Author: Richard A. Fowell (fowell@netcom.com)
Date: 22:34:47 06/24/98
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On June 24, 1998 at 08:46:54, Nouveau wrote: >A simple question : > >Does anybody know something about Sigma-Chess for Mac ? It seems to be >beautiful, but what about the strength of the engine, the database features ? > >Where can I find any information on the Net ? > >Thanks. > >Jeff The easiest thing is to download the freeware version from the author's home page: http://users.cybercity.dk/~bst10651/ The freeware version has relatively few limitations compared to the commercial version - it is full strength, and save enabled. The main restrictions are: - number of visible games in a database limited to 1,000 - diagram printing from database disabled - number of endgame tablebases supplied is reduced. As far as the strength goes - pretty good: but not as strong as HIARCS 6.0 Mac. Whether Sigma Chess or MacChess 4.0 are stronger is murky - on problem tests, MacChess 4.0 did slightly better. However, the Sigma Chess author said: " Over the last few days I have played a 20 game blitz match between Sigma Chess 4.0 and MacChess 4.0 PPC on my 132 MHz PowerMac 7600. Sigma won 11 - 9." The statistical dispersion on a match with so few games is pretty wide, but Sigma Chess (written in 680X0 assembler) was at quite a handicap here, since it was running without benefit of Speed Doubler, which more than doubled its speed when I used it. Richard
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