All Threes Domino

Launch by drawing 7 domino tiles each for a two-player game. Place the first tile on the board to initiate the domino chain. Switch adding tiles to either end of the chain, checking that the matching numbers connect. Earn points by forming 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. Proceed 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.