WIN-J PLAY Classic games
Sudoku
A quiet moment with a fresh 9×9 number puzzle. Use pencil notes, hints and undo to find the one correct solution.
Preparing your game…
Take a break. Resume when you are ready.
Select a cell, then use the number pad or keys 1–9. N toggles notes; Backspace erases. Red cells show duplicates in a row, column or box.
Play stays in this browser. A new game, page reload or language change resets progress. Scores and input are not sent to a server.
How to play
- Select an empty cell and enter a number from 1 to 9. The darker given numbers cannot be changed.
- Fill every row, column and outlined 3×3 box without repeating a number.
- Keep candidates in Notes and use a Hint when you need help. Finish by filling every cell correctly.
Good to know
Each puzzle is generated in this browser and checked for a unique solution. Difficulty is based on the number of clues, rather than a guaranteed solving technique.
Red cells highlight duplicates among your current entries. An entry without a conflict can still be wrong. Undo does not reduce the number of hints used.
Play without signing in or submitting a score.