Logic Masters Deutschland e.V.

Hello. Here is a puzzle to close 2022 ! I hope you'll have fun with it (of course a 23 puzzle will follow in a few days!)

Rules
Usual rules for : Arrows, Renban, Palindrome, Killer cages and Little Killers (see below)
The numbers outside the grid (without arrows) are sandwiches OR X-sums : each colour is one of those (you’ll find this easily…) ; the black numbers are one or the other (not very difficult either !)
The 2 squares are Battenburg : the four surrounding squares contain two odd and two even digits in a checkerboard pattern. No negative constraint !

Arrows : Digits along an arrow sum to the number in the arrow’s circle.
Battenburg : The four surrounding squares contain two odd and two even digits in a checkerboard pattern.
Killer cages : : Digits in cages must sum to the number given at the top left corner of the cage. Digits may not repeat within a cage.
Little Killer :: Clues outside the grid with a little arrow give the sum of the digits along the indicated diagonal.
Palindrome lines: The sequence of digits along a grey line must form a palindrome, so it reads the same backward and forward.
Renban (purple) line : must contain a set of consecutive, non-repeating digits in any order.

Difficulty : I think it's between ** and ***. Tell me !
... and enjoy

Click here to play on F-puzzles