Minesweeper
Open the keys. C is a mine, like clear. A number tells how many C keys sit next door.
This is classic Minesweeper on a calculator keypad. Also try Snake and Tetris.
Keypad
MINES 10 t=0 s
Result
Open keys. C is a mine. The LCD keeps the clock.
How to play
- Pick a level and a C-mine count. Click Start, then open a key. The first click is safe.
- A number is the count of neighbouring C keys. Flag the C keys.
- Open every safe key to get OK on the LCD.
Formula
For an open cell, n = count of mines in the eight neighbours. Win when opened = cells − mines.
Frequently asked questions
What is a mine?
A mine is a C key, like clear on a calculator. An opened number tells how many C keys sit next to it.
How do I flag a cell on a phone?
Turn Flag on, then tap the key. On a computer the right mouse button also works.
Can the first click hit a C?
No. The first open and its neighbours stay empty. Mines are planted after that.
What levels and mine counts can I pick?
Seven keypads: from 8×8 to 24×24, plus classic expert 30×16. Mine count is a second setting, from a sparse grid to a dense one. The clock sits on the LCD.
Knowledge sources
This is play on a calculator keypad, not sports training and not a bet.
Page updated in 2026.