Customize the Board Setup Standard Starting Positions
Total number of plays: 350781
Board InformationBomb Defuser has a few built in standard starting positions to choose from.
Beginner has 81 tiles and 10 bombs.
Intermediate has 256 tiles and 40 bombs.
Expert has 480 tiles and 99 bombs.
You can also create a custom board by entering whatever starting position you want into the input boxes above. We support sizes up to 30x24 and a 90% density of bombs, though expert is just over 20% density of bombs.
Explanation of ImagesBomb Defuser has many images on particular squares to tell you everything about the board. An explanation of all the images that can appear on a square are below.
This is an unrevealed square. You can reveal it by clicking it, or choose to mark it with a flag.
This represents a flagged square. You can space flags on unrevealed squares by Shift+Clicking on them. A flag is placed by you on a square where you think a bomb lays hidden. It is only for your reference and some protection, as you cannot reveal a square which has a flag on it. You can remove a flag by Shift+Clicking again.
Revealed and End of Game Squares
The above are "numbers." They tell you that a square has that many bombs in the eight surrounding squares. The blank square represents "0" bomb neighbours.
This is a bomb. If you did not place a flag on a bomb square, this image will appear on the square when the game is over.
This is also a bomb. This is the particular bomb you revealed to lose the game.
This is a "no bomb" square. If you placed a flag on a square that did not hide a bomb, this image will appear on that square when you go on to lose the game.
This is a bomb that you have flagged. After the game is over (win or lose), bombs that you placed a flag on will remain as flags.
Hints and TipsMark the Bombs
If you suspect a square conceals a bomb, right-click or shift+click it. This puts a flag on the square. (If you're not sure, middle-click or ctrl+click to make it a question mark.)
Marking bombs also allows the "fast uncover" option, in that when you have the correct number of flags around a number square, and you click that number square, it uncovers all of the neighbours of that square that are not flagged.
Study the Patterns
If three squares in a row display 2-3-2, then you know three bombs are probably lined up beside that row. If a square says 8, every surrounding square is a bomb.
Explore the Unexplored
Not sure where to click next? Try clearing some unexplored territory. You're better off clicking in the middle of unmarked squares than in an area you suspect is a bomb.');