OCC allows to play any number of games simultaneously against your friends spread all over the world with nothing else but a simple web browser... provided you own some PHP-ready web space. OCC recognizes checkmate, stalemate and allows to draw a game. In addition, finished games will be archived. All games can be reviewed step by step.

License: free

Additional System Requirements: PHP-ready web server to set up a chess server and any (graphical) browser to play.