Click to reveal · right-click, long-press, or 🚩 mode to flag · click a number to chord
Every number tells you how many mines touch that tile, counting all eight neighbours. Clear every tile that isn't a mine and you win. Your first click is always safe — the mines are laid after it, and never in the nine tiles around it, so you always open into a cascade.
Right-click, long-press, or turn on 🚩 mode and tap. Flag mode swaps the two inputs rather than removing one: with it on, a right-click or long-press opens a tile. Your first tile always opens either way. With question marks on (settings), tiles cycle flag → ? → clear, for the ones you're unsure about. A ? is only a note to yourself — it never counts toward a chord.
Click a revealed number that already has exactly that many flags around it, and every remaining neighbour opens at once. It's the fastest way to play — and it will happily detonate a mine if one of your flags is wrong. Hold the number before you let go and the tiles it would open are outlined; if the flags don't add up, the number shakes instead.
Classic boards are dealt at random, which means a board can hand you a position with two tiles, one mine and nothing to tell them apart. Fair boards (settings) are dealt until one turns up that can be cleared from your opening click by deduction alone — a fair board never requires a guess. It doesn't make the deduction easy, only certain.
Fair boards keep their own records, since they aren't the same game. Searching happens after your first click and usually takes a few milliseconds; the clock doesn't start until a board is found. Dense custom boards are the exception — above roughly a third of the grid, fair boards essentially don't exist, and the search will say so while it keeps looking. You can take the board it's holding, or cancel.
3BV is the smallest number of left-clicks that could possibly clear the board: one per opening, plus one for every number that isn't touching an opening. It measures the board, not you.
Efficiency is 3BV ÷ the clicks you actually used (reveals, chords and flags all count). 100% means you never wasted a click; chording is how you get there. 3BV/s is board difficulty cleared per second — the number speedrunners chase.
Expert is 30 columns across and 16 rows down, so it needs a genuinely large window — a tablet or a desktop. Any size that can't be drawn with tappable tiles is disabled rather than shrunk into uselessness. Turning a phone sideways won't help: you gain width but lose the height the rows need, which is why Medium and Hard drop out in landscape too. Whatever you're already playing stays playable.
Number style changes what a revealed count looks like — pips draws dice faces instead of digits. Everything here is remembered on this device.
| played | won | win% | streak | best | 3bv/s |
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