Click to open a square. Right-click (or long-press on a phone) to place a flag. Click a number to open everything around it.
A logic puzzle where every number tells you how many hidden mines touch that square. Use the numbers to work out which squares are safe, open them, and put flags on the mines. Your first click is always safe. Clear the whole board as fast as you can: the quicker you finish, the more points you get.
| Click | Open a square |
| Right-click / long-press | Place or remove a flag |
| Click a number | Open all its unflagged neighbours |