Playing backgammon with dominos adds substantially to the skill needed to win. Instead of relying on the roll of the dice to decide each move, both players start with a set of twelve dominoes. At the start of each move, a player chooses one domino which he then uses as his dice roll. Having a choice of twelve greatly increases your ability to look ahead, and plan a sequence of moves. You can also see your opponent's dominos and predict what moves he will make.
To choose a domino, simply click on it with the left mouse button. Once all twelve dominos have been used by both players, a fresh set will be dealt.