Labels:text | screenshot | font OCR: This is a marked mine | This is a covered square If you see these then you are dead! :- An unmarked mine This square was marked but does NOT contain a mine Here is a very simple example of mine detection: If you look at the "1"s on the left, you can deduce that 11211 the left most square is a mine, as it is the ONLY square within three of the "1"s area. 1 11211 So the middle square CANNOT be a mine.