How to Play Sudoku
Learn how to play Sudoku step by step. Beginner-friendly tutorial covering rules, strategies, and tips to improve your game.
You’ve mastered the three fundamental rules and are ready to play.
- Rows — Each row contains 1–9 exactly once
- Columns — Each column contains 1–9 exactly once
- 3×3 Boxes — Each 3×3 box contains 1–9 exactly once
FAQ
How do you play Sudoku?
Fill a 9×9 grid with numbers 1–9 so that every row, every column, and every 3×3 box contains each number exactly once. For each empty cell, check its row, column, and box — the answer is the one number not already present in any of them.
What are the rules of Sudoku?
There are three rules: (1) Each row must contain the numbers 1–9 with no repeats. (2) Each column must contain the numbers 1–9 with no repeats. (3) Each of the nine 3×3 boxes must contain the numbers 1–9 with no repeats.
What is Sudoku X?
Sudoku X (also called Diagonal Sudoku) adds an extra constraint: both main diagonals of the 9×9 grid must also contain the numbers 1–9 with no repeats. This makes it a more challenging variant of classic Sudoku.
What difficulty levels are available?
Betty Bee Sudoku offers five difficulty levels: Easy, Medium, Hard, Extreme, and Insane. Each level provides fewer given numbers and requires more advanced solving strategies.
Is Betty Bee Sudoku free to play?
Yes — Betty Bee Sudoku is completely free to play with no ads. New puzzles are available every day across all difficulty levels, and no account is required to start playing.