Tap to open. Right-click, or switch to "placing flags", to mark a mine
No time recorded for this size yet
Each number tells you how many mines sit in the eight squares around it. That is the only clue you get. Clear every square that is not a mine — and the first click can never lose.
FAQ
How do I place a flag on a phone?
Press the button to switch from "opening cells" to "placing flags", then tap. Press it again to switch back. A toggle rather than a long press, because long-press thresholds vary by device and produce accidental openings.
Why is the first click always blank?
Mines avoid the clicked square and its eight neighbours, so that square has zero mines around it. Squares with zero neighbouring mines open in a chain, so the first click always reveals a wide area.
When does the clock start?
When you open the first square. Choosing a size or looking at the board costs nothing, and the clock stops the moment you win.
Can anyone see my times?
No. They live only in this browser on this device, and there is no leaderboard or account. Private browsing may block storage entirely.
Does it work offline?
Yes. Once the page has loaded, everything runs inside the browser.