Play Minesweeper free online — no download, no sign-up. Minesweeper is a browser-based logic puzzle that runs on any device. Work through 7 difficulty tiers across 7 grid sizes, build a board to your exact spec with Custom mode, take on the seeded daily challenge to grow your streak, and share your fastest clear with the challenge link.
The daily challenge resets every midnight and is the same board for every player worldwide on that date — beat the grid faster than your friends and you'll have the receipt to prove it. Your best time is saved per grid-size × difficulty, so an 8×8 Hard PB lives separately from a 10×10 Scientist PB and you can chase records on each.
From the builder's desk
My best time on a 20-mine board is 15 seconds. I mention it upfront because Minesweeper is a game people believe is about luck, and a 15-second clear isn't luck — it's the same small deduction loop run very, very fast, until the reasoning stops feeling like reasoning at all. Everything in this build exists to make that loop learnable, starting from the very first click of a game.
That first click was my most deliberate design decision: it always opens a zero-cluster. Never a mine, and never a lone number floating in darkness either. A first-click death teaches you nothing — it's the game flipping a coin against you before you've made a single decision, and it's the reason half the world grew up believing Minesweeper is gambling. A lone number is nearly as bad: one clue, no context, guess away. A zero-cluster opening blooms a whole region at once, hands you a real frontier of numbers to reason against, and lets the actual game — the logic — begin immediately. Beginners deserve a first move that starts the puzzle, not one that might end it before it exists.
Now the mistake, and it's the one separating fast players from stuck ones: flagging reflexively and never chording. Players plant a flag on every hunch, the board fills up with maybes, and the counts stop meaning anything at all. Flag discipline is strict: a flag goes down only on a proven mine — the canonical case being a "1" with exactly one unopened neighbour, where that neighbour must be the mine, no argument possible. Once a number's mines are all flagged, that number is satisfied, and here's where the speed lives: chording — clicking a satisfied number to open all its remaining neighbours in one stroke. One click, five cells, frontier advanced. Players who flag guesses corrupt exactly this machinery: chord off a wrong flag and the wrong cell opens, and the wrong cell is sometimes a mine. Over-flagging isn't caution. It's poisoning your own instrument.
So run the loop the fast players run: find the forced flags, flag only those, chord the satisfied numbers, and let each newly opened region generate the next round of forced deductions. When you hit a genuine 50-50 — they exist, and pretending otherwise wastes time — take the guess consciously, at the frontier that unlocks the most board, instead of wandering off to gamble somewhere fresh.
Seven difficulty levels scale the board and the mine density, and the daily at midnight gives everyone the identical field. Fifteen seconds took me years of the same loop getting quieter and quicker. The loop is right there on the page. It's yours now.