Medium Sudoku Online
The sweet spot — challenging enough to engage, easy enough to finish. Free, freshly generated every time.
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Play ad-free — track every solveMedium 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 Sudoku247 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.