you use your intelligence to eliminate all the chessmen. Simply click at the ball and the place you want it to go, arrange three or more atoms of same color in horizontal, vertical, or diagonal sequence to eliminate them, but remember they can only be moved through empty cells. You can see a red chessboard in the screen with yellow grids in it, there are atoms with different color in it, and click on the ball you want to move then the ball will begin to pulse. Your score will be shown on the right corner, and you can choose the level 1, 2, and 3 with different number of lattices. Enjoy yourself now.