Logic Masters Deutschland e.V.

Rules:
Sudoku: Place the digits 1-9 into each row, column and box without repeats.
Ambiguous XV/Kropki pairs:The grid is cluttered with 4 differently coloured dots. The 4 colours represent the 4 constraints of White Kropki, Black Kropki, V and X clues. Which colour represents which constraint must be deduced by the solver.
Constraint Quads: A constraint appearing in a quad circle must obey the following rules:
1) If the constraint quad is placed at the corner of a cell border, the constraints in the quad must be placed into at least one of the four surrounding cell borders.
2) If the constraint quad is placed at the edge of a cell border, the cells across the border edge must satisfy the constraint(s) given in that quad.
3) A gray dot can replace any color.

Detailed Constraint Explanations:
White Kropki: Digits along a white kropki clue must be consecutive.
Black Kropki: Digits along a black kropki clue are in a 1:2 ratio.
V: Digits along a V clue must sum to 5.
X: Digits along a X clue must sum to 10.

Puzzle Links: I have created versions for both colors and letters for the ciphered constraints. Answer check enabled for CTC versions.
Candy Corner - Letter version - F-Puzzles
Candy Corner - Letter version - CTC
Candy Corner - Color version - F-Puzzles
Candy Corner - Color version - CTC