Techniques · killer sudoku

Cage Min/Max Bounds

The other cells of the cage cannot add up to enough (or are already too much) whichever digits they take, so this candidate cannot make the total.

In the walkthroughs, every Cage Min/Max Bounds 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.