Author: Anthony Cozzie
Date: 13:23:25 08/30/04
Go up one level in this thread
On August 30, 2004 at 15:33:19, Robert Hyatt wrote: >On August 30, 2004 at 14:51:01, Uri Blass wrote: > >>On August 30, 2004 at 13:51:48, Robert Hyatt wrote: >> >>>On August 30, 2004 at 12:24:54, Volker Böhm wrote: >>> >>>>On August 30, 2004 at 10:02:54, Robert Hyatt wrote: >>>> >>>>>On August 30, 2004 at 08:30:34, Kurt Utzinger wrote: >>>>> >>>>>>On August 30, 2004 at 08:12:52, Jouni Uski wrote: >>>>>> >>>>>>>Eine FPGA-Karte untersucht momentan ca. 3 Millionen Positionen/Sekunde. 16 >>>>>>>Karten machen daher theoretisch 48 MPos/sec. (Donninger) >>>>>>> >>>>>>>Jouni >>>>>> >>>>>> If Hydra made 48 Mpos/sec this again proves (in comparison >>>>>> with the 2 Mpos/sec on Quad-Opteron server with 4 CPU's of >>>>>> Shredder) that the number of pos/sec can't be taken as a >>>>>> reliable value for the goodness of a chess program. It's >>>>>> of course simply impossible to compare apples and organes. >>>>>> Kurt [http://www.utzingerk.com] >>>>> >>>>> >>>>>Don't forget that Hydra ripped Shredder's head off. So the NPS _might_ be >>>>>significant here... >>>> >>>>Didn´t I´ve heard you saying that 10 games are not enough to draw a >>>>statistically significant conclusion on the playing strength? >>>> >>>>Greetings Volker >>> >>> >>>With two _close_ opponents, correct. But if one is seriously stronger, as hydra >>>appeared to be, 10 games is plenty. >> >>We do not know if hydra is seriously stronger. > >We have a pretty good clue that it is. It is over 10x faster, potentially, than >other programs. > >1. I first assume that the programmer / designer is no dummy. > >2. all else being "equal" 10x faster is a _serious_ advantage. > >3. the above two points translate into a signficant strength advantage. > > >> >>You cannot start by assuming that hydra is significantly stronger when this is >>the question. > >With evidence, you can. IE I can certainly assume that Crafty on an 8-way >opteron is significantly stronger than Crafty on my dual xeon. > > >> >>If you see 10-0 you can say based on the result that Hydra is significantly >>stronger but when you see 5.5-2.5 you cannot claim it based on the result and >>you only can say that you do not know if it is significantly stronger based on >>the result. >> > > >If you only look at the results, maybe or maybe not. But I watched many of the >games with Crafty analyzing. That tells you even more. Hydra is unquestionably very strong, but lets not forget that Shredder lost the first two games out of book. anthony
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