How to play Minesweeper The grid has 15 hidden mines. The object of the game is to identify the squares that contain the mine and mark them with a right click. Left click on a square: If the square contains a mine, the game is over. Otherwise, reveals the number of mines immediately surrounding that square. For example, if the square reveals a 2, it means there are two mines in the 8 squares surrounding it. Clearing a square that has no mines around it will automatically clear adjacent squares that also have no mines surrounding them. Right click once on a square: Mark a square as a mine Right click twice on a square: Mark a square as unknown. Right click thrice on a square: Unmark a square