Logic Masters Deutschland e.V.

This puzzle is solved in two stages. In the first stage, boxes 1-7 are solved individually using the box number and its two successors as digits, e.g. box 5 contains the digits 5, 6 and 7. In every box, every digit appears only once in each row and column. In the second stage, the solver must traverse through the grid row after row from left to right and top to bottom and eliminate every digit that would break normal sudoku rules. Every remaining digit from boxes 1-7 and the given digits in boxes 8 and 9 form a normal sudoku, i.e. the variant clues from stage one don't apply! In the picture there is an example for this process.

Variant rules:
Digits along an arrow must sum to the circled digit (Box 1)
Digits in cells separated by a V must sum to 5. (Box 2)
Digits in grey cells are either larger or smaller than every orthogonally connected cell. (Boxes 2, 6)
Digits along a thermometer must increase from the bulb end. (Boxes 3, 5)
Digits in a grey circle must be odd. (Box 3)
Digits along a grey line must form a palindrome, i.e the number on the line must be same no matter the direction it is read from (Box 4)
Digits in cages must sum to the clue in the top left corner of the cage and must not repeat within the cage. (Boxes 4, 7)
Digits on a line with two circled endings must be in between the digits in the circles. (Box 5)
F-Puzzles