Puzzle
Puzzle
Sudoku
Fill the grid with numbers, one careful deduction at a time.
Keyboard · Touch · Mouse
This game needs a keyboard. You can try it here, but touch controls are not available.
How to play
- Select a square, then use the number pad or keyboard.
- Fill every row, column and 3×3 box with 1–9, without repeats.
- Keep possibilities in pencil notes; Check finds mistakes, Undo reverses moves.
All instructions
Fill each row, column and 3×3 box with 1–9, without repeating a number. Select a square, then use the number pad or keyboard. Pencil notes keep possibilities; Undo reverses a move. Check highlights mistakes. Difficulty changes the number of clues.
Modern desktop and mobile browsers. Progress lasts only while this game stays open.
