Minesweeper is a logic puzzle played on a grid of hidden cells. Some cells contain mines, and your goal is to reveal every safe cell without detonating any mines. Click a cell to open it. If it is safe, it shows a number that tells you how many of the eight neighboring cells contain mines. Use those numbers to deduce where the mines are, right-click to flag cells you are sure are mines, and clear all safe cells to win. This post walks through the basics so you can start playing with confidence.
The Grid and the Numbers
The game board is a rectangular grid of covered cells. When you click a cell, one of three things happens. If the cell contains a mine, the game ends. If the cell is safe and has one or more mines next to it, it reveals a number from 1 to 8. That number tells you exactly how many of the cell's eight immediate neighbors hold a mine. If the cell is safe and has zero neighboring mines, it is blank, and the game automatically opens all adjacent cells to save time.
Classic difficulty levels determine the grid size and number of mines:
- Beginner: 9x9 grid with 10 mines
- Intermediate: 16x16 grid with 40 mines
- Expert: 30x16 grid with 99 mines
Minesweeper has been included with Microsoft Windows since Windows 3.1 in 1992, so many players first met it on a home computer. The same basic rules apply everywhere.
How to Flag Mines
When you are certain a cell hides a mine, mark it with a flag. On most versions, right-clicking a covered cell places a flag. A flag is a marker that prevents you from clicking that cell by accident. It also helps you keep track of mines you have identified. You can remove a flag by right-clicking again. Only flag cells you are sure of; flagging the wrong cell does not make you lose, but it can confuse your logic later. You win the game when every safe cell is revealed, no matter how many flags you placed.
Common Patterns: 1-2-1 and 1-2-2-1
Most Minesweeper puzzles are solved by recognizing patterns. Two useful patterns occur along a straight edge or wall of the grid.
The 1-2-1 Pattern
If you see three cells in a row that show the numbers 1, 2, 1, and the row runs along the edge of the uncovered area, the cells directly above (or below) the two 1s are safe, and the cell above the 2 is a mine. This pattern repeats often and saves time once you learn to spot it.
The 1-2-2-1 Pattern
A longer pattern is 1, 2, 2, 1 in a line. Here, the cells above the two 2s are mines, and the cells above the two 1s are safe. These patterns work because the numbers are counting the same set of neighboring cells. Practice them on a beginner board and you will start to see them everywhere.
Chording to Speed Up Play
Once you have flagged all the mines around a numbered cell, you can use a shortcut called chording. Chording means clicking on a satisfied number (a number whose total neighboring mines have all been flagged) to automatically open all the remaining neighbors around it. This is much faster than clicking each cell individually. For example, if a 3 has three flags around it, chord on the 3 to reveal every adjacent covered cell that is not flagged. Use chording carefully: if you flag the wrong cell, chording will open cells that might contain a mine.
When You Must Guess
Some Minesweeper boards require a guess at some point. No amount of logic can determine the last mine placement, and you have to pick a cell at random. This is a natural part of the classic game. However, some versions offer a No-Guessing mode. In No-Guessing mode, the board is generated so that it can always be solved by logic alone, with no random guesses needed. If you prefer pure deduction, look for a version that includes this option.
Where to Play
Minesweeper is widely available, but one clean option is a site that offers the classic levels plus extras. You can play Minesweeper online at minesweeper.now: it is free, requires no sign-up, and includes Beginner, Intermediate, and Expert levels, a No-Guessing mode, daily challenges, and global leaderboards. That makes it a convenient place to practice the patterns and chording techniques described here. For more resources and community tips, visit klondikesolitaire.info to find other classic game guides.