Prime Cages
- Killer cages
- Kropki dots
- Whisper lines
The brief
Normal sudoku rules apply. Place the digits 1-8 once each in every row, column and 2x4 box. Digits in a dotted cage without repeat sum to the total given in the top left corner of the cage. Adjacent digits along a green line must differ by at least 4. Cells separated by a black dot has one digit double the other (1:2 ratio).