Sigma Chess 6.1 is a so-called 'Carbon' application that runs natively under Mac OS X.The MultiPV (k-var) option is now available for UCI engines supporting this feature (such as the registered HIARCS 12 engine).Sigma Chess 6.1 can now host matches between UCI chess engines.

Click here for a list of UCI chess engines for Mac OS X (UCI is not supported on Mac OS 9). The World Championship strength HIARCS 12 engine is bundled with Sigma Chess.

Sigma Chess 6.1 supports the UCI (Universal Chess Interface) protocol, so you can run other Mac OS X engines in the Sigma Chess GUI.

Here are some key features of 'Sigma Chess': Sigma Chess is a master strength Macintosh chess program for both OS X and Classic Mac OS. You can choose among the various piece sets, board types, types of move notation, colour schemes, the true perspective 3D board etc. Instruct Sigma Chess to annotate games with its analysis, or add your own free text annotations including diagrams and move suffixes.Īdjust 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. It has a true perspective 3D color chess board.

Sigma Chess is one of the best free Mac chess games available to download. Homepage: Developed by: Ole Kjaer Christensen Sigma Chess - Colorful 3D chess that will challenge your mind.

Chess program for mac free