Question 1

How do pencil marks work?

Accepted Answer

Toggle pencil mode (or press P) then press a number to add/remove a small candidate note in the cell.

Question 2

What do the difficulties mean?

Accepted Answer

Easy: 36 cells removed. Medium: 46. Hard: 54. All puzzles are guaranteed to have a unique solution.

Question 3

Can I use keyboard?

Accepted Answer

Yes — arrow keys to navigate, 1-9 to place, Backspace to erase, P for pencil mode.

Question 4

How do I play Sudoku Puzzle Game Online Free – 3 Difficulty Levels online free?

Accepted Answer

Click Start and follow the on-screen steps. Use mouse, touch, or keyboard controls. No download needed.

Question 5

Can I play Sudoku Puzzle Game Online Free – 3 Difficulty Levels without downloading?

Accepted Answer

Yes. This Sudoku Puzzle Game Online Free – 3 Difficulty Levels runs in your browser with no install. Free on mobile and desktop.

Question 6

How do I use this Sudoku Puzzle Game Online Free – 3 Difficulty Levels online free?

Accepted Answer

Open the game above and press Start. Free with no login, works on mobile and desktop.