Author: KarinsDad
Date: 08:52:05 01/29/99
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On January 29, 1999 at 10:45:51, Albrecht Heeffer wrote: [snip] > >After the tournament I burned a CD-R with the complete directory image >of all sources, executables and log files. The version on the website >'bionic41.exe' is ftp'd directly from the CD onto the web site. It _is_ >the same version as used during both weekends of the tournament, I >can assure you. The SMP code must be very indeterministic if we can't >reproduce the moves somehow. > >Albrecht Heeffer Actually, it may be extremely deterministic, just not deterministic with the environments you are using. To reproduce the results, you may need to run on the exact same hardware and have the "opposing player" respond on each move within the exact same time frame. The number of variables in a chess program is huge. The number of variables in an SMP version of a chess program is larger. I realize that when testing most non-SMP versions of programs, that the program will often come up with the exact same move within 1 minute as it does in 5 minutes (and hence Bruce's test suite), however, an SMP version of a program may have different results. Have you examined the moves that are not corresponding with the tournament results to see if the move considered at a lesser time during the tournament is different than the actual one made and identical to the one made in the test? I am not saying that this is where the problem lies, it's just a possibility for some of the mis-matches. KarinsDad
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