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Printable Sudoku
Twelve original 9×9 Sudoku, four at each of our three levels, ready to print one or four to a page. Every puzzle has one solution, reachable by logic, and its answer is in a separate key with the same id.
- 12 puzzles: 4 Gentle, 4 Moderate, 4 Tough
- A4 and US Letter
- Answers in their own file
- Ids S-G1 to S-T4
What’s in the pack
One per page, the grid is 15 cm square with 24 pt digits: room to pencil in candidates. Four per page, each grid is 8.4 cm with 14 pt digits. The answer key prints six answers per page.
| Id | Level | Givens | Beyond singles, our solver needed |
|---|---|---|---|
| S-G1 | Gentle | 34 | nothing: singles only |
| S-G2 | Gentle | 34 | nothing: singles only |
| S-G3 | Gentle | 34 | nothing: singles only |
| S-G4 | Gentle | 34 | nothing: singles only |
| S-M1 | Moderate | 28 | Hidden pair |
| S-M2 | Moderate | 28 | Pointing pair |
| S-M3 | Moderate | 28 | Pointing pair |
| S-M4 | Moderate | 28 | Pointing pair ×2 |
| S-T1 | Tough | 26 | XY-wing |
| S-T2 | Tough | 28 | XY-wing |
| S-T3 | Tough | 24 | XY-wing |
| S-T4 | Tough | 26 | XY-wing ×2 |
The levels
Gentle
Singles are enough: find the one cell where a digit fits, or the one digit a cell can take.
Moderate
Needs pairs, pointing pairs or box/line reductions as well as singles.
Tough
Needs at least one advanced step: an X-wing, XY-wing, swordfish or triple.
How to play and print
The rule
Fill every empty square so that each row, each column and each 3×3 box holds the digits 1 to 9 once. The givens never move. Each puzzle has one solution, and you can reach it by reasoning, without guessing.
Getting started
Look for a row, column or box that is nearly full, or a digit that already appears often. Pencil small candidates into the corners of a cell when you are not sure yet.
Printing
Choose the PDF for your paper and print at 100% (“Actual size”), portrait. The sheets are black on white and print well in greyscale. The answer key is a separate file, so you can hand out puzzles without the answers.
Using the sheets
Free to print for personal, classroom and library use. Please don’t sell or republish the sheets. No sign-up, no email: the links above are the files. Each sheet carries its id, so a class can check answers by id.