goal of the game is to identify which squares have bombs hidden
under them. The bombs are placed under random squares at the beginning
of each new game.
you select a square with a bomb, you immediately lose the game.
If you select a square without a bomb, a number will be displayed.
This number indicates how many of the 8 immediately adjacent squares
contain bombs. If there are no surrounding bombs, the selected square
will appear clear.
you think a square contains a bomb, you can safely mark it with
a flag by SHIFT-clicking that square. The flag can be removed by
SHIFT-clicking the same square again.
game is won when either of the following occurs:
of the bombs have been marked by flags.
(Without any extra misplaced flags.)
of squares that do not contain bombs have been selected.