Printable Killer Sudoku
Sudoku with a dash of arithmetic. There are no starting digits: instead, dotted cages show the total of the digits inside them. Every puzzle has exactly one solution and is checked to be solvable by reasoning.
Print puzzles 1–10 from this page
Answers come in their own PDF so you can keep them out of sight, or choose the combined booklet with the answers at the back.
- Killer Sudoku #0001
- Killer Sudoku #0002
- Killer Sudoku #0003
- Killer Sudoku #0004
- Killer Sudoku #0005
- Killer Sudoku #0006
- Killer Sudoku #0007
- Killer Sudoku #0008
- Killer Sudoku #0009
- Killer Sudoku #0010
How to play Killer Sudoku
The usual Sudoku rules apply: every row, column and 3×3 box contains 1 to 9 exactly once. On top of that, the digits in each dotted cage add up to the small total in its corner, and no digit repeats inside a cage.
Start with the cages that have only one possible combination: two cells totalling 3 must be 1 and 2; two cells totalling 17 must be 8 and 9; three cells totalling 6 must be 1, 2 and 3.
Then use the 45 rule. Every row, column and box adds up to 45, so if the cages wholly inside a box total 38, the box's remaining cells must add up to 7. It is the single most useful Killer technique.
How our levels differ
Easy puzzles use small cages of two or three cells and can be solved by combinations and elimination alone. Medium puzzles add four-cell cages. Hard puzzles use larger cages, up to five cells, and may need you to test a two- or three-way choice to see which one holds.
Printing tips
Every PDF is laid out for both A4 and US Letter. Choose “Actual size” or “100%” in your printer dialogue rather than “Fit to page” so grids stay square.
The puzzles are black on white with thin rules, so they print cleanly in greyscale and use very little ink. Answers come in a separate PDF, so you can print the puzzles now and keep the solutions for later.