From the review:
Double Double Dominoes is a new approach to Dominoes. Score points by matching up dominoes over key areas of the game board. Play a Double Domino and double your score! Grab bonus points every time a player matches your position on the score track with a domino played… including yourself! But be careful not to award your opponents bonus points when you play. Double Double Dominoes is an addicting new spin on a classic game; it’s where dominoes and a conventional style game board come together to provide exceptional family entertainment.