Sudoku
Sudoku
✦ Free to Play✦ No Download✦ Touch Friendly
About Sudoku
Classic Sudoku in a modern colourful shell. Choose Easy, Medium, Hard, or Expert, then fill every row, column, and 3×3 box with the digits 1 through 9 — no repeats allowed. Use pencil notes to track possibilities, watch the timer, and chase your best time. Puzzles are procedurally generated from millions of unique configurations.
How to Play Sudoku
- Tap a cell to select it, then tap a number on the pad (or press 1–9 on a keyboard) to fill it in.
- Every row, every column, and every 3×3 box must contain all digits from 1 to 9 — no repeats.
- Pre-filled white numbers are clues and cannot be changed.
- Toggle the ✏ Notes button to jot down candidate numbers as small pencil marks inside a cell.
- Tap ⌫ Erase (or press Delete) to clear a cell. Solve the puzzle in the shortest time!
Frequently Asked Questions
How are puzzles generated?
Each game transforms a valid seed board using randomised digit, row, and column permutations — giving millions of unique puzzles with guaranteed unique solutions.
What do the pencil marks do?
In Notes mode, tapping a number adds or removes a small candidate mark in the cell to help you track possibilities without committing to an answer.
Is my best time saved?
Yes — your best completion time for each difficulty level is saved in your browser automatically.
