Sudoku
Sudoku: rules, tips, printables & play
Sudoku is a classic logic puzzle: fill a 9×9 grid so every row, column, and 3×3 box contains 1–9 exactly once. On this page you can try a mini Sudoku, learn the rules, and find printables and strategy guides.
Play now
Try a mini Sudoku
Want to start immediately? Load a lightweight mini Sudoku in your browser (lazy‑loaded to keep performance fast).
What is Sudoku?
Sudoku is a logic puzzle, not a math puzzle. You start with a partially filled grid and use deduction to fill the remaining cells.
How to play (quick rules)
- Each row contains the digits 1–9 exactly once.
- Each column contains the digits 1–9 exactly once.
- Each 3×3 box contains the digits 1–9 exactly once.
New to Sudoku? Read the full guide: How to play Sudoku.
Tips to improve faster
Start with easier grids and learn patterns like singles and pairs. A good next step is our tips page: Sudoku tips.
Free printable Sudoku PDFs
Prefer paper? Download weekly printable packs (A4 & Letter) across difficulties: Printable Sudoku puzzles.
Sudoku FAQ
What is Sudoku?
Sudoku is a 9×9 logic puzzle where each row, column, and 3×3 box must contain digits 1–9 once.
What are the rules?
No duplicates: every row, column, and 3×3 box contains 1–9 exactly once.
Where can I get printable Sudoku puzzles?
Get free printable PDFs here: printable Sudoku puzzles.
How can I get better at Sudoku?
Learn core techniques in our Sudoku strategies and start with easier puzzles.