Author: Jonas Cohonas
Date: 13:21:04 12/10/01
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On December 10, 2001 at 13:07:26, Y A Tham wrote: >On December 10, 2001 at 09:57:50, Jonas Cohonas wrote: > >>On December 10, 2001 at 08:50:35, Randy Schmidt wrote: >> >>>Correction: I mean 15.3 ply of course. >>> >>>Also: I just did a search on Deep Fritz and I am reading some comments that DF >>>is not always using the second processor? I do not mean to restir what I >>>imagine was a hornet's nest. I will restate the question then using Shredder >>>vs. Deep Shredder, Deep Junior vs. Junior etc. >>> >>>I am just wondering if it is worth a few 100 dollars to go with a dual setup is >>>all! >> >>To me it was not really a question of strenght, when i bought my Dual MP 1600+, >>but a question of actually being able to run SMP programs the way they were >>meant to, also to have engine tournaments with ponder=on, analysis with 2 >>engines simultaniously and a few other non chess related reasons. >> >>I am at the moment running a Gauntlet with Deep Junior 7, where it uses 1 >>processor and ponder=on, after that i will run the gauntlet over again, but with >>DJ7 using 2 processors and ponder=off, mainly to see if it will do much better >>or just a little bit better. >> >>It is true that DF not only refuses to use the 2nd processor, but sometimes even >>get's slower with 2 processors than with one!! i have stopped using it all >>together as SMP. >> >>Regards >>Jonas > >Hi Jonas > >I am curious to find out the differences between ponder on and ponder off. >In your tournaments; does the engine rankings and ELO spread change when >ponder is turned on or off (ie. dual or single CPU)? >How much is the ELO spread differences if any? > >Regards >Art I have not run enough matches to make any conclusion as to wether ponder=on or ponder=off will favour some engines. I am however trying to find out how much DJ7 will benefit from 2 processors, by running a gauntlet against the best engines available. First run through DJ7 will only use 1 processor with ponder=on and the second run through will see DJ7 using 2 processors with ponder=off. I would say that engines that need longer time controls in general, to show it's full potential, would probably be the engines that could gain from ponder=on matches. Regards Jonas
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