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Free Killer Sudoku Puzzles

Killer Sudokus are a kind of hybrid puzzzle that combine the best features of Sudoku and Kakuro (cross-sum) puzzles. Like a regular Sudoku, the rows, columns and 3x3 blocks contain the digits 1 thru 9. In addition, the dotted lines indicate areas which also contain a set of non-repeating digits. If you add up the digits in the dotted line area, you get the sums shown in the clues.

My Killer Sudoku puzzles are collected in 100 printable booklets per difficulty level. Within each section, the puzzles are also ordered by ascending difficulty. Each booklet contains eight puzzles, instructions, and answers.

Select a difficulty level:

Intermediate	These puzzles require basic Sudoku strategy and Kakuro strategy. If you have not solved Kakuro puzzles before, you will probably find them quite difficult at first.
Challenging	These puzzles require more sophisticated Sudoku strategy.
Tough	Tough puzzles require more advanced Sudoku strategy, such as X-Wing, XY-Wing and Swordfish.
Super Tough	These are the toughest Killer Sudokus I make, and may require a little trial-and-error to finish.

If you like these puzzles, be sure to check out my other puzzles too!.

Feel free to reproduce the puzzles for personal or school use. If you would like to publish these puzzles in a newspaper or book, or would like a larger or different selection of puzzles, contact me at dad@krazydad.com. Regular Sudoku and Kakuro puzzles are also available.

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