How to Play Minesweeper — Free Online Rules & Strategy

To play Minesweeper you uncover tiles on a grid that hides mines, and every tile you open shows a number counting how many of its eight neighbouring tiles are mined. That number is the entire game: you use it to prove which nearby tiles are safe and which are mines, then open the safe ones and flag the rest. You win when every non-mine tile is uncovered — you never have to flag anything to win. Left click reveals, right click flags, and on a phone a long press does the flagging. You can play it free right now, with no download and no sign-up, at Offline Games Arcade. This guide covers the rules, then the handful of number patterns that solve the large majority of boards without guessing.

The rules in one minute

Click a tile to reveal it. If it hides a mine, the round ends. If it does not, you get a number — or a blank.
A number counts touching mines. A 3 means exactly three of that tile’s eight neighbours (including diagonals) are mines. Not the row, not the column — just the eight surrounding squares.
A blank means zero. Tiles with no adjacent mines open automatically, and they cascade outward until they hit numbered tiles. This is why one lucky click can clear a third of the board.
Right click to flag. Flags are your notes, not a game mechanic. They stop you from misclicking a known mine, and most versions let you see how many you have placed against the total mine count.
Clear every safe tile to win. Flags are optional. Uncover all the non-mine squares and the board is solved.

The first click is worth calling out separately, because it is the most common question about the game.

Why the first click is always safe

In essentially every modern version of Minesweeper, including the one here, the board is not fully decided until after you click. The game lays its mines around your first pick, so opening move number one can never kill you. Many implementations go further and guarantee the first click lands on a blank, giving you an opening cascade to work from.

The practical consequence: there is no skill in the first move, so do not agonise over it. Click somewhere central. A middle click has more neighbours than a corner click, so the cascade it opens tends to be bigger and leaves you with more numbered edges to reason from.

Reading the numbers: the two rules that do all the work

Everything past the opening reduces to two pieces of logic. Apply them to one numbered tile at a time.

Rule 1 — if the count equals the hidden neighbours, they are all mines. Take a tile showing 2 that has exactly two unopened tiles left beside it. Both of those must be mines. Flag them and move on.

Rule 2 — if the count is already satisfied, everything else is safe. Take a tile showing 2 that already has two flags beside it. Every other hidden neighbour of that tile is guaranteed clear. Open all of them.

That is the whole engine. Beginners lose boards not because these rules are hard but because they check one tile, act, and forget to re-check the neighbours whose situation just changed. Every reveal creates new information. Work outward along the frontier — the border between opened and unopened territory — and re-read each number after the board changes.

The patterns worth memorising

Once the two rules feel automatic, most of the middle game becomes pattern recognition. These are the shapes that come up constantly along a straight wall of revealed tiles.

The 1-1 pattern. Two adjacent 1s sitting along a wall, with hidden tiles in front of them. The first 1 is satisfied by one of the two tiles it shares with its neighbour, which means the tile beyond that pair — the third one along — is safe to open.
The 1-2 pattern. A 1 next to a 2 along the same wall. The 2 needs a mine in the tile at its far end, and that tile is forced. This one pattern cracks open more stuck boards than any other.
The 1-2-1 pattern. Three tiles reading 1, 2, 1 in a row. The mines sit under the two outer 1s, and the tile in front of the 2 is safe. It resolves instantly, every time.
Counting the remainder. Late in a round, compare your flag count to the total mine count shown in the header. If four mines remain and exactly four tiles are hidden, the board is finished — flag them all.
Subtracting overlaps. When two numbered tiles share hidden neighbours, subtract. A 2 and a 1 sharing two tiles tells you the 2 has one mine outside the shared pair, which often forces a single specific square.

When you genuinely have to guess

Minesweeper is a logic puzzle with a small amount of luck baked in, and pretending otherwise leads to frustration. Some boards reach a position where no amount of deduction resolves the frontier — classically a corner where two tiles are equally likely, and you simply pick one.

Two habits reduce how often this happens. First, exhaust the whole frontier before guessing, including the far side of the board; a forced move somewhere else can cascade back and resolve the spot that looked stuck. Second, when you must guess, prefer a tile with the lowest implied probability rather than the nearest one — a tile bordered by a 1 with three hidden neighbours is a one-in-three risk, while a tile in the untouched interior carries roughly the board’s average mine density. Compare the two before you commit.

Tips that shorten a round

Start in the middle. More neighbours means a larger opening cascade and more numbered edges to work from.
Flag as you go. Flagging confirmed mines is what makes Rule 2 usable, and it prevents the ugliest loss in the game: misclicking a square you already knew about.
Work the frontier, not the grid. Scan along the border between opened and closed tiles instead of hunting randomly.
Re-read after every reveal. A number that was ambiguous three clicks ago is often forced now.
Slow down at the end. The last few tiles are where the count arithmetic pays off and where rushing costs you an otherwise solved board.

If you like Minesweeper, try these next

Minesweeper belongs to a family of pure-deduction puzzles where the board contains everything you need and guessing is the fallback rather than the method. The same reasoning transfers well:

Nonogram — number clues along the rows and columns tell you which cells to fill, and the solve is the same overlap-and-subtract logic in two directions.
Sudoku — constraint solving with no hidden information at all, which makes it the cleanest version of the deduction habit.
Bridges Puzzle — connect numbered islands with the exact number of bridges each one demands.
Logic Detective — grid-based deduction from a list of written clues, closer to a classic logic-grid puzzle.
Code Breaker — guess a hidden code and narrow it down from feedback, which is deduction under uncertainty rather than proof.
Naval Battle — hunting hidden ships on a grid, the two-player cousin of hunting hidden mines.
Lights Off — a toggle puzzle that rewards planning a full sequence before you touch anything.
Water Sort — sorting under tight constraints, where one careless pour dead-ends the board.

All of them run free in the browser with nothing to install, alongside the rest of the puzzle games in the catalog.

FAQ

What does a number mean in Minesweeper? It counts how many mines touch that tile across its eight neighbours, diagonals included. A 3 means exactly three of the surrounding eight squares are mined.

Is the first click ever a mine? No. In essentially all modern versions the mines are placed after your first click, so the opening move is guaranteed safe — and often guaranteed to open a blank cascade.

Do you have to flag every mine to win? No. You win by uncovering every safe square. Flags are a bookkeeping aid that make the logic easier to apply and stop you misclicking, but the game does not require them.

How do you flag a mine on a phone? Long-press the tile instead of right-clicking it. Some versions also offer a flag-mode toggle so a normal tap places flags.

Is Minesweeper pure logic, or is there luck? Mostly logic, with a little luck. Most boards are fully solvable by deduction, but some reach positions where two tiles are genuinely equally likely and you have to pick one.

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