Logic Masters Deutschland e.V.

Rules:

• Normal sudoku rules apply.
• Cages must sum to a square number (whose identity is to be determined), and digits cannot repeat within them.
• The marked diagonals must also sum to a square number - digits may repeat if allowed by other rules.

Links to online solving tools:

• F-Puzzles
• Cracking The Cryptic

Easter egg: check the sum of all non-caged cells in the completed puzzle... :)