Nabnerman Whispers
- Kropki dots
- Whisper lines
- Nabner 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.
- German Whispers: Adjacent digits on a green line must have a difference of at least 5.
- Nabner Lines: The yellow lines are Nabner Lines, i.e. on such a line there may not be consecutive or repeated digits. For example, if a 5 lies on a Nabner line, this line may not contain another 5 and neither a 4 nor a 6.
- Kropki: Digits joined by a black dot are in a 1:2 ratio. (Not all dots are given.)