Gambit 

Gambit is a Mac OS X application for chess play and analysis. It allows games to be played against the chess engine "Crafty," and it allows completed chess games to be recorded, replayed, annotated, and analyzed.

Gambit uses and is 100% compatible with the PGN (Portable Game Notation) format standard. Support for game annotation includes standard punctuation and evaluation glyphs, variations (and sub-variations), and text comments. Not only does Gambit read, display, and save all of the standard PGN tag-value pairs, it retains non-standard pairs when a game with any is modified and What's New

Version 1.0.1:

- French localization and documentation

- Improved movement of pieces while Crafty is analyzing Requirements

PPC, Mac OS X 10.3 or later