Click to open, right-click to flag, click a number to open around it. Keys: arrows move, Space opens, F flags, N new game, H hint, U undo.
Statistics, settings and any game in progress are saved in this browser only. Nothing is sent anywhere.
The board hides a set number of mines. Open a cell and it shows how many mines touch it. Use those numbers to work out where the mines are, flag them, and open every other cell to win. Open a mine and the game is over. Your first click is never a mine, and it always opens a patch of empty cells when there's room.
Right-click (or long-press on a phone, or turn on Flag mode) to plant a flag on a cell you think is a mine. Once a number has that many flags around it, click the number to open all its other neighbours at once. This is called chording; a wrong flag will set off a mine. Question marks can be switched on in Settings.
Beginner is 9 × 9 with 10 mines, Intermediate 16 × 16 with 40, Expert 30 × 16 with 99. Custom boards go from 5 × 5 up to 50 × 40. On a narrow phone screen a wide board is turned on its side, so Expert shows as 16 columns by 30 rows.
Same rules on a honeycomb. Each cell has six neighbours instead of eight, so the numbers only go up to 6 and the patterns you look for are different.
The edges join up: the left column is next to the right one and the top row is next to the bottom, as if the board were wrapped round a doughnut. Every cell has eight neighbours, including those on the edge and in the corners, so the corners lose their usual easy clues.
Ordinary boards are random, and now and then you reach a spot where no amount of logic helps and you must guess. With No guessing switched on, a board is only dealt if a solver can clear it from your first click by reasoning alone. If no such board turns up within a couple of seconds (very dense custom boards), you're told it may need a guess.
One Intermediate board a day, the same for everyone, always solvable without guessing. It starts already opened at the same spot for everyone, so times compare fairly. Your result and a daily streak are kept on your device.
A hint points to a cell that can be proven safe from what's showing, or to a flag that's wrong. Undo can even take back the mine that ended the game. Games where you used a hint or undid an opening still count as wins, but not as best times, and a loss stays a loss. Unfinished games aren't counted. Replaying a board doesn't change your statistics.
No. The game runs in your browser and works offline once loaded. Statistics and settings stay in this browser's storage; export, import or delete them under Settings. No ads, no account.