Logic Masters Deutschland e.V.

Normal Rules:

Normal Sudoku rules apply.

Dominoes with an X must sum to 10. Dominoes with a V must sum to 5. All X and V dominoes are given.

Digits along an arrow must sum to the digit in that arrow’s circle.

Extra Rules:

Divide the digits 1-9 into three different groups (such as 124,357,689). No digits from the same group may touch orthogonally. The 3 given bulbs / circles in column 7 are one group of digits. That will get you to two possible solutions - choose your own adventure!

To finally disambiguate to a unique solution, each group of digits must have at least one odd digit.

Links:

Play with SudokuMaker

Play with SudokuPad

Play with F Puzzles