Logic Masters Deutschland e.V.

Rules:

Normal Sudoku rules apply. Cells separated by a chess Knights move don't have repeated digits. Additionally, the digits in 9 circles given in the grid forms a Magic square.

Between line: The digits in the lines must be in-between the digits in the connected circles.

Renben: Each of the purple, blue or green lines are Renben lines and contain a set of non repeating consecutive digits.

Cells separated by 'X' sums to 10. Inequality sign points towards lower of the two digits (7>3). No negative constraint.

f-puzzle link:

f-puzzle (Anti-Knight)