Printable Hard 9×9 Sudoku (6 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.
Six puzzles per page is our most paper-friendly layout: a full sheet of grids for batch printing, classrooms or building your own little puzzle pack. The grids are compact, so it's best for confident solvers who write small. It prints tidily on both A4 and US Letter, and you can save it as a PDF to print a whole booklet at once. Switch solutions on before printing for an instant answer sheet.
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Frequently asked questions
- Can I print a batch of sudoku at once?
- Yes — this 6-per-page sheet packs six Hard 9×9 grids onto one page, perfect for classrooms or your own puzzle pack. The grids are compact and print to 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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