Minesweeper: Play Free Online, Daily Board and Hive Leaderboard

Minesweeper, the classic, free in your browser

Clear the minefield without touching a mine. Every number tells you how many mines touch that cell (above, below, left, right and the four corners). Use the numbers to work out where the mines are, flag them, and open everything else. Three standard sizes (Beginner 9 × 9 with 10 mines, Intermediate 16 × 16 with 40, Expert 30 × 16 with 99) or your own size. No install, no account.

How to play

Open a cell

Left click (or tap). Your first click is always safe and opens an area. A 0 opens all the cells around it by itself.

Flag a mine

Right click (or press and hold on a phone, or switch on Flag mode). The counter on the left shows mines minus flags.

Chord

When a number already has that many flags around it, click it (or press both mouse buttons, or the middle button) to open all its other neighbours in one go. A wrong flag makes this blow up, so be sure first.

Win

Open every cell that is not a mine. You don't have to flag the mines.

The daily board

Each UTC day there is one board per level that is the same for everyone in the world. It starts on the marked cell (the blue ring) and is always a no-guess board, so it is a fair race: the leaderboard shows who cleared today's board fastest. You can play it as often as you like; your best time counts.

No-guess boards

Normal Minesweeper sometimes leaves you with a 50/50 guess. With "No-guess board" ticked, the page keeps making boards until its own logic solver can clear one from your first click without ever guessing, using only the rules a person can use (a number's flags are complete, a number needs all its hidden cells, and comparing two numbers that share cells). If it can't find one quickly it gives you a normal board and says so.

Saving to Hive

After a win you can save the result to the Hive blockchain with "Save to Hive". It sends one small public message (a custom_json operation with the id mes_mines) from your Hive account, signed with your posting key through Hive Keychain (the browser extension or the phone app). It contains the board's seed and size, your time, the 3BV and the list of your clicks with their timing, and nothing else. It costs nothing (only a little of your account's free Resource Credits), and like everything on Hive it is public and permanent. Your posting key never leaves Keychain; mes.fm never sees it and can't do anything else with your account. mes.fm then replays your clicks on the same board to check the win before it goes on the leaderboard.

Questions

What is 3BV?

The "Bechtel's Board Benchmark Value": the smallest number of clicks that clears the board (one for each open area plus one for each number that doesn't touch an open area). 3BV per second (3BV/s) compares speed across boards of different difficulty.

What does the Hint button do?

It shows one cell that can be proved safe (green) or a mine (red) from what you can see. It never peeks at hidden mines. A game where you used a hint is marked "assisted" and doesn't count for best times or the leaderboard.

Can I play Expert on a phone?

Yes. The board scrolls inside its box, the − and + buttons change the cell size, and Flag mode or press-and-hold places flags. Fill window gives the board the whole screen.

Are my times kept?

In this browser, under Statistics: games, wins, streaks, your ten best times per level with 3BV/s. Nothing is uploaded unless you press Save to Hive.

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