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Blog  |   Puzzles  |   Books  |   About  |    🔍 

2024-September 🍁 Happy Autumn! 🍂

Hey look! New puzzle varieties:

Enjoy!


Killer Sudoku Puzzles

Killer Sudoku (also called Sum Sudoku) 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 (book 100 is harder than book 1, but book 1 volume 9 is about the same as book 1, volume 1). 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.

I have several Killer Sudoku books available on Amazon, in 4-per-page and LARGE PRINT 1-per-page formats. You can learn more about them, and my other books, in my new puzzle book catalog.

Merry Christmas!


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.


Volume 1 (1-per-page)  (4-per-page) 
Volume 2 (1-per-page)  (4-per-page) 
Volume 3 (1-per-page)  (4-per-page) 
Volume 4 (1-per-page)  (4-per-page) 
Volume 5 (1-per-page)  (4-per-page) 
Volume 6 (1-per-page)  (4-per-page) 
Volume 7 (1-per-page)  (4-per-page) 
Volume 8 (1-per-page)  (4-per-page) 
Volume 9 (1-per-page)  (4-per-page) 
Volume 10 (1-per-page)  (4-per-page) 
Volume 11 (1-per-page)  (4-per-page) 
Volume 12 (1-per-page)  (4-per-page) 
Volume 13 (1-per-page)  (4-per-page) 
Volume 14 (1-per-page)  (4-per-page) 
Volume 15 (1-per-page)  (4-per-page) 
Volume 16 (1-per-page)  (4-per-page) 
Volume 17 (1-per-page)  (4-per-page) 
Volume 18 (1-per-page)  (4-per-page) 
Volume 19 (1-per-page)  (4-per-page) 
Volume 20 (1-per-page)  (4-per-page) 
Volume 21 (1-per-page)  (4-per-page) 
Volume 22 (1-per-page)  (4-per-page) 
Volume 23 (1-per-page)  (4-per-page) 
Volume 24 (1-per-page)  (4-per-page) 
Volume 25 (1-per-page)  (4-per-page) 
Volume 26 (1-per-page)  (4-per-page) 
Volume 27 (1-per-page)  (4-per-page) 
Volume 28 (1-per-page)  (4-per-page) 
Volume 29 (1-per-page)  (4-per-page) 
Volume 30 (1-per-page)  (4-per-page) 

Challenging

These puzzles require more sophisticated Sudoku strategy.


Volume 1 (1-per-page)  (4-per-page) 
Volume 2 (1-per-page)  (4-per-page) 
Volume 3 (1-per-page)  (4-per-page) 
Volume 4 (1-per-page)  (4-per-page) 
Volume 5 (1-per-page)  (4-per-page) 
Volume 6 (1-per-page)  (4-per-page) 
Volume 7 (1-per-page)  (4-per-page) 
Volume 8 (1-per-page)  (4-per-page) 
Volume 9 (1-per-page)  (4-per-page) 
Volume 10 (1-per-page)  (4-per-page) 
Volume 11 (1-per-page)  (4-per-page) 
Volume 12 (1-per-page)  (4-per-page) 
Volume 13 (1-per-page)  (4-per-page) 
Volume 14 (1-per-page)  (4-per-page) 
Volume 15 (1-per-page)  (4-per-page) 
Volume 16 (1-per-page)  (4-per-page) 
Volume 17 (1-per-page)  (4-per-page) 
Volume 18 (1-per-page)  (4-per-page) 
Volume 19 (1-per-page)  (4-per-page) 
Volume 20 (1-per-page)  (4-per-page) 
Volume 21 (1-per-page)  (4-per-page) 
Volume 22 (1-per-page)  (4-per-page) 
Volume 23 (1-per-page)  (4-per-page) 
Volume 24 (1-per-page)  (4-per-page) 
Volume 25 (1-per-page)  (4-per-page) 
Volume 26 (1-per-page)  (4-per-page) 
Volume 27 (1-per-page)  (4-per-page) 
Volume 28 (1-per-page)  (4-per-page) 
Volume 29 (1-per-page)  (4-per-page) 
Volume 30 (1-per-page)  (4-per-page) 

Tough

Tough puzzles require more advanced Sudoku strategy, such as X-Wing, XY-Wing and Swordfish.


Volume 1 (1-per-page)  (4-per-page) 
Volume 2 (1-per-page)  (4-per-page) 
Volume 3 (1-per-page)  (4-per-page) 
Volume 4 (1-per-page)  (4-per-page) 
Volume 5 (1-per-page)  (4-per-page) 
Volume 6 (1-per-page)  (4-per-page) 
Volume 7 (1-per-page)  (4-per-page) 
Volume 8 (1-per-page)  (4-per-page) 
Volume 9 (1-per-page)  (4-per-page) 
Volume 10 (1-per-page)  (4-per-page) 
Volume 11 (1-per-page)  (4-per-page) 
Volume 12 (1-per-page)  (4-per-page) 
Volume 13 (1-per-page)  (4-per-page) 
Volume 14 (1-per-page)  (4-per-page) 
Volume 15 (1-per-page)  (4-per-page) 
Volume 16 (1-per-page)  (4-per-page) 
Volume 17 (1-per-page)  (4-per-page) 
Volume 18 (1-per-page)  (4-per-page) 
Volume 19 (1-per-page)  (4-per-page) 
Volume 20 (1-per-page)  (4-per-page) 
Volume 21 (1-per-page)  (4-per-page) 
Volume 22 (1-per-page)  (4-per-page) 
Volume 23 (1-per-page)  (4-per-page) 
Volume 24 (1-per-page)  (4-per-page) 
Volume 25 (1-per-page)  (4-per-page) 
Volume 26 (1-per-page)  (4-per-page) 
Volume 27 (1-per-page)  (4-per-page) 
Volume 28 (1-per-page)  (4-per-page) 
Volume 29 (1-per-page)  (4-per-page) 
Volume 30 (1-per-page)  (4-per-page) 

Super-Tough

These are the toughest Killer Sudokus I make, and may require a little trial-and-error to finish.


Volume 1 (1-per-page)  (4-per-page) 
Volume 2 (1-per-page)  (4-per-page) 
Volume 3 (1-per-page)  (4-per-page) 
Volume 4 (1-per-page)  (4-per-page) 
Volume 5 (1-per-page)  (4-per-page) 
Volume 6 (1-per-page)  (4-per-page) 
Volume 7 (1-per-page)  (4-per-page) 
Volume 8 (1-per-page)  (4-per-page) 
Volume 9 (1-per-page)  (4-per-page) 
Volume 10 (1-per-page)  (4-per-page) 
Volume 11 (1-per-page)  (4-per-page) 
Volume 12 (1-per-page)  (4-per-page) 
Volume 13 (1-per-page)  (4-per-page) 
Volume 14 (1-per-page)  (4-per-page) 
Volume 15 (1-per-page)  (4-per-page) 
Volume 16 (1-per-page)  (4-per-page) 
Volume 17 (1-per-page)  (4-per-page) 
Volume 18 (1-per-page)  (4-per-page) 
Volume 19 (1-per-page)  (4-per-page) 
Volume 20 (1-per-page)  (4-per-page) 
Volume 21 (1-per-page)  (4-per-page) 
Volume 22 (1-per-page)  (4-per-page) 
Volume 23 (1-per-page)  (4-per-page) 
Volume 24 (1-per-page)  (4-per-page) 
Volume 25 (1-per-page)  (4-per-page) 
Volume 26 (1-per-page)  (4-per-page) 
Volume 27 (1-per-page)  (4-per-page) 
Volume 28 (1-per-page)  (4-per-page) 
Volume 29 (1-per-page)  (4-per-page) 
Volume 30 (1-per-page)  (4-per-page) 


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Insane

Wait, didn't I just say the Super-Tough puzzles were the toughest I make? Well, I must be insane, because these new ones are actually even harder.


Volume 1 (1-per-page)  (4-per-page) 
Volume 2 (1-per-page)  (4-per-page) 
Volume 3 (1-per-page)  (4-per-page) 
Volume 4 (1-per-page)  (4-per-page) 
Volume 5 (1-per-page)  (4-per-page) 
Volume 6 (1-per-page)  (4-per-page) 
Volume 7 (1-per-page)  (4-per-page) 
Volume 8 (1-per-page)  (4-per-page) 
Volume 9 (1-per-page)  (4-per-page) 
Volume 10 (1-per-page)  (4-per-page) 
Volume 11 (1-per-page)  (4-per-page) 
Volume 12 (1-per-page)  (4-per-page) 
Volume 13 (1-per-page)  (4-per-page) 
Volume 14 (1-per-page)  (4-per-page) 
Volume 15 (1-per-page)  (4-per-page) 
Volume 16 (1-per-page)  (4-per-page) 
Volume 17 (1-per-page)  (4-per-page) 
Volume 18 (1-per-page)  (4-per-page) 
Volume 19 (1-per-page)  (4-per-page) 
Volume 20 (1-per-page)  (4-per-page) 
Volume 21 (1-per-page)  (4-per-page) 
Volume 22 (1-per-page)  (4-per-page) 
Volume 23 (1-per-page)  (4-per-page) 
Volume 24 (1-per-page)  (4-per-page) 
Volume 25 (1-per-page)  (4-per-page) 
Volume 26 (1-per-page)  (4-per-page) 
Volume 27 (1-per-page)  (4-per-page) 
Volume 28 (1-per-page)  (4-per-page) 
Volume 29 (1-per-page)  (4-per-page) 
Volume 30 (1-per-page)  (4-per-page) 

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 ©2005-2024 KrazyDad.com. Feel free to reproduce the puzzles for personal, church, school, hospital or institutional use. Please do not use my puzzles in for-profit publications without my permission. If you need free puzzles for your small circulation newspaper, or you would like to purchase puzzles for a book, periodical, app or website, contact me at dad@krazydad.com.

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