Download Sigma Chess 6.2

Sigma Chess is a freeware, master strength Macintosh chess program for Mac OS X.

Sigma Chess is a freeware, master strength Macintosh chess program for Mac OS X. You can play chess against the strong built-in engine (Adjust the playing strength to your own level simply by setting the ELO rating for Sigma Chess, and choose among the many playing modes, levels and styles), against the World Chess Championship strength HIARCS 13 and Deep Junior 12 engines bundled with Sigma Chess: Sigma Chess supports the UCI (Universal Chess Interface) protocol, so you can use other UCI chess engines for Mac OS X. You can also analyze and annotate games: Instruct Sigma Chess to annotate games with its analysis, or add your own free text annotations including diagrams and move suffixes. You can even write and print your own chess literature. You can maintain & access game collections/databases: The built-in database manager lets you filter and sort large game collections. Additionally you can import PGN game files that you have e.g. downloaded from the internet (see the Selected Chess Links). Sigma Chess can also be used as an engine from within ExaChess. In the end but not the final, you can customize the appearance & behavior of Sigma Chess: You can choose among the various piece sets, board types, types of move notation, colour schemes, the true perspective 3D board etc.
Operating system:
Mac OS X 10.3 or later