Clear the grid without opening a mine. Three sizes, a daily board, no-guess mode on by default, touch and keyboard controls, and best times saved in your browser.
Minesweeper is a logic puzzle in which you open every square that has no mine, using the numbers that show how many of the up to eight squares around a square hold a mine. A 1 means exactly one mine touches that square, and an empty square means none do, so the game opens its neighbours for you. You win when every safe square is open; you do not have to flag anything. If you open a mine the game ends and the mines are shown. There are three sizes: Beginner is 9 by 9 squares with 10 mines, Intermediate is 16 by 16 with 40 mines, and Expert is 30 by 16 with 99 mines. On a portrait phone Expert is drawn as 16 by 30, with the same board and the same rules. The counter shows mines minus your flags, so it can go below zero: with 12 flags on Beginner it shows -2. The timer starts at your first move (on the Daily board, when it loads), pauses while the tab is hidden, and a time of 75 seconds shows as 1:15 and 3725 seconds as 1:02:05.
With a mouse, left-click opens a square and right-click puts a flag on it or takes it off. On a touch screen, tap opens a square and a long press of about half a second flags it. If long presses are awkward, switch the Tap does buttons to Flag, and every tap then flags or unflags a closed square. Tapping or clicking an open number does a chord: when the flags around the number already equal it, all the other closed squares around it open at once. If one of your flags is wrong, the chord opens a mine, so check before you chord. From the keyboard, the arrow keys move a highlighted square, Space or Enter opens it (or chords it when it is an open number), F flags it and C chords it. Tab leaves the board. The board is sized to fit your window, up to 40 pixels a square. On a phone Beginner squares are about 32 pixels, Intermediate about 17 and Expert, drawn 16 across by 30 down, about 12 to 18, which is too small to tap reliably: use a tablet or a computer for Intermediate and Expert, or zoom in.
The mines are not placed until your first click. The first square and the eight around it never hold a mine, so the first click always opens an area. The board is then drawn from a number made of the board seed and your first square. In No-guess mode, which is on by default, each drawn board is checked by a solver before you see it. The solver starts from your first square and may only use three rules: a single number whose mines are all known opens its other squares, or whose closed squares must all be mines marks them; two overlapping numbers are compared, so a 1 next to a 2 that share all but one closed square settles that square; and the mine counter settles the last squares when no mines are left or as many mines as closed squares are left. If the solver can open every safe square that way, you get the board. If not, the next board is drawn, up to 200 times on Beginner, 300 on Intermediate and 600 on Expert. If every try fails, the last board is used, it is not guess-free, and the status line says so; in a 120-seed test per size this did not happen, but the limits are finite, so no-guess is a very strong aim and not a proof for every seed. Turn No-guess off to get a plain random board, which can need a 50/50 choice: on a 3 by 3 board with one mine in the centre, a corner click leaves four edge squares that all show 1. The Daily board opens one square for you, chosen by the date, so everyone gets the same board that day. It is always drawn with No-guess on, with the same fallback rule.
Start with the numbers next to the opened area. A number equal to the count of its closed neighbours means all of them are mines. A number whose flags already match it means every other neighbour is safe. When those two rules stop helping, compare neighbouring numbers: if a 1 and a 2 share two closed squares, the 2 has one more mine in the square only it touches. Flag mines as you find them, because flags are what make chording and the counter work. No-guess mode does not make a board easy; it only promises that a chain of deductions exists. Some chains are long, and you may need to look at a distant part of the board to find the next one.
The game in progress for each board is saved in this browser, and the last 12 boards are kept, so closing the tab and coming back to the same board carries on. Best times are kept for each size and for the daily board, with played and won counts and your daily streak. There are no hints, no undo and no custom board sizes. Retry this board, shown after a loss, restarts the same mines from the same first square without counting a new game in your stats. The Reset button clears the options, not your best times. The board is drawn with plain squares and numbers, and the game has no sound.
Almost always. With No-guess on, each board is checked by a solver that uses three fixed rules from your first click, and boards are redrawn up to 200 times on Beginner, 300 on Intermediate and 600 on Expert. If those tries ever ran out, the board would not be guess-free, and the status line would say so. With No-guess off, boards are plain random and can need a 50/50 guess.
Press and hold a closed square for about half a second, and a flag appears. Or tap the Flag button above the board, and then every tap flags or unflags a closed square; tap Reveal to go back to opening squares. Tapping an open number still chords in both modes.
Because the mines are placed after your first click, and the clicked square plus the up to eight around it are kept mine-free. So the first click always opens an area, for example at least 9 squares in the middle of a Beginner board, and nobody loses on move one.
Chording opens all the closed squares around an open number at once, after you have flagged as many neighbours as the number says. Click or tap the number, or select it with the arrow keys and press C. If one flag is wrong, a mine opens and the game ends, so check your flags first.
Yes. The daily Intermediate board (16 by 16, 40 mines) comes from your device's date, such as 2026-10-15, so everyone with that date gets the same mines and the same opened first square. It is always drawn with No-guess on, and it counts once per day in your daily streak.
No. The game runs in your browser and nothing is uploaded. Your board in progress, your options and your best times are saved in this browser's storage and stay on this device. The page counts visits with Google Analytics, never your moves or boards.