This is old good and known minesweeper game. Discover all fields that don't contain bombs. Or mark all fields that do so. Touch a field to find out if there is a mine or not. A number on a field indicates how many mines is in the eight surrounding fields.

This version of minesweeper is fair. Why? Because it knows what you can know. In case your position does not allow you to find out where a bomb is the system will make its best to put the bomb elsewhere. On the other hand if you just randomly click around you can be sure to hit a bomb.

Enjoy.