Terminology
- Cell
- A single square that contains one number in the grid
- Row
- A horizontal line of 9 cells
- Column
- A vertical line of 9 cells
- Nonet
- A 3×3 grid of cells, as outlined by the bolder lines in the diagram above
- Cage
- The grouping of cells denoted by a dotted line or by individual colours.
- House
- Any nonrepeating set of 9 cells: can be used as a general term for "row, column, or nonet" (or, in Killer X variants, "long diagonal")
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