Play Medium Sudoku Online
A free medium Sudoku puzzle with 33 starting clues. Simple scanning will take you partway — then you will need notes and eliminations like naked pairs. Ideal once easy puzzles feel automatic.
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Scan with your iPhone cameraFrequently Asked Questions
What makes medium Sudoku harder than easy?+
Medium puzzles start with 33 clues instead of 43, so scanning alone stalls midway. You need to track candidates with notes and apply eliminations such as naked pairs and pointing pairs to finish.
How long does a medium Sudoku take to solve?+
Most regular players need 10 to 25 minutes for a medium puzzle. If you finish consistently under 10 minutes, you are ready for hard.
What techniques should I know for medium Sudoku?+
Use the notes feature to track candidates, then look for naked pairs (two cells sharing the same two candidates) and pointing pairs (a candidate confined to one line within a box). Those two techniques crack most medium puzzles.