Author: Uri Blass
Date: 15:09:23 09/17/04
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On September 17, 2004 at 17:49:50, Dann Corbit wrote: >On September 17, 2004 at 16:56:52, Gian-Carlo Pascutto wrote: > >>Abstract: >> >>"In this project it is examined how the use of a specific data structure called >>a bitboard affects the performance of parallel search." >> >>Conclusions: >> >>"Our experiments showed that speedup was not near ideal using many processors. >>Whether or not this was due to the use of bitboards is unclear." >> >>So, what was the goal of this research again? :) >> >>Kudos for including your source in any case - at least your results can be >>verified and further investigated, even if you didn't really manage to produce >>much useful results... > >I think everyone is being a little harsh. > >Similar to the paper by Marcel V.K., it is an interesting piece of work. It is >easy to read and understand. > >Of those people who have managed to accomplish a parallel implementation of a >chess engine (I am guessing that there are less than 10 in the world) only a few >have bothered to explain what they are doing, and only Dr. Hyatt and Mr. >Rasmussen have given out their source code. I think that there are more than 10. I can easily count more than 10 programs that use parallel search not by Rasmussen and I do not know all the programs that use parallel search. 1)Junior 2)Fritz 3)Shredder 4)Diep 5)Sos 6)Falcon 7)Sjeng 8)Amy 9)Crafty 10)Zappa 11)Storm 12)Hydra > >Writing a parallel chess engine is not trivial in the least, since it definitely >requires an understanding of multithreaded programming which is also fairly >unusual. David Omid claimed that it does not require a lot of work and I guess that I am simply too ignorant not to know the usual knowledge of programmers. I guess that the reason that most programmers did not write parallel version of their engine is simply lack of interest and most programmers know more than me. Uri
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