All Threes Domino

Launch by drawing 7 domino tiles each for a two-player game. Put the first tile on the board to initiate the domino chain. Alternate attaching tiles to either end of the chain, checking that the same numbers touch. Score points by creating 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. Keep going playing until one player has no more of tiles or no more moves are possible. The one with the highest score at the end wins.