Hard Sudoku Printables. Free PDF Downloads
Hard difficulty printables. Each puzzle requires pointing pairs, box-line reduction, and occasionally X-wing. Pencil mandatory.
- No signup
- No ads
- One-click PDF
- Free for classroom use
Every pack includes
- 20 unique puzzles · Hard
- Full solutions section at the back
- One puzzle per cover · clean black-and-white print
- A4 page size · prints on US Letter without clipping
- Compressed under 1 MB so it downloads in a second
- Free to share, free for classroom use
Made for
Experienced solvers ready for a real workout.
Prefer screen? Play this difficulty online.
Pick a pack, download, print
Every pack is a different set of 20 puzzles. Start with Pack 01 — or jump to whichever catches your eye.
Questions readers ask
How do I print this?
Download the PDF, open it in any reader and choose "Print." A4 is the native page size and US Letter prints cleanly too — set your printer to "fit to page" if it asks. Each pack is under 1 MB so the download is instant.
Where are the solutions?
Every Sudokly pack carries its solutions in a dedicated section at the back of the same PDF. No second file to download, no email gate to unlock them.
Can I share it with my class or my parents?
Yes. Every pack is free to share and free for classroom use. The only ask: keep the sudokly.com footer on each page so anyone who likes it can find more.
How hard are these puzzles?
Difficulty stays at hard across the whole pack — pick a different category for harder or easier puzzles.
Do I need to sign up or give an email?
No. The whole site is free with no signup. Every PDF downloads directly when you tap the button.