Three Color Theorem
- Killer cages
- Kropki dots
The brief
Normal Sudoku rules apply.
KILLER CAGES(+)- Numbers in cages sum to the number in the top left corner of the cage (if given). The center cell of ALL cages has an interesting property that must be determined by the solver. Numbers may not repeat in cages.
KROPKI PAIRS- Numbers with a black dot between them are in a ratio of 2:1. Not all possible dots are given.