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
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.