Games / Sudoku
Sudoku
The classic number puzzle. Fill every row, column and 3×3 box with the digits 1 to 9. Every puzzle has exactly one solution, and you can always find it by logic.
1 player, spectators welcome
Open Sudoku lobbies
No open lobbies right now. Start one above and you're the first.
How to play
- Pick a square, then pick a number to put in it.
- Every row, every column and every 3×3 box must hold the digits 1 to 9 exactly once.
- Switch on pencil mode to jot down candidates in a square.
- Matching numbers are highlighted and clashes turn red, so you can spot mistakes early.
- Stuck? Ask for a hint, or check your entries against the answer.
Controls
- Click or tap
- Select a square
- 1 to 9
- Enter a number (or a pencil mark in pencil mode)
- Backspace or 0
- Erase the square
- Arrow keys
- Move around the grid
- N
- Toggle pencil mode
- Ctrl/Cmd + Z
- Undo