Fair and square
- Killer cages
- Whisper lines
The brief
- Normal sudoku rules apply, i.e. each row, column and 3x3 region 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 have a difference of at least 5.