Minesweeper

Clear every safe square — the numbers tell you where the mines are

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Field

Size

Danger

No guessingOnly lay out fields that can be solved by thinking alone. Question marksA second right-click marks a square you're unsure about. Open around a finished numberClick a number with all its mines flagged to open the rest.

Play

Mode

How to play

Somewhere under the field are the mines. Clear every square that isn't one and you've won — you never have to flag a single mine to finish.
Click a square to open it. A number says how many of the eight squares around it hold a mine; an empty square has none, so its neighbours open too, and whole rooms come clear at once.
Right-click (or press Flag above the field, then tap) to plant a flag where you're sure a mine is. On a phone a long press flags as well.
Click a number that already has all its mines flagged to open everything else around it in one go — the quickest way through a field. Get a flag wrong and it will blow up in your face.
Your first click is always safe, and it always opens a room rather than a lone number.
With No guessing ticked the field is laid out so that careful thinking is always enough — you will never be left flipping a coin. Hint points at a square that can be worked out right now, and tells you what proves it.
Keys: N new field, H hint, M sound, F full screen. Arrow keys walk the field, Enter opens a square and Space flags it.
Race a friend sends a link. You both get the very same field, laid out by the two devices together, and you can watch each other's progress as you dig. First to clear it wins.

Solving, not guessing

Count the flags, not the mines. A number minus the flags already around it is what's left to find. When that reaches zero, everything else touching it is safe.
When the number equals the hidden squares around it, every one of them is a mine. These two rules alone will clear most of a field.
Compare two numbers side by side. If a 1 and a 2 share squares, the mines the 2 needs and the 1 doesn't must sit in the squares only the 2 can see — that's where the 1-2 patterns come from.
Work the edges of the opening rather than the middle of nowhere: every deduction starts from a number you can already see.
Count what's left at the end. The mine counter is information too — when the mines left equal the squares left, they're all mines.
Stuck? Hint finds a square that today's numbers already prove, and says which number proves it.