Author: Russell Reagan
Date: 15:36:56 01/07/05
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On January 07, 2005 at 13:07:03, Ingo Bauer wrote: >Hello > >In case you are still amazed why the engines do different moves in differnt GUI >do the following test: > >Two engines with a fixed balanced opening position (no books). Now start a 20 >Game match in the same GUI (choose one) with the same position and the same >color for each engine, of course learning should be switched off and the time >for each game should not be too short (eg. 15 min each side) > >You will see that you do not get 20 identical games. Not all moves are allways >reproducable, most chess engines are not deterministic and it is gettiing worse >if you use dual engines. > >Bye >Ingo If there are nondeterministic single-cpu chess engines, then maybe a better test for GUIs would be to use simple, open source engines. Do you think a simple, open source engine such as TSCP is more likely to be deterministic? Or does the issue of time cause undeterministic behavior no matter what? i.e. maybe a background process (system process, firewall, antivirus, etc.) randomly takes enough CPU time away from a chess engine to cause nondeterministic behavior?
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