Mine Sweep

The game is played on a 9 * 9 (primary), 18 * 12 (intermediate), 25 * 16 (senior) arranged at random matrix of a certain amount of mines (primary to 12 , intermediate for the 31 senior as 88.) Open box one by one by the players to find out all the mines as the ultimate goal of the game. If the player opened the box there are mines, the game is over.
　　The goal of the game as soon as mine is not to find all the mines in mined areas of the box, and not allowed to step on mines. The figures point to open a few, then the number 8 position in the next several mines, if dug the mines, it will lose the game.