Printable Hard 9×9 Sudoku
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.
One puzzle per page gives each grid the whole sheet, with large cells and room to write your pencil marks in the margins. It's the most comfortable layout to solve on paper and the easiest on the eyes. Print straight from your browser or save the PDF — it's sized for both A4 and US Letter, so it prints clean wherever you are. Want answers? Toggle the solutions on before you print.
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Frequently asked questions
- How big is the puzzle on a one-per-page sheet?
- It fills the page — one large 9×9 grid with roomy cells, so it's comfortable to read and easy to write pencil marks into. It prints to fit both A4 and US Letter.
- 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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