here so far ... and I did remember >>to turn permanent brain off before inputting the position, as I am well aware of >>CG tricks ;-) > >CG5/DOS on PII-400 (32MB hash [cg5dos/x on a 256MB machine], no permanent brain, >2player/analysis mode): > >79 seconds for Rc2 (score 3.18) This time was slightly higher than I would have expected (not enough to affect the conclusions) so I retested with a clean boot-up (i.e. no previous analyses done). Now CG5dos/x, 31Mb hash, no permanent brain, 2 player/analysis mode [mode does not make a difference in general] gives +3.18 and 168 secs, slower than the c145 secs before. I conclude some analysis mode work prior (?) to me switching permanent brain off for the formal test had left some useful unflushed material in the hash tables... :-) And with few pieces, hash would have been filling quick... 168:79 is still not that good, compared to (say) any of the benchmarks Ed uses at http://www.rebel.nl/bench.htm to compare hardware differences. For example, BT20 on R8 gives a 41:11 ratio for the hardware (i.e. nearly four times, compared to just over 2 times on Cg5). Hmmm... Best conclusion from the "freak" position anyway: Genius remains #1 at endings, and its advantage is more on old hardware. :-) >Moritz Kind regards fca
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