Field Sweep: find every hidden mine

Field Sweep is a free logic puzzle for your browser. Mines are hidden under some of the tiles in a field. When you open a safe tile, it shows a number: how many mines touch it, counting the eight tiles around it. Use those numbers to work out which tiles are safe and which hide mines. Open every safe tile to clear the field. There are three board sizes: Easy (8×8, 10 mines), Medium (10×10, 18 mines) and Hard (12×12, 30 mines).

How to play

• Tap a tile to open it. Your first tap is always safe and always opens an area, and the timer starts then.
• A number tells you how many mines are in the eight tiles around it. A blank tile has none, so its neighbours open by themselves.
• Long-press or right-click a tile to put a flag on a mine you've found. Do it again to take the flag off.
• Turn on Flag mode to place flags with a normal tap. While it's on, a long-press opens a tile.
• Tap an open number that already has that many flags around it to open all its other neighbours at once.
• The Mines counter shows the number of mines minus the flags you've placed.
• Open a mine and the game is over. Restart gives you a new board at the same size.
• On a keyboard, use the arrow keys to pick a tile, Space or Enter to open it and F to flag it.

Tips

• A 1 with only one covered tile next to it means that tile is a mine.
• If a number already has all its mines flagged, every other tile around it is safe.
• Compare two numbers side by side. The tiles one touches and the other doesn't often settle the question.
• When you have to guess, a tile away from the numbers, such as a corner, is more likely to open a new area.

FAQ

Is my progress saved?

Your chosen board size, the number of fields you've cleared and your fastest time for each size are saved in this browser. A board in progress isn't saved, so reloading the page starts a new one.

Can every board be solved without guessing?

Not always. The mines are placed at random after your first tap, so sometimes the numbers can't tell you which tile is safe and you have to guess. Easy boards can usually be cleared by logic alone. On Medium and Hard you'll reach a forced guess more often.

What does the second chance do?

Once per game, after you open a mine, you can take back that tap. The tile is covered again and flagged as a mine, and the timer carries on.