Question 1

What is Sudoku?

Accepted Answer

Sudoku is a logic-based number puzzle played on a 9x9 grid divided into nine 3x3 boxes. The goal is to fill every row, column, and 3x3 box with the numbers 1 through 9 without repeating any number.

Question 2

How do you play Sudoku?

Accepted Answer

Start with a partially filled grid and use logic to determine the missing numbers. Each row, column, and 3x3 box must contain all digits from 1 to 9 exactly once. Look for cells where only one number is possible, and work from there.

Question 3

Is this Sudoku free and unlimited?

Accepted Answer

Yes, completely free with no download or login required. You can play unlimited puzzles across multiple difficulty levels — easy, medium, hard, and expert. Your progress and best times are saved automatically.

Question 4

What are the rules of Sudoku?

Accepted Answer

Every row must contain the numbers 1-9 with no repeats. Every column must contain the numbers 1-9 with no repeats. Every 3x3 box must contain the numbers 1-9 with no repeats. There is only one valid solution for each puzzle.

Question 5

Can I play Sudoku on my phone?

Accepted Answer

Yes! Free2Box Sudoku works on any device with a web browser — iPhone, Android, tablet, or desktop. No app download needed.

Question 6

What difficulty levels are available?

Accepted Answer

Free2Box Sudoku offers multiple difficulty levels from easy to expert. Easy puzzles have more pre-filled cells and are great for beginners. Harder puzzles require more advanced techniques like naked pairs and hidden singles.

Sudoku

Sudoku

Leaderboard

Leaderboard