Reveal a tile and let the numbers guide your next move. Flag the suspicious spots and uncover the safe areas at your own pace.
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Easy uses a 9×9 board with 10 mines; Advanced uses a 16×16 board with 40 mines. On the first reveal, the 3×3 area centered on the chosen tile contains no mines, so the first tile is always blank. Each number shows the mines in its eight neighboring tiles. Reveal every safe tile to win; revealing a mine ends the round. You cannot place more flags than the number of mines. When a revealed number has the same number of adjacent flags, click it again to reveal all unflagged neighbors at once; incorrect flags can still cause you to hit a mine. Only winning completion times count toward the personal best, stored in seconds separately for each difficulty in the current browser.
Choose a difficulty and click Start to prepare the board; the timer begins only when you first reveal a tile. Left-click to reveal, or right-click to place or remove a flag. On touchscreens, choose Reveal or Flag, then tap a tile. Keyboard: arrow keys move focus; Enter or Space reveals or flags in the current mode; F places or removes a flag; P or Esc pauses or resumes; and R restarts once the board is prepared. Hiding the page, switching away from the window or scrolling the board out of view pauses automatically; resume manually.
Start with the numbers around the edge of an open area, and place flags only after identifying the mines. Check flag positions again before opening a number’s neighbors. If you are unsure, look at another number for more clues.
If a revealed 1 has only one unopened neighbor, that neighbor must be a mine. If you have correctly flagged its one mine, the other neighboring tiles are safe. Chording checks the number of flags, not whether they are correct, so verify their positions first.
Easy uses a 9×9 board with 10 mines; Advanced uses 16×16 with 40. Each difficulty keeps its own fastest winning time. The clock starts with your first reveal and stops while paused. Records stay in this browser; clearing site data removes them, and they do not sync across devices.