15-Puzzle
Puzzle
Sudoku
Sudoku
A fresh daily Sudoku and endless puzzles from Easy to Expert.
About Sudoku
Play Sudoku free in your browser. Fill the 9×9 grid so every row, column and 3×3 box holds the numbers 1 to 9 once. Every puzzle has exactly one solution: Easy and Medium can be solved with simple elimination, Hard and Expert need deeper logic. Play the daily puzzle (the same for everyone) or a new one at any level, with pencil notes, automatic notes, undo, hints and mistake checking. Leave mid-puzzle and continue later.
How to play
Click a cell, then a number on the pad (or type 1–9). Press N to switch to pencil notes for small candidate numbers. Wrong numbers show in red. Fill every cell correctly to win; a faster solve with fewer mistakes and hints scores more. Arrow keys move, Backspace erases, Z undoes, H gives a hint.
| Action | Keyboard | Touch |
|---|---|---|
| Select a cell | ClickArrows | Tap |
| Enter a number | 1–9Number pad | Number pad |
| Pencil notes | N | NOTES button |
| Erase | BackspaceDelete | ERASE button |
| Undo · hint | ZH | UNDO · HINT buttons |
Tips for Sudoku
- Start with the numbers that already appear most: their remaining places are easiest to find.
- Scan each 3×3 box for a number it's missing, and check which cells the rows and columns rule out.
- Use pencil notes (N) for cells with two or three candidates — or AUTO NOTES to fill them in at once.
- When a number can only go in one row or column inside a box, it rules that number out of the rest of that line.
- Mistakes and hints cost points, but the speed bonus is generous — a steady, careful solve scores well.
Questions about Sudoku
Does every puzzle have one solution?
Yes. Every puzzle is checked to have exactly one solution, so it can always be solved by logic.
What's the difference between the levels?
Easy and Medium can be solved by finding cells with only one possible number. Hard and Expert have fewer clues and need deeper techniques.
Is there a daily Sudoku?
Yes — a new daily puzzle every day, the same for everyone. Solve it on consecutive days to build a streak.
Can I continue later?
Yes. Your puzzle is saved as you play; choose CONTINUE on the menu to pick up where you left off.
Is Sudoku free?
Yes. Sudoku is free to play on Nexora Play, with no download and no sign-up needed.
Can I play Sudoku on my phone?
Yes. It runs in the browser on computers, tablets and phones, with touch controls on phones and tablets. You can also add Nexora Play to your home screen like an app.
Do I need an account?
No. You can play as a guest and your best scores are kept in this browser. A free account (13+) keeps your progress across devices.
