Medium Sudoku puzzle 18 is a moderate daily challenge designed for developing players. Use techniques like pointing, claiming and naked pairs to complete this 9×9 grid without guessing. Test your skills with this puzzle taken from the HeadScratcher Sudoku collection.
Medium Sudoku Puzzles
250 Large-Format Brain Teasers with Playing Tips and Solutions
- Intermediate-friendly: Designed for developing solvers.
- Learn by doing: All strategies explained with examples (includes Pointing, Claiming, Naked and Hidden Pairs).
- Get started fast: 50 puzzles include pre-filled candidate notes to show how pros set up a grid.
- Two puzzles per page: Spacious A4 pages leave plenty of room for neat pencil marks.
- Paper + online: Scan a QR code for every puzzle to play digitally at headscratcher.world.
- Solutions included: Complete solution grids for every puzzle.
New!
Now available: Medium Sudoku Puzzles Volume 2250 fresh medium puzzles, with the same clean two-per-page layout, starter notes, QR codes, and full solutions. If you enjoyed Volume 1, this is the perfect next step.
Frequently Asked Questions
How is a medium Sudoku different from an easy one?
Medium puzzles still use basic logic, but you’ll rely more on singles, pairs and simple candidate work. They’re designed to feel like a proper challenge without requiring expert-level strategies.
What techniques should I know for medium Sudoku?
You’ll benefit from understanding full house, naked and hidden singles, and be well versed in techniques like pointing and claiming. Candidate notes become more useful as the grid tightens.
How long does a medium Sudoku usually take?
Expect around 10–25 minutes, depending on experience. Some grids fall quickly, others require a bit more patience and pattern-spotting.
Are hints available for medium puzzles?
Yes. The hints system on HeadScratcher explains the logic behind each move, so you can learn while you solve instead of just revealing answers.
Are medium puzzles still logically solvable?
Absolutely. Every medium puzzle has a unique solution and can be solved step-by-step using logic, without guessing.