Logic Masters Deutschland e.V.

Since there are now several types of modifiers called "Vampires", I have renamed one of them. The suggestion for the name "Nosferatu" came from ViKingPrime.
If you enjoy puzzles with this particular ruleset, you will find a link under the picture that will hopefully soon lead to a list of all corresponding puzzles.

Rules:

Sudoku: Fill every row, column and marked 3x3 box with the digits 1-9.

Nosferatu: Nine cells in the grid are Nosferatu cells. They have to be filled with a complete set of the digits from 1-9. Each row, column and marked 3x3 box contains exactly one Nosferatu cell.
There also are nine Prey cells following the same rules as the Nosferatu cells. A cell can only have one of these roles.
A Nosferatu cell sucks off the Prey cell in the same marked 3x3 box. Therefore the value of a Prey cell is 0 and the value of a Nosferatu cell is the sum of the digits in the Nosferatu cell and the Prey cell in the same marked 3x3 box.

7-Whisper: The values of adjacent cells along the red lines have to differ by at least 7.

Have fun solving!

Sudoku on:
SudokuPad

Various puzzles were created by different authors using this ruleset. I suggested the authors mention the name "Nosferatu" on their puzzles page. Once this has happened, the puzzles can be found using the following search: https://logic-masters.de/Raetselportal/Suche/erweitert.php?skname=x&sktext=x&suchtext=Nosferatu