The object of the game is to have more pieces on the board than the opponent does when the game is over. To make a move place a piece on an empty square so that one (or more) of the opponents pieces would be flanked and flipped. If a player cannot make a legal move (flip opponents pieces), the player has to pass. The game is over when either the board is full, or neither player can make a move. Improve your skills using hint, undo moves and replay.