The rules of the game are as follows:

The game board has 8x8 squares (initially, all represented by question marks). There are 8 diamonds hidden on the board, each diamond behind one of the squares. When the user clicks on a square, If the square was hiding a diamond, the diamond appears. Otherwise, the square is opened, and blank. The game ends when all diamonds are found. The user's score is the number of squares still left unturned.