Logic Masters Deutschland e.V.

Normal sudoku rules apply. Furthermore:

- The marked diagonals contain the digits 1-9 exactly once;
- The red cells sum to 14;
- Digits may not repeat within cages, and sum to the value in the top left;
- Grey lines contain palindromes. A palindrome is a sequence that reads the same from both sides (e.g. 3, 4, 7, 4, 3).


f-puzzles link here.
There is a hint below the image

Hint.