Logic Masters Deutschland e.V.

Quattroquadri: Put the digits 1 to 9 into each box such that no digit repeats in any row or column.
Renban: Numbers on a purple line form a set of non-repeating consecutive numbers in any order. Note that the line crossing boxes 3 and 4 is one big renban.
X-Sums: A number on a renban line outside the grid gives the sum of the first X digits from that direction where X is the digit next to the number.

Links:
SudokuPad: https://sudokupad.app/38qddzk7b4