Free Online Sudoku Puzzles in Various Difficulties - Sudoku99

Click on the sudoku steps below to start the game!

Easy Sudoku
Level 1 (36 clues)
Level 2 (35 clues)
Level 3 (34 clues)
Level 4 (33 clues)
Level 5 (32 clues)
Level 6 (31 clues)

Perfect for beginners, these easy Sudoku puzzles offer a gentle challenge with more clues.

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Medium Sudoku
Level 7 (30 clues)
Level 8 (29 clues)

Ideal for intermediate players, these medium Sudoku puzzles provide a balanced challenge.

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Hard Sudoku
Level 9 (28 clues)
Level 10 (27 clues)

Great for advanced players, these hard Sudoku puzzles will test your skills with fewer clues.

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Expert Sudoku
Level 11 (26 clues)
Level 12 (25 clues)

For experienced players, expert Sudoku puzzles demand strategic thinking and advanced techniques.

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Expert - Silver Sudoku
Level 13 (24 clues)
Level 14 (23 clues)
Level 15 (22 clues)
Level 16 (21 clues)
Level 17 (20 clues)

These Silver-level expert Sudoku puzzles offer a significant challenge with very few starting clues.

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Expert - Gold Sudoku
Level 18 (19 clues)
Level 19 (18 clues)
Level 20 (17 clues)

The ultimate test, these Gold-level expert Sudoku puzzles are designed for the most seasoned players.

9 X 9 sudoku

9x9 Sudoku: 20 Levels of Challenging Puzzles

Sudoku99 offers 20 levels of 9x9 Sudoku puzzles, providing a range of difficulties from beginner to expert. Each level is designed to test your logical thinking and puzzle-solving skills.

4x4, 6x6, 12x12 Sudoku: Easy, Medium, and Hard Levels

Our 4x4, 6x6, and 12x12 Sudoku puzzles are available in easy, medium, and hard levels. Choose the difficulty that suits your skill level and challenge yourself with puzzles that will help improve your cognitive abilities.

About Sudoku99

Sudoku99 is your go-to source for free online Sudoku puzzles, catering to players of all skill levels. With 9x9 Sudoku puzzles offering 20 different levels, and 4x4, 6x6, and 12x12 puzzles available in easy, medium, and hard difficulties, there's something for everyone. Start sharpening your mind today with our challenging Sudoku puzzles, updated daily to keep you engaged!