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[[Image:KillerQ.png|right|400px|thumb|Example Killer Sudoku puzzle.]]
[[Image:KillerA.png|right|400px|thumb|Solution to the example puzzle.]]

'''Killer Sudoku''' is one of the most popular Sudoku [[Sudoku Variants|variants]]. The Japanese name for Killer is '''Samunamupure''', and it is also known as '''Sum-Sudoku'''.

The puzzle has no [[given]]s, but it has the same [[grid]] format as a standard Sudoku. This grid is covered by [[cage]]s, each of which enclose 2 or more [[cell]]s. The cages are usually marked with dotted outlines or with separate background colors. The top-left cell is labeled with a cage sum, which is the sum of all [[solution]] digits for the cells inside the cage. Unless otherwise stated, all Killer puzzles follow the [[Killer Convention]]: all digits in a cage should be distinct. In Killer nomenclature, the [[box]]es are often referred to as [[nonet]]s.

Besides the [[techniques]] that you can use for standard Sudoku, solving a Killer requires a whole new set of solving techniques. It is often useful to know the [[cage combinations]] for particular cage sums. As an example, a cage of 2 cells with a sum of 3 has only one possible combination: 1 or 2. See [[:Category:Killer Sudoku|this category]] for a list of Killer Sudoku techniques.

The Killer variant can be combined with the [[Jigsaw]] variant to form [[Jigsaw Killer]]s. It can also be combined with [[Sudoku-X]] to form [[Killer-X]].

== External Links ==
* [[Wikipedia:Killer sudoku|Wikipedia entry on Killer Sudoku]]
* [http://www.djape.net/sudoku/forum/viewtopic.php?t=280 Killer Sudoku Lingo]
* [http://jcbonsai.free.fr/sudoku/?page_id=3 Killer Lingo: Notation and Terminology]

[[Category:Killer Sudoku]]

Killer - Revision history

Rooted: Created page with "Example Killer Sudoku puzzle. Solution to the example puzzle. '''Killer Sudoku''' is one of th..."