Helium Neon GAS Lasers
- Killer cages
- Anti-knight
- Kropki dots
- Whisper lines
The brief
Normal Sudoku rules apply. Anti-Knight- The same number cannot be a chess knight's move away from each other. German Whisper Lines- Numbers on green lines are at least 5 apart from their neighbors on the line. Kropki Pairs- Numbers with a white dot between them are consecutive. Not all possible dots are given. Killer Cage- Numbers in the cage sum to the number in the top left corner of the cage.