The game starts with all the numbered tiles, from 1-10, open. The player rolls two dices and then shuts tiles whose numbers add up to the total on the dice.
So if a player rolls a nine she can choose to shut the 9 tile, the 8 and 1 tiles, the 6 and 3 tiles, and so on. She can't shut the 4, 3, and 2 tiles because the 2 tile has already been shut.