All Threes Domino

Launch by selecting 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, ensuring that the same numbers touch. Earn points by creating multiples of 3 at the ends of the chain. Calculate your score by totaling 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.