All Threes Domino

Begin by drawing 7 domino tiles each for a two-player game. Put the first tile on the board to start the domino chain. Switch placing tiles to either end of the chain, making sure that the matching numbers touch. Gain points by making multiples of 3 at the ends of the chain. Figure out your score by adding the numbers on the ends of the domino chain after each move. Proceed playing until one player exhausts of tiles or no more moves are possible. The one with the highest score at the end claims victory.