The object of this game is to score points by placing pieces that result in there being 3, 6, or 9 pieces in a line. Each turn, each player drops a piece in any empty cell. After adding the piece to the cell, that player scores 1 point if there are exactly 3 pieces (of either player) in a horizontal, vertical, or diagonal line through that cell. If there are 6 pieces in a line through the cell the player scores 2 points, and if there are 9 pieces in a line the player scores 3 points. Points can be scored for multiple lines on a single turn. The game is over when the board is full, and the player with the highest score wins.

Either player who drops a piece in the highlighted cell will score 3 points: 2 points for creating 6 pieces in the vertical column, and 1 point for creating 3 pieces in the diagonal line that goes down and right.