Minesweeper

The player is initially presented with a grid of undifferentiated squares. Some randomly selected squares, they are designated to contain mines, unknown to the player. Typically, the size of the grid and the number of mines are set in advance by the user, either by entering the numbers or selecting from defined skill levels, depending on the implementations. (In the Microsoft variant, this is limited to 30 times 24 with 667 mines.) In the game player reveale squares of the grid by clicking.  If a square containing a mine is revealed, the player will lose the game. If no mine is revealed, a digit is instead displayed in the square, indicating how many adjacent squares contain mines; if no mines are adjacent, the square becomes blank, and all adjacent squares will be recursively revealed. The player uses this information to deduce the contents of other squares, and safely reveal each square or mark the square that containing a mine. Implementations may also allow players to quickly "clear around" a revealed square once the correct number of mines have been flagged around it. The game is won when all mine-free squares are revealed, because all mines are located. The goal of the game is to uncover all the squares that do not contain mines without selectign squares that contain mines by clicking on a square with a mine underneath. The location of the mines is discovered by a process of logic. Clicking on the game board will reveal what is hidden underneath the chosen square or squares (a large number of blank squares may be revealed in one go if they are adjacent to each other). Some squares are blank but some contain numbers (1 to 8), each number being the number of mines adjacent to the uncovered square. To help avoid hitting a mine, the location of a suspected mine can be marked by flagging it by holding touch on that square. The game is won once all blank squares have been uncovered without hitting a mine, any remaining mines not identified by flags being automatically flagged. However, in the event that a game is lost and the player mistakenly flags a safe square, that square will either appear with a red X covering the mine (denoting it as safe), or just a red X (also denoting it as safe).