To win a round of Minesweeper, you must click on the board every square that doesn't have a mine under it. Once you've done so, the game will be over. If you accidentally click a square that has a mine beneath it, the game will be over. You'll have the option of starting a new game or redoing the one you just played.
How to Win Mines. The way to win in Mines is to successfully pick spaces that do not contain a Mine symbol and cash out before you uncover a Mine. You can cash out at any time after a successful pick with more consecutive picks awarding a higher win value.