All Threes Domino

Start by selecting 7 domino tiles each for a two-player game. Put the first tile on the board to initiate the domino chain. Switch adding tiles to either end of the chain, ensuring that the corresponding numbers connect. Earn points by creating multiples of 3 at the ends of the chain. Calculate your score by summing 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. Whoever with the highest score at the end claims victory.