Logic Masters Deutschland e.V.

Rules:

Irregular sudoku rules apply: Place the digits 1 through 9 in each empty cell. Digits must not repeat within the same row, column, or indicated region..

Normal Killer rules apply: Digits cannot repeat in cages, and sum to the number in the upper-left corner of the cage.

XV rules apply: Adjacent cells connected with an X must sum to 10. Adjacent cells connected with a V must sum to 5. Adjacent cells not connected with an X or V must not sum to 5 or 10


You can try this on F-puzzles or CTC