Killer Sudoku Puzzles by Dr Gareth Moore

Killer Sudoku   Buy my book of 100 Killer Sudoku The rules of Killer Sudoku present a wicked twist on those of Sudoku, since you must not only place each of the numbers 1 to 9 into each of the rows, columns and bold-lined 3-by-3 boxes but you must also place the numbers in each dashed-line cage so that they add up to the given total. For example, the first two squares on the first row of the example puzzle on the right must add up to 7. You also cannot repeat a number within a cage, so this means for example that the solution to a cage with a total of'4' must always be 1 and 3, never 2 and 2 (although 2 and 2 would be disallowed by the standard rules of Sudoku in any case). There is only ever one possible solution, and it can always be reached via reasonable logical deduction. Guessing is never required. Solving Killer Sudoku can require a range of tactics - not only those from Sudoku and Kakuro, but also some methods unique to Killer Sudoku itself. I can supply Killer Sudoku puzzles at various puzzle sizes and at a range of difficulties, as well as in variations such as with diagonal X-regions or jigsaw shapes instead of the underlying 3x3 boxes - see the samples below for more details. All of my puzzles are either entirely hand-made or have significant manual input into the process. Choose from one of the following options: Play an interactive Killer Sudoku puzzle online now Get a book of Killer Sudoku puzzles to play offline Play a wide range of free puzzles online Obtain Killer Sudoku puzzles for your publication Also see these other Killer Sudoku varieties: (click for more information) Extra Regions Killer Killer Jigsaw Sudoku Killer Sudoku-X Some more puzzle types from Dr Gareth Moore - click on a puzzle to view further varieties: Futoshiki Hanjie Hashi Hitori Kakuro Masyu Nurikabe Samurai Sudoku Slitherlink Sudoku

Play Killer Sudoku Online Now! More Killer Sudoku samples: (click to enlarge) Easy Killer Sudoku Medium Killer Sudoku Hard Killer Sudoku Please note: all puzzles supplied for publication are in rescalable vector-format PDF format unless otherwise requested.