All Threes Domino

Begin by picking 7 domino tiles each for a two-player game. Place the first tile on the board to initiate the domino chain. Alternate adding tiles to either end of the chain, ensuring that the corresponding numbers meet. Earn points by making multiples of 3 at the ends of the chain. Calculate your score by adding the numbers on the ends of the domino chain after each move. Proceed playing until one player runs out of tiles or no more moves are possible. The one with the highest score at the end is the champion.