Techniques · killer sudoku

Forced Cage Splits

List every way the empty cells of a cage can make its total with different digits and their current candidates. A candidate used in none of them is ruled out.

In the walkthroughs, every Forced Cage Splits step shades the cells of the pattern and names the cell and digit it proves, so you can see the move on the grid rather than read about it. Press “Skip to next hard step” to jump straight to it.

None of the walkthroughs published so far needs this one; it is here for completeness.

Where it sits

See the whole ladder on hard killer sudoku techniques, or look a puzzle up by number under solutions.