4 Calling Birds
by Will Power
- Killer cages
- Kropki dots
- Whisper lines
- Entropic lines
- Renban lines
The brief
Normal Sudoku rules apply. RENBAN (3 birds' bodies)- Numbers on purple lines are each a set of non-repeating, consecutive numbers, in any order. DUTCH WHISPERS (birds' beaks)- Numbers on red lines are at least 4 apart from their neighbors on the line. ENTROPY LINE (1 bird's body)- Each continuous set of three numbers on a blue line contains one low digit (1-3), one middle digit (4-6) and one high digit (7-9). Numbers do not repeat on red or blue lines. KILLER- Numbers in cages sum to the number in the top left corner of the cage. KROPKI PAIRS- Numbers with a black dot between them are in a ratio of 2:1. Not all possible dots are given.
