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
Welcome to Killer Sudoku - a logic puzzle with very simple rules and challenging solutions All Puzzles February 8 February 7 February 6 February 5 February 4 February 3 February 2 February 1 January 31 January 30. Random. An online game of logic, Sudoku doesn’t require any calculation nor special math skills; all that is needed are brains and concentration. How to play Sudoku. The goal of Sudoku is to fill in a 9×9 grid with digits so that each column, row, and 3×3 section contain the numbers between 1 to 9. At the beginning of the game, the 9×9 grid will.
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.
My new series of Killer Sudoku books, available in 4-per-page and Large Print 1-per-page formats, are now available on Amazon.
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Killer Sudoku Online Archive
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)
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)
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)
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)
Killer Sudoku Online Daily
Prefer to donate by mail or Venmo? Here's how.
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.
Killer Sudoku Online 2010
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)