Tiptoe
- Killer cages
- Whisper lines
- Entropic lines
The brief
- Normal sudoku rules apply, i.e. each row, column and 3x3 box has to contain the digits from 1 to 9 once each.
- Killer cages: Digits in a cage sum to the clue in the top left.
- German Whispers: Adjacent digits on a green line must differ by at least 5.
- Entropic Lines: Every set of three adjacent digits on an orange line must include a low digit (1, 2, 3), a medium digit (4, 5, 6), and a high digit (7, 8, 9).