Players take turns dropping numbered tiles down one of the seven columns. The objective is to be the first to place tiles adjacent to each other (vertically, horizontally, or diagonally) so that the sum of the numbers on the tiles is 7.Tiles with the number '3' can only be placed in spots with a red border, so there is some positioning that takes place to try to force your opponent into making moves that allow you to place your '3' tiles. - BoardGameGeek