Icicles
- Killer cages
- Region sum lines
- Whisper lines
- Renban lines
The brief
Normal sudoku rules apply.
Pink lines contain a set of consecutive digits in any order (Renban).
Adjacent digits along a green line must differ by at least 5 (German Whisper).
Blue lines have an equal sum N within each box they pass through (Region Sum).
Digits in cages must sum to the clue in the top left corner.