THE PLAYBOOK
About Sudoku
Overview
Free online Sudoku with multiple difficulty levels. Fill a 9×9 grid with digits 1–9 so that each row, column, and 3×3 box contains every number exactly once. Train your logical thinking, suitable for all ages.
How to play Sudoku
Inspect the given digits in the 9 × 9 grid.
Fill empty cells with 1–9 without repeating a digit in any row, column or 3 × 3 box.
Continue eliminating candidates until every cell is filled.
Tips & strategy
- Look for a digit with only one possible position in a row, column or box.
- Check candidates against all three constraints before filling a cell.
Common questions
Do I need arithmetic to solve Sudoku?
No. Standard Sudoku uses placement and elimination. The digits are distinct symbols; you do not add or multiply them.
How do I start playing Sudoku?
Use the play button above to open the player. If a third-party content prompt appears, confirm it to load the game. Follow the instructions shown inside the game for its controls.
What if the game does not load?
Check your connection and try the player’s reload control. Third-party games may be temporarily unavailable; if loading still fails, try another title from the recommendations on this page.