Sudoku
Play a real 9x9 Sudoku puzzle with notes mode, timer tracking, autosave, and smoother keyboard play.
How this game works
Choose easy, medium, or hard. The board stays 9x9 while clue density changes.
Turn on Notes mode to place pencil marks before committing to a final answer.
Your unfinished board resumes automatically, along with the timer and saved best times.
Type a digit or use arrow keys to move around the board.
Why this Sudoku feels easier to return to
Notes mode, autosave, and best-time tracking give players a reason to keep coming back without feeling like they have to finish everything in one sitting.
FAQs
Can I keep an unfinished puzzle?
Yes. The current board, timer, and notes are saved automatically on this device.
How does Notes mode work?
Turn it on, select a cell, and enter digits to add or remove pencil marks inside that square.
Can I use the keyboard?
Yes. Arrow keys move between cells, number keys enter values, and backspace clears a cell.
Do best times save by difficulty?
Yes. Easy, medium, and hard each keep their own best time record.
Does it work well on mobile?
Yes. The board scales down and still keeps the cells large enough to tap comfortably.