Play Medium Sudoku Online
Medium Sudoku is where the game opens up. Simple scanning gets you started, but finishing usually means jotting pencil-mark candidates and using techniques like naked pairs and pointing pairs. It is the ideal level once easy puzzles feel automatic. Play unlimited free medium Sudoku in your browser — no signup required.
No signup · unlimited puzzles · works on any device
What to expect
- A genuine step up from easy — rewards pencil marks and pairs
- Great for practising naked pairs, hidden pairs, and box/line reduction
- Unlimited free puzzles, playable instantly with no account
- Built-in notes, mistake tracking, and logical hints when you get stuck
Frequently asked questions
- What is the difference between easy and medium Sudoku?
- Easy puzzles can be finished with basic scanning. Medium puzzles usually require pencil marks and simple techniques such as naked pairs or pointing pairs to break through.
- Should I use pencil marks on medium Sudoku?
- Yes. Once scanning stalls, pencilling in the candidates for each empty cell is the fastest way to spot pairs and other patterns that solve medium puzzles.
More ways to play
easy Sudoku
Great for learning the basics before you level up.
hard SudokuFor solvers who want a real logical test.
Daily ChallengeOne hard puzzle a day, ranked against every other player. Build a streak.
New to the game? Read our beginner’s guide to Sudoku.