The idea behind minesweeper is to find all the mines in the minefield without hitting one. When a square is selected, the square will revile how many mines are next to it--including diagonals. Use this information to determine which other locations to try.
Changing to "mark-mode" will allow cells you suspect to contain a mine to be marked. This will denote there is a mine in the cell and prevent you from accidentally hitting the cell.
The game is time-based and aside from clearing the mine field, you can try to improve your times at the various difficulties.
This version of Minesweeper was written by Andrew Que
(C) Copyright 2007 by Andrew Que