Game: Black and White alternate moves, each move consisting of using a piece of its own color to displace a vertically or horizontally adjacent piece of the other color. The game ends when there remain no permissible moves. To make a move: Move mouse pointer to "clobberer", press and hold button, Move mouse pointer to desired square ("clobberee") and release button. Red dot indicates selection.To undo a move: Click the 'Back' button. Auto mode: Computer plays black;computer moves indicated by blue dot and on status line.