How to Play Sudoku
Learn the core Sudoku rules and start solving quickly in a clean online interface.
Sudoku Rules in Plain Language
Every row, column, and 3×3 box must contain digits 1 to 9 exactly once. No duplicates are allowed in any unit.
How to Start Your First Puzzle
Find rows or columns with many givens, place obvious digits first, and use notes when two or more candidates remain.
Practice Path for Beginners
Begin with easy sudoku, then move to medium. Use hard and expert once your candidate handling becomes consistent.
How to Play Sudoku FAQ
How do I start solving a Sudoku puzzle?
Start with rows, columns, or boxes that already contain many digits, then place only numbers that fit all three constraints.
What is Classic 9×9 Sudoku?
It is the standard Sudoku format with a 9×9 grid and nine 3×3 boxes where digits 1 to 9 must appear exactly once per unit.
What are the benefits of playing Sudoku?
Sudoku helps train concentration, logical reasoning, and pattern recognition through short repeatable practice sessions.