Normal sudoku rules apply. There are 9 VAMPIRES (digits 1-9 once each) in the grid; one in every row, column and box. There are also 9 VICTIMS (digits 1-9 once each) in the grid; 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 cage contains either a vampire or a victim. The total shown for each cage is the sum of the two VALUES of the cells contained therein. Along a green line, adjacent cells must have VALUES that differ by 5 or more.