All Threes Domino

Begin by picking 7 domino tiles each for a two-player game. Place the first tile on the board to begin the domino chain. Take turns placing tiles to either end of the chain, making sure that the same numbers touch. Score points by making multiples of 3 at the ends of the chain. Determine your score by adding the numbers on the ends of the domino chain after each move. Keep going playing until one player exhausts of tiles or no more moves are possible. Whoever with the highest score at the end wins.