: Sigma Chess is a master strength Macintosh chess program for both OS X and Classic Mac OS. The feature set includes: Optional HIARCS engine, UCI Engine support, Databases, PGN/EPD, basic desktop publishing, endgame databases, novice levels, a true perspective 3D board, ExaChess compatibility and much more. You can:-Play chess against the strong built-in engine.-Play chess against the World Chess Championship strength HIARCS 12 engine bundled with Sigma Chess.-Analyze and annotate games.-Maintain & access game collections/databases.-Customize the appearance & behavior of Sigma Chess.Sigma Chess 6.1 Lite, which is freeware .Certain high-end features are either disabled or limited in this free version. Nevertheless, it`s a complete, full strength chess program with many features; it`s not just a demo. If you`re a casual chess player without the need for special features, chances are that Sigma Chess 6.1 Lite will do just fine.
