Oil, Water, Whisper
- Killer cages
- Whisper lines
- Oil and water cages
The brief
Normal sudoku rules apply.
Adjacent digits along the green line must differ by at least 5.
Digits in cages do not repeat and must sum to the small clue, if given.
Each cage is either full of "oil" (even digits), full of "water" (odd digits), or a mix of both. In all cases, each "row" within a cage is of just one type (oil or water). Oil floats on water, so even digits will always be in rows above odd digits in mixed cages.