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All 9x9 Sudoku Difficulty Levels

Sudoku99 proudly offers 20 progressive levels of 9x9 puzzles β€” designed for both beginners and experts. Each level reduces clues and increases challenge, but always ensures one unique logical solution.

Find Your Ideal Sudoku Challenge

Expert - Gold Level 18 (19 clues)

Structured by Logic, Not Luck

20 fixed levels (from 36 to 17 clues)
150,000+ puzzles β€” no duplicates
Every puzzle tested for logical uniqueness
No ads during play β€” distraction-free solving
Free to play, no registration required

Select Your Challenge Level

Choose a Sudoku difficulty based on clue count. Levels are grouped by skill β€” from easy to expert gold.

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.

Medium Sudoku

Level 7
30 clues Level 8
29 clues

Ideal for intermediate players seeking a balanced challenge.

Hard Sudoku

Level 9
28 clues Level 10
27 clues

Great for advanced players, these puzzles reduce the clues further for deeper thinking.

Expert Sudoku

Level 11
26 clues Level 12
25 clues

For seasoned solvers. Requires advanced strategy and logical precision.

Expert – Silver

Level 13
24 clues Level 14
23 clues Level 15
22 clues Level 16
21 clues Level 17
20 clues

Minimal clues for a real mental workout β€” designed for puzzle masters.

Expert – Gold

Level 18
19 clues Level 19
18 clues Level 20
17 clues

The ultimate test. Only for elite Sudoku solvers. Every move counts.

FAQs About 9x9 Levels

How are levels determined?
Each level corresponds to the number of given clues. Fewer clues = harder puzzle.
Are puzzles ever repeated?
No. Every puzzle is unique and selected randomly from a handcrafted database.
Can I print or share puzzles?
Yes. Visit our Printable section to export any level's puzzles in Word format.