Printable Hard 9×9 Sudoku (4 per page)
Print free hard 9×9 sudoku — a proper logic workout with fewer clues to start from. Hard grids ask for techniques like naked and hidden pairs and pointing pairs, so expect to slow down, take notes and earn the solve. Every puzzle still has exactly one fair answer. Print it now or save the PDF.
About this Hard 9×9 sheet
Hard sudoku gives you a leaner starting grid, so you'll reach for intermediate techniques: naked pairs, hidden pairs and pointing pairs that let you eliminate candidates a square at a time. Pencil marks become your friend here. It's a proper challenge that rewards patience over speed — and every grid still has one fair, logic-only solution. Want a step down? Medium is friendlier.
Four puzzles per page packs a small batch onto one sheet — ideal for a day's worth of solving, a road trip or a stack to keep by the kettle. The grids are a touch smaller, so it suits solvers who don't need a lot of writing room. It prints cleanly on both A4 and US Letter, straight from your browser or as a saved PDF. Turn solutions on first if you want the answer key.
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Frequently asked questions
- How many sudoku fit on a 4-per-page sheet?
- Four Hard 9×9 grids per page — a handy small batch for a trip or a few days of solving. The grids are a little smaller; the sheet prints to A4 and US Letter alike.
- What techniques do hard sudoku need?
- Hard 9×9 sudoku typically calls for naked pairs, hidden pairs and pointing pairs to eliminate candidates. Pencil marks help a lot, and every grid still has one logic-only solution.
- Can I print the answers too?
- Yes. Toggle solutions on before you print or save the PDF, and the answer key prints alongside your puzzles. Leave it off for a clean sheet — it's free either way, no sign-up.
How to solve these
New to a technique? Read the step-by-step rules and solving guides.
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