Rules:
1) If you can move, you must move.
2) You may move your piece one or two squares (in 'any' direction).
3) If you move one square, your piece is copied to the new location.
4) If you move two squares, your piece jumps to the new location, leaving a vacancy behind.
5) If you move adjacent to any opponent pieces, they are captured and converted into your pieces.

License: free

Additional System Requirements: pygame