If players reveal a blank cell, all the 8 cells surrounding it are revealed. If one or more of the 8 cells is blank, it will behave like players revealed it, sometimes causing an (immediate) chain reaction. Numbered cells indicate how many mines are in the 8 cells surrounding it. If a mine is revealed, the tower will drop for a certain length and results in a miss. The game is lost if an unrevealed blank cell or numbered cell drops to the bottom.