Ringing Alarm
- Killer cages
- Whisper lines
- Renban lines
The brief
Standard suduko rules apply: each row, column, and 3x3 box must contain all the digits from 1 to 9. Killer cages: digits in cages must not repeat, and must sum to the value in the corner. Renban: each purple line must contain a non-repeating set of consecutive digits, in any order. German whisper: adjacent digits on a green line must differ by at least 5.