Minesweeper

What this tool does

Minesweeper recreates the classic logic puzzle: left-click to reveal cells (your first click is always guaranteed mine-free, with surrounding safe cells auto-revealed by flood fill), right-click to flag suspected mines, and clear every non-mine cell to win, at easy, medium or hard difficulty.

Minesweeper is the classic logic puzzle: a grid hides a set number of mines, numbers on revealed cells tell you how many mines touch that cell, and the goal is to safely reveal every non-mine cell without ever clicking a mine.

This version guarantees your very first click is always mine-free (and reveals a safe surrounding area via flood fill), supports right-click flagging for suspected mines, and offers easy, medium and hard presets.

How to use Minesweeper

1. Choose easy (9×9), medium (12×12), or hard (15×15) difficulty.
2. Left-click any cell to reveal it, your first click is always guaranteed safe.
3. Right-click a cell to toggle a flag on a suspected mine.
4. Use the revealed numbers (mines touching that cell) to logically deduce safe cells, clearing every non-mine cell wins.

Tips for better results

• A revealed "0" cell (shown blank) means no adjacent mines, the flood-fill reveal automatically opens its entire connected safe region, saving you from clicking each cell individually.
• Flags are purely a memory aid for you, they don’t affect the game logic directly, but flagging suspected mines helps you track your own deductions, especially on larger, harder boards.
• If a numbered cell’s count exactly matches its number of adjacent flagged cells, every other adjacent unrevealed cell is guaranteed safe to reveal.
• Harder difficulty increases both grid size and mine density, requiring more careful logical deduction and reducing the proportion of "obviously safe" cells.

Common use cases

• A classic logic puzzle for a focused mental break.
• Practicing systematic deduction strategies at increasing difficulty levels.
• A nostalgic recreation of the puzzle bundled with older versions of Windows.
• A quick, no-install browser game for logic puzzle fans.

Common mistakes to avoid

• Clicking randomly instead of using the revealed numbers to deduce safe cells, systematic Minesweeper relies on tracking which cells are provably safe or provably mines based on each numbered cell’s count versus its flagged/unrevealed neighbors.
• Forgetting that only your very first click is guaranteed safe, every subsequent click carries a real risk if you haven’t correctly deduced that cell is mine-free.
• Not using flags to track suspected mines on a larger, harder board, this makes it much easier to lose track of your own deductions as the board gets more complex.