Mill Game program, which supports rule variants. Rules: * A player who aligns three of his pieces on a board line has a mill and may remove his opponent's piece(s). * Any player reduces to two pieces and has no option to form new mills and thus loses the game. * If a player cannot move one of his pieces (is locked up), he has lost the game. Features: * Support rule variants, such as Nine Men's Morris, Twelve Men's Morris, "flying" rule, or no "flying" rule. * Play against the AI, or play bo