Champion's Mindset

"The more difficult the victory, the greater the happiness in winning." — Pelé

Champion's Mindset

Medium Sudoku Puzzles

Medium sudoku puzzles are a step up from easy — the same pure-logic solving, but with fewer starting clues that force you to think a little harder.

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Scientific Mind

"If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet." — Niels Bohr

Scientific Mind

About Medium Sudoku

Medium puzzles introduce the Hidden Single, where you scan from a digit's perspective to find the only cell in a row, column, or box where it can go. Elimination still solves every puzzle; you just need to look more carefully. This is the most important skill jump in sudoku.

Prefer paper? Download free printable medium sudoku (PDF) →

Techniques You'll Use

Medium puzzles are best solved with Naked Singles, Hidden Singles, and systematic scanning. Every puzzle on this page has a single, unique solution and can be solved by pure logic — no guessing required. Learn the methods step by step in our complete guide to solving strategies.

Frequently Asked Questions

Are these medium sudoku puzzles free?

Yes. Every medium sudoku puzzle here is free to play in your browser with no download and no registration. You can also print any puzzle for free.

Who are medium puzzles for?

Medium puzzles are best suited for players comfortable with the rules who want a balanced challenge.