Logic Masters Deutschland e.V.

Rules:

• Standard 9x9 sudoku rules apply.
• Every cage belongs to one of four "types" that you must determine: whisper cages, kropki cages, renban cages, and nabner cages.
  • Digits in orthogonally adjacent cells in a whisper cage must differ by at least 5.
  • Digits in orthogonally adjacent cells in a kropki cage must either have a difference of 1, or a ratio of 2.
  • Digits in a renban cage belong to a set of consecutive digits (placed in any order).
  • No two digits anywhere in a nabner cage can have a difference of 1.
• Digits in a cage cannot repeat, and digits cannot appear in multiple cages of the same type.