Medium Sudoku Online
The sweet spot — challenging enough to engage, easy enough to finish. Free, freshly generated every time.
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All-TimeMedium sudoku strikes the perfect balance between challenge and satisfaction. With fewer starting numbers than easy puzzles, you'll need to think more carefully about each placement — but the logic is still clean and approachable. Most solvers can complete a medium puzzle in 10 to 20 minutes, making it an ideal daily brain workout. Medium is where most players spend the majority of their time, developing the core techniques that unlock harder difficulties. You'll start spotting patterns, using elimination more confidently, and building the solving instincts that come with regular practice. Every puzzle on Sudoku247Online is freshly generated and verified solvable — no guessing required. Feeling warmed up? Try hard difficulty. Looking to practise your technique? Our strategy guides cover everything you need, including the X-Wing technique for clearing candidates when basic elimination stalls.
What makes a sudoku medium difficulty?
A medium sudoku is the balanced sweet spot — the tier where pure scanning stops being enough but advanced patterns aren't required yet. Each grid starts with about 30 to 34 given numbers, fewer than an easy puzzle, so you can't always place the next digit at a glance. This is where you start writing pencil marks and using basic elimination: noting which digits a cell can still take, then ruling some out as you fill the board. Nothing here demands an X-Wing or a chain — just careful, confident logic. Every medium puzzle still has one solution you can reach without ever guessing.
How to get better at sudoku with medium puzzles
The fastest way to get better at sudoku is to practise at medium, because it's the tier that teaches real technique without overwhelming you. Get comfortable with pencil marks first — list every candidate a cell can take, then watch the eliminations cascade. From there, learn to spot naked pairs, where two cells in a house share the same two candidates, so those digits can be ruled out of every other cell in that house. Then add hidden pairs, the same idea spotted from the other direction. Master confident elimination at medium and you'll find hard puzzles open up far more easily — the pairs you practise here are exactly what unlock the next tier.
Medium vs Hard: when you're ready to level up
Medium sudoku is the tier where solving instinct gets built, and hard is the natural next rung once that instinct is steady. When your 10-to-20-minute medium solves start feeling routine — when you spot naked pairs and place candidates without second-guessing — you're ready to step up. Hard sudoku drops to about 22 to 26 givens and leans on pointing pairs and the occasional X-Wing, the techniques that medium quietly prepares you for. There's no rush: plenty of solvers happily live at medium for the daily workout. But when you want more bite, hard is waiting one step up.
Medium sudoku questions
How hard is medium sudoku?
Medium sudoku sits right between easy and hard. Each grid starts with about 30 to 34 given numbers — fewer than an easy puzzle, so scanning alone won't finish it, but you won't need advanced patterns either. Pencil marks, basic elimination, and the occasional naked or hidden pair carry most medium solves. Plan on 10 to 20 minutes, and rest assured every puzzle has one solution you can reach by pure logic.
What techniques do you need for medium sudoku?
Medium sudoku asks for the building-block techniques: scanning each row, column, and box; writing pencil marks to track candidates; basic elimination; and naked or hidden pairs when a cell won't resolve on its own. You don't need X-Wing, Swordfish, or any chain logic at this tier — those belong to hard and above. Getting confident with pairs and elimination here is exactly what prepares you for the harder difficulties.
How do I get better at sudoku?
The most reliable way to improve is steady practice at medium difficulty. It's the tier that builds real solving instinct: you learn to write pencil marks, eliminate candidates confidently, and recognise naked and hidden pairs. Once those moves feel automatic, step up to hard, where pointing pairs and the occasional X-Wing take over. Our strategy guides walk through each technique with worked examples if you'd like to practise a specific move.
How long does a medium sudoku take?
Most solvers finish a medium 9×9 in 10 to 20 minutes. With about 30 to 34 givens, you'll place a handful of digits by scanning, then slow down and lean on pencil marks and elimination for the rest. It's quick enough for a coffee break but meaty enough to keep your logic engaged — which is exactly why medium is where so many players spend their time.
Are these medium sudoku puzzles free?
Yes — every medium sudoku on Sudoku247Online is free, freshly generated each time you play, and guaranteed solvable by pure logic with one unique solution. There's nothing to download and no sign-up to start. Create a free account if you'd like to play ad-free, earn XP, and save your solve times to the leaderboard.
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