What makes Level 20 challenging?

It provides 17 starting clues, offering a serious challenge.

How many Level 20 puzzles are available?

Thousands. Each session randomly selects one from our verified collection.

No account or download needed — simply click and solve.

Level 20 Sudoku Puzzle with 17 clues – a handcrafted challenge designed for beginners and learners.

These are the top 10 solvers for this puzzle. Think you can beat them?

No results available for today.

Only 19–17 clues — nearly world-record minimal

Every cell demands logic, no assumptions allowed

Elite-level handcrafted puzzles for pros

Track your time, print puzzles, and share results

Challenge yourself with some of the hardest Sudoku online

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

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

Ideal for intermediate players seeking a balanced challenge.

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

For seasoned solvers. Requires advanced strategy and logical precision.

Minimal clues for a real mental workout — designed for puzzle masters.

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

What makes Level 20 challenging?: It provides 17 starting clues, offering a serious challenge.
How many Level 20 puzzles are available?: Thousands. Each session randomly selects one from our verified collection.
Do I need an account to play?: No account or download needed — simply click and solve.