Cage

From Sudopedia
Revision as of 04:57, 31 May 2020 by Rooted (talk | contribs) (Created page with "A '''cage''' is the basic building-block of a Killer Sudoku puzzle. It is a set of contiguous cells, surrounded by a dotted outline or marked off with distinctive back...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigationJump to search

A cage is the basic building-block of a Killer Sudoku puzzle. It is a set of contiguous cells, surrounded by a dotted outline or marked off with distinctive background color. The cage is marked (usually in the top left corner) with a number which represents the sum of all the cells in the cage.

The highlighted part of this grid shows a cage with 4 cells and a sum of 26.

Cage.png

According to the Killer Convention, digits can only appear once in a cage, even if the normal Sudoku rules would allow this.

Through application of the 45 rule, a solver may create additional split cages or hidden cages that subdivide or overlap the original given cages of a puzzle. These cages will only follow the Killer Convention if their cells see each other.