What makes Level 9 challenging?

It provides 28 starting clues, offering a serious challenge.

How many Level 9 puzzles are available?

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

No account or download needed — simply click and solve.

Level 9 requires deeper analysis and multiple steps to solve, rewarding careful planning and pattern recognition.

Hard Sudoku with only 28–27 clues

Expect advanced solving techniques and fewer givens

No guesswork – just pure logic

Every grid reviewed by human and algorithm

Play and improve your solving speed

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 9 challenging?: It provides 28 starting clues, offering a serious challenge.
How many Level 9 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.