All Threes Domino

Start by drawing 7 domino tiles each for a two-player game. Place the first tile on the board to initiate the domino chain. Switch attaching tiles to either end of the chain, making sure that the corresponding numbers touch. Score 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 player with the highest score at the end wins.