The game consists of two colored bricks that can be turned over to switch color. The players take turn to place bricks. A brick is placed so that it "traps" the opponents bricks between itself and another brick of its own color. Look at this example:

Here the black player has three bricks (1). White player moves, and places a brick to the left, thus trapping the black bricks between two white bricks (2). The black bricks are turned and becomes white bricks! (3)

Moves like this can be made vertically, horizontally or diagonally. A brick may only be placed where it generates a turnover. The winner is the player who has the most bricks of his own color on the board when the board is filled or when no more moves can be made.