Vampire und ihre Opfer
- Whisper lines
The brief
Normal sudoku rules apply.
There are 9 VAMPIRES (digits 1-9 once each) in the graveyard (grid); one in every row, column and box. There are also 9 VICTIMS (digits 1-9 once each) in the graveyard; one in every row, column and box. The value of a vampire cell is the sum of its digit plus the digit of the victim cell in the same box. The value of a victim cell is always 0. The value of a natural cell is its digit.
Every coffin (cage) contains either a vampire or a victim. The total shown for each coffin is the sum of the two VALUES of the cells contained therein.
Along green lines, adjacent cells must have VALUES that differ by 5 or more.