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Minesweeper is a single-player logic puzzle played on a rectangular grid of hidden cells. Some cells contain mines; the rest are safe. Your job is to reveal every safe cell without ever clicking a mine. Each time you reveal a safe cell, it shows a number indicating how many mines are adjacent to it (touching it horizontally, vertically, or diagonally), or it is blank, meaning no neighbors are mined. Blank cells automatically cascade open all of their blank neighbors, often revealing a large area in one click.
The goal is pure deduction. By comparing the numbers around the edges of revealed regions, you can deduce with certainty which specific hidden cells must be mines and which must be safe. You mark suspected mines with a flag and continue uncovering the safe cells until the entire board is cleared. A single wrong click ends the game instantly, so every move must be earned by logic, not guessed.
Number-grid mine puzzles existed in the 1960s, but the version everyone knows was written by Robert Donner and Curt Johnson and shipped with Microsoft Windows 3.1 in 1992. Microsoft included Minesweeper alongside Solitaire specifically to teach mouse skills — left-click and right-click — to office workers who were transitioning from keyboard-only DOS. The result was an accident: Minesweeper became one of the most-played games of all time, completely without any marketing or planning.
After the opening cascade from your first click dies down, look at the edges and corners of the revealed region. Cells along the edge of the board have only 5 neighbors instead of 8, and corner cells have only 3. A number on an edge or corner cell is therefore much more informative than the same number in the middle, because it constrains fewer unknowns.
A 1 next to three hidden cells in a corner means exactly one of those three is a mine — a one-in-three problem. The same 1 surrounded by eight hidden cells in the middle is a one-in-eight problem. Always attack the most constrained edges first to build a foothold of certain knowledge before tackling the open interior.
When opening the first click of a game, click somewhere near the middle of the board. The middle click produces the largest possible cascade, giving you the most starting information. Corner first clicks usually give very little to work with.
The most famous Minesweeper pattern is the 1-2-1. Whenever you see three numbered cells sitting in a straight line with the values 1, 2, 1 along the edge of a row of hidden cells, the mines are always located under the two outer hidden cells (next to the 1s), and the middle hidden cell (next to the 2) is always safe.
Memorize this pattern. It appears constantly in real games and lets you solve sections of the board in seconds without working out the logic from scratch each time. Related patterns like 1-1, 1-2-2-1, and simple corner constraints follow soon after — Minesweeper expertise is largely a library of memorized number patterns combined with disciplined counting.
Every number tells you exactly how many adjacent mines exist. Once you have correctly flagged that many neighbors, all remaining hidden neighbors must be safe. This is the single most powerful and most-used deduction in the game. Whenever you flag a mine, immediately re-scan every adjacent numbered cell and ask: "Are all of this number's mines accounted for? Then everything else around it can be opened."
Many implementations let you middle-click (or click both buttons together) on a fully-flagged number to auto-reveal all of its remaining neighbors at once. This is called chording and is the secret behind every sub-minute Expert run — it can clear dozens of cells per second.
Always make every forced move before considering a guess. A forced move is one where the numbers prove with certainty that a cell is safe or that a cell is mined. Beginners often guess prematurely because the current situation looks confusing, when in fact a calm pass through the board would reveal several certain moves they missed.
Only when you have exhausted every forced move and are stuck — usually because the remaining region is genuinely ambiguous — should you guess. Even then, prefer guesses that, if correct, unlock the most new information. A safe-looking corner is often a better guess than a cell in the open middle.
Desktop: Left-click a hidden cell to reveal it. Right-click a hidden cell to flag it as a suspected mine; right-click again to remove the flag. Middle-click (or press both buttons together) on a fully-flagged numbered cell to chord — auto-reveal all of its remaining hidden neighbors at once.
Mobile / Tablet: Tap a hidden cell to reveal it. Long-press a hidden cell to flag it. Most mobile builds also let you toggle between reveal mode and flag mode for one-tap flagging.
The game runs full-screen on phones and adapts to any screen size, though Expert (30×16) boards are more comfortable in landscape orientation or on a tablet.
The classic Minesweeper has three standard difficulty levels and several geometric variations. The most popular include:
Start on Beginner to learn the patterns, then move to Intermediate. Expert is for players who already know 1-2-1, 1-1, and the standard chording flow by heart.
The goal of Minesweeper is to reveal every cell on the board that is not a mine. The board is a hidden grid of cells, some of which contain mines. Numbers on revealed cells tell you how many mines are adjacent to that cell. You win when every safe cell is uncovered, and you lose if you click on a mine.
Each revealed numbered cell tells you exactly how many mines are touching it among its eight neighbors (the cells horizontally, vertically, and diagonally adjacent). A 1 means one of those eight neighbors is a mine. A 3 means three of them are mines. By comparing overlapping number clues you can deduce which specific neighbors are safe and which are mined.
The 1-2-1 pattern appears when three numbered cells in a row read 1, 2, 1 along a single edge of unrevealed cells. Whenever this pattern occurs, the mines are always located under the two outer cells next to the 1s, and the cell next to the 2 is safe. It is the most famous and useful Minesweeper deduction pattern to memorize.
The Minesweeper version most people know was written by Robert Donner and Curt Johnson and shipped with Microsoft Windows 3.1 in 1992. Microsoft included it alongside Solitaire specifically to teach office workers mouse skills, including the right-click action, as they transitioned from keyboard-only DOS systems.
The fastest Expert times tracked on community leaderboards are under 31 seconds, which is extraordinary given that Expert is a 30 by 16 board with 99 mines. Top players combine memorized patterns, pre-planned mouse paths, and high-frequency click sequences to clear the board at almost inhuman speed. See our brain training science guide for the research on cognitive games.
In most modern Minesweeper implementations, including the classic Windows version, the first click is guaranteed safe and usually opens up a large area. Some strict variants do not guarantee a safe first click, but the vast majority of players will expect the first move to never end the game.
Put the 1-2-1 pattern and chord-flagging into practice now.
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