Using their wooden playing pieces (40 each), players race to complete 10 buildings before their opponent. Pieces are placed on the board in contact with a piece of the opposing colour. When enough pieces are in play, those on the board can be stacked atop opposing pieces, or other pieces may be brought into play. A player may complete a building building if the topmost piece is his. Can be played in teams of 2 or 3 each with an additional set.