Begin by picking 7 domino tiles each for a two-player game. Put the first tile on the board to initiate the domino chain. Take turns attaching tiles to either end of the chain, ensuring that the same numbers touch. Gain points by forming multiples of 3 at the ends of the chain. Calculate your score by totaling 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 player with the highest score at the end is the champion.