How to Play Sudoku
Fill the 9×9 grid so that each row, column, and 3×3 box contains the digits 1-9 exactly once. Start with the given numbers and use logic to determine the remaining values. No guessing required - every puzzle has a unique solution.
Sudoku Rules
- Each row must contain digits 1-9 with no repetition
- Each column must contain digits 1-9 with no repetition
- Each 3×3 box must contain digits 1-9 with no repetition
- Use logic and elimination to solve - never guess
Tips & Strategies
- Scanning: Look for rows, columns, or boxes missing only a few numbers
- Notes: Use pencil marks to track possible values for each cell
- Single candidate: If a cell can only contain one number, fill it in
- Hidden singles: If a number can only go in one place within a row, column, or box, place it there
Frequently Asked Questions
- Is this Sudoku game really free?
- Yes! SudokuFree.games is completely free to play with no signup required. Just open the page and start playing instantly.
- Will my progress be saved?
- Yes, your game progress is automatically saved in your browser. When you return, your puzzle will be exactly where you left it.
- What difficulty levels are available?
- We offer four difficulty levels: Easy, Medium, Hard, and Expert. Each level provides a different challenge suitable for beginners to advanced players.