Minesweeper Strategy — Logic Techniques That Actually Win
Minesweeper is mostly logic, not luck. Learning these techniques dramatically cuts down how often you're forced to guess.
1. Compare sets of unopened cells
Treat each clue's unopened neighbors as a set after subtracting confirmed flags. If one set is fully contained in another, the difference in their remaining mine counts is the number of mines in the outer cells. A difference of zero makes all outer cells safe; a difference equal to the number of outer cells makes them all mines. Two overlapping 1s alone do not prove that a cell is safe.
2. Subtract confirmed flags from the number
If the flags already placed around a number equal that number, every other unopened neighbor is safe. Conversely, if the number equals the count of unopened neighbors, all of them are mines.
3. Clear corners and edges first
Edge cells have fewer neighbors (corners have just 3), so the logic is simpler. Nailing down edges before tackling a dense central cluster builds up safe information faster.
4. When truly stuck, guess the lowest-probability cell
Some boards genuinely cannot be solved by logic alone. If you must guess, compare each cell across all mine placements consistent with the clues, including the total mines and unconstrained cells still remaining. A cell is not automatically safer merely because it touches no revealed number.
5. Use chording to speed up
Once you've flagged exactly as many mines as an open number indicates, pressing that number again opens all its remaining unflagged neighbors at once — far faster than opening each cell individually.
Common mistakes
- Not flagging when a number already equals its unopened-neighbor count
- Tackling the dense center first while ignoring simpler edges
- Clicking cells purely on a hunch instead of comparing probabilities
- Not knowing about chording and opening every cell one at a time