ThePuzzleLabs

Free printable killer sudoku worksheets

185 print-ready PDF packs across five difficulty levels — 8 puzzles per pack with cage outlines, sum labels, and a full answer key on the last page. Download and print. No signup, no ads.

Easy killer sudoku

Larger cages and gentler sums. A good entry point to cage-based logic.

Pack 01Pack 02Pack 03Pack 04Pack 05Pack 06Pack 07Pack 08Pack 09Pack 10Pack 11Pack 12Pack 13Pack 14Pack 15Pack 16Pack 17Pack 18Pack 19Pack 20Pack 21Pack 22Pack 23Pack 24Pack 25Pack 26Pack 27Pack 28Pack 29Pack 30Pack 31Pack 32Pack 33Pack 34Pack 35Pack 36Pack 37

Medium killer sudoku

Smaller cages and tighter sums. Standard arithmetic reasoning required.

Pack 01Pack 02Pack 03Pack 04Pack 05Pack 06Pack 07Pack 08Pack 09Pack 10Pack 11Pack 12Pack 13Pack 14Pack 15Pack 16Pack 17Pack 18Pack 19Pack 20Pack 21Pack 22Pack 23Pack 24Pack 25Pack 26Pack 27Pack 28Pack 29Pack 30Pack 31Pack 32Pack 33Pack 34Pack 35Pack 36Pack 37

Hard killer sudoku

Many small cages with overlapping constraints. Advanced cage-sum techniques.

Pack 01Pack 02Pack 03Pack 04Pack 05Pack 06Pack 07Pack 08Pack 09Pack 10Pack 11Pack 12Pack 13Pack 14Pack 15Pack 16Pack 17Pack 18Pack 19Pack 20Pack 21Pack 22Pack 23Pack 24Pack 25Pack 26Pack 27Pack 28Pack 29Pack 30Pack 31Pack 32Pack 33Pack 34Pack 35Pack 36Pack 37

Expert killer sudoku

Tightly packed cages, frequent uniqueness traps, and minimal given digits.

Pack 01Pack 02Pack 03Pack 04Pack 05Pack 06Pack 07Pack 08Pack 09Pack 10Pack 11Pack 12Pack 13Pack 14Pack 15Pack 16Pack 17Pack 18Pack 19Pack 20Pack 21Pack 22Pack 23Pack 24Pack 25Pack 26Pack 27Pack 28Pack 29Pack 30Pack 31Pack 32Pack 33Pack 34Pack 35Pack 36Pack 37

Einstein killer sudoku

The hardest tier. Long chains of cage-sum deductions and innies-and-outies logic.

Pack 01Pack 02Pack 03Pack 04Pack 05Pack 06Pack 07Pack 08Pack 09Pack 10Pack 11Pack 12Pack 13Pack 14Pack 15Pack 16Pack 17Pack 18Pack 19Pack 20Pack 21Pack 22Pack 23Pack 24Pack 25Pack 26Pack 27Pack 28Pack 29Pack 30Pack 31Pack 32Pack 33Pack 34Pack 35Pack 36Pack 37

About these worksheets

Each PDF is three pages: two pages of puzzle grids (four per page, with cage outlines drawn as dashed boundaries and sum labels in the top-left corner of each cage) followed by a full answer key. All puzzles are computer-verified to have a unique solution.

Packs are numbered sequentially within each difficulty. Pack 01 contains puzzles 1–8, Pack 02 contains puzzles 9–16, and so on up to Pack 37 (puzzles 289–296). Each difficulty has 300 distinct puzzles total.

If you'd rather solve interactively, play online with hints, pencil marks, and step-by-step solutions. Or read the killer sudoku rules guide to learn cage-sum strategy.