Killer Sudoku Puzzles

 
Killer Sudokus are a kind of hybrid puzzle 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, called cages, which also contain a set of non-repeating digits. If you add up the digits in a cage, you get the sum shown in its clue.

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

Want to save some trees? Try the online version of these puzzles.

Need a cheat sheet? Print out this one-sheet of candidate cage sets which makes it easier to eliminate numbers.

Select a difficulty level:

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.
Intermediate Volume 1
Intermediate Volume 2
Intermediate Volume 3
Intermediate Volume 4
Intermediate Volume 5
Intermediate Volume 6
Intermediate Volume 7
Tough puzzles require more advanced Sudoku strategy, such as X-Wing, XY-Wing and Swordfish.
Tough Volume 1
Tough Volume 2
Tough Volume 3
Tough Volume 4
Tough Volume 5
Tough Volume 6
Tough Volume 7
These are the toughest Killer Sudokus I make, and may require a little trial-and-error to finish.
Super-Tough Volume 1
Super-Tough Volume 2
Super-Tough Volume 3
Super-Tough Volume 4
Super-Tough Volume 5
Super-Tough Volume 6
Super-Tough Volume 7

How to use the hints

My puzzles contain a page of hints in addition to a page of answers.

The hints are puzzles grids that contain numbers showing the order in which the squares were solved by the computer. Although this is not necessarily the order you would solve the puzzle, it's probably pretty close.

Follow the numbered squares in order 1,2,3,4,5... until you find a square you haven't solved yet. This square (or the one or two immediately after it) is a good candidate to solve next.

All puzzles ©2005-2013 KrazyDad.com. Feel free to reproduce the puzzles for personal, church, or school use. If you would like to purchase new puzzles for a book or periodical, contact me at dad@krazydad.com.