General Whisper
Rules:
- Classic Sudoku:
Every row, column and 3x3 box must contain every number from 1 to 9.
- Global Anti-Chinese Whispers:
Every pair of orthogonally adjacent digits must have a difference of at least 3.
- Kropki:
Two digits separated by a black dot have a ratio of 1:2.
Play it online in SudokuPad.
This puzzle is also on Logic Masters Germany.