Logic Masters Deutschland e.V.

This puzzle uses a negative constraint on both arrows and German whisper lines, which gives some interesting logic that I don't think I've seen before. Hope you enjoy :)

Links to play:

Cracking the Cryptic

F-Puzzles

Rules:

Normal sudoku rules apply: Each digit 1 to 9 appears exactly once in each row, column and box.

XV sudoku: Cells separated by an X sum to 10. Cells separated by a V sum to 5. Not all possible X's and V's are given.

Arrow sudoku: Digits along an arrow sum to the digit in that arrow's circle. In each of boxes 2 (top), 6 (right) and 7 (bottom left), there are no possible two-cell arrows contained entirely within that box. For example, in these boxes it is impossible to place the digits 2, 5 and 7 in the same 2x2 in any configuration, as an arrow would be formed from the 7 to the 2 and 5.

German whisper lines: Neighbouring digits on a green line differ by at least 5. The two German whispers lines in each of boxes 1 (top left) and 5 (centre) are the only possible German whispers lines contained entirely within these boxes (any digits within these boxes not connected by a line cannot differ by 5 or more).