All Threes Domino

Start by picking 7 domino tiles each for a two-player game. Put the first tile on the board to begin the domino chain. Take turns attaching tiles to either end of the chain, checking that the matching numbers meet. Earn points by making multiples of 3 at the ends of the chain. Determine your score by summing the numbers on the ends of the domino chain after each move. Proceed playing until one player exhausts of tiles or no more moves are possible. The player with the highest score at the end claims victory.