Printable Evil 9×9 Sudoku (2 per page)
Print free evil 9×9 sudoku — the hardest level we make, a pure-logic gauntlet with the bare minimum of clues. Evil grids demand the full toolbox of advanced techniques and real persistence, but they never need a guess: there's exactly one answer to earn. Print it instantly or save the PDF for a serious sitting, or play evil Sudoku online if you'd rather solve on screen.
About this Evil 9×9 sheet
Evil sudoku is the toughest grid we generate, built on the bare minimum of clues a sudoku can have. (No proper sudoku has fewer than 17 given numbers — that's a proven mathematical limit.) Expect to use the full set of advanced techniques and plenty of pencil marks, but never a guess: there's exactly one solution waiting. If it's too brutal, master and expert step it down a notch.
Two puzzles per page is the handy middle ground: bigger grids than a packed sheet, but two solves from a single page. It's great for sharing one printout between two people, or for getting a pair of puzzles without using much paper. The sheet is sized for both A4 and US Letter and prints cleanly from any browser. Flip on the solutions before printing if you'd like the answers alongside.
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Frequently asked questions
- Can I print two sudoku puzzles on one page?
- Yes — this 2-per-page sheet puts two Evil 9×9 grids on a single page, so you can share one printout or get two solves while saving paper. It fits A4 and US Letter.
- How many clues does an evil sudoku have?
- Evil 9×9 sudoku uses close to the minimum number of clues. No proper sudoku can have fewer than 17 givens — a proven limit — so it leans on advanced techniques, never guessing.
- 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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