SudokuFewer starting points
Medium puzzles begin with 36 filled cells. Openings are rarer, so you need to scan the whole grid instead of one obvious area.
THE NEXT STEP
Medium Sudoku Puzzles
Free medium Sudoku with 36 clues. Fewer starting points, still solvable with pure logic.
MEDIUM LEVEL
Room to think.
A moment to pause.
Your puzzle will be right here.
Puzzle progress0%
1–9 to fill · Shift+1–9 for notes · Arrows to move · Delete to erase
◇ No account needed✓ Always free to play◎ Made for your focus
MEDIUM SUDOKU
A real step up from Easy
Fewer clues, longer searches.
Still solvable with pure logic.
Hidden singles matter
Our solver confirms every Medium grid can be finished with naked and hidden singles. The difference is that hidden singles become essential, and they are harder to spot.
Time to settle in
Expect 10 to 20 minutes. If you get stuck, notes help you see where each digit can still go.
TECHNIQUES FOR MEDIUM
Try it now ↗How to solve a medium Sudoku
Hunt for hidden singles
Choose a box and a missing digit. If that digit fits in only one cell of the box, place it, even if the cell could hold other digits. Do the same for rows and columns.
Use notes on crowded areas
Press N (or tap Notes) and write the possible digits in a few cells. Shift plus a number adds a note directly. When you place a correct digit, Sudoku Prime removes it from the notes around it.
Work digit by digit
Count how many of each digit are placed. The number pad shows how many remain. Digits with only one or two left are usually the easiest to finish.
Never guess
Every Medium puzzle has a single solution reachable by logic. If nothing seems possible, scan again with a different digit before using a hint.
KEEP PLAYING
More free Sudoku puzzles
Daily SudokuOne shared puzzle a day.Easy Sudoku43 clues, perfect to start.Hard Sudoku30 clues, notes recommended.Expert SudokuAbout 25 clues, beyond singles.6×6 SudokuDigits 1 to 6, great for kids.Killer SudokuCages, sums, and pure logic.Sudoku SolverSolve any puzzle, step by step.Printable SudokuPrint or save as PDF.Sudoku StrategiesLearn every solving technique.
GOOD TO KNOWA little clarity
A little clarity
before you play.
The details, without the distractions.
What is the difference between easy and medium Sudoku?
Medium puzzles start with 36 clues instead of 43. They are still solvable with singles, but hidden singles become essential and harder to spot.
Do I need notes for medium Sudoku?
Not always, but notes help a lot. Press N or tap Notes, or use Shift plus a number to add a note directly.
Are the medium puzzles unlimited?
Yes. Every new puzzle is generated on the spot and checked to have exactly one solution.
Does the game save my progress?
Yes, when browser storage is available. Each difficulty and the Daily Sudoku keep their own saved game in this browser, so switching levels never erases your progress.