What Is Minesweeper?
Custom Minesweeper lets you leave the fixed Beginner, Intermediate, and Expert presets and choose the board shape yourself.
The default 30x20 board with 145 mines is larger than Expert, but still easier to scan than the maximum 100x100 setup.
Use custom boards to practice wide openings, dense minefields, or unusual rectangular layouts.
How to Play Minesweeper
Custom Minesweeper is best when you choose a board size with a clear goal in mind.
- 1Set Width and Height to define the board shape.
- 2Choose a mine count that leaves enough safe cells for deduction.
- 3Press Update to generate the custom board.
- 4Use flags to track certain mines instead of guessing.
- 5Try smaller custom boards before pushing toward the 100x100 maximum.
Custom Minesweeper Settings
- •Custom mode starts at 30x20 with 145 mines for a large but readable board.
- •You can adjust width and height up to 100 by 100.
- •Mine count is capped at 2480 and also kept below the number of available safe opening cells.
Minesweeper FAQ
What is the default custom Minesweeper board?
Custom Minesweeper starts at 30x20 with 145 mines. You can change the width, height, and mine count before pressing Update.
Is the first click safe?
Yes. Mines are placed after your first reveal, so the opening click and its nearby cells are safe.
How do I place a flag?
Use right click on desktop, or turn on Flag Mode on mobile and tap a square.
What are the classic Minesweeper sizes?
Beginner is 9x9 with 10 mines, Intermediate is 16x16 with 40 mines, and Expert is 30x16 with 99 mines.