Double Shutter is a two row Shut the Box game. Also called Tric Trac, this dice game incorporates the luck of the roll with strategy. Roll two dice and shut the numbers that equal your roll. You can't shut a number on the back row until you uncover it by shutting the number in front. The goal is to shut as many numbers as possible. Roll a combination that can't be shut and your turn is done. Add up the remaining open numbers from both rows as your score. Double Shutter can be played solitaire or compare your score against other players.