Difficulty · Medium
Medium Sudoku — Free Intermediate Puzzles
Medium Sudoku is the sweet spot: fewer starting clues than easy, but still solvable by anyone comfortable with hidden singles and basic notes. Unlimited free puzzles, playable on any device.
30–35 starting clues — real thinking, no dead ends.
Optional Auto-notes if you don't want to pencil manually.
Undo, hint, and check-progress tools built in.
Times tracked on the leaderboard when signed in.
Techniques you'll use
Hidden singles, naked pairs, and simple scanning are enough for every medium puzzle. Save X-Wing and Swordfish for Hard and Evil.
Ready for the next step?
When medium puzzles feel routine, try Hard Sudoku. It's where notes become essential and box-line reduction starts to matter.
Frequently asked questions
What makes a Sudoku puzzle medium?
Medium Sudoku puzzles start with roughly 30–35 given digits. You'll need to pencil in notes and use hidden singles, but no advanced strategies are required.
Do I need notes to solve medium Sudoku?
Notes (candidates) help. Turn on Notes mode from the toolbar, or enable Auto-notes per game to have SodokuDX pencil in candidates for you.