Pianissimo Van Beethoven through the Fog
- Fog of war
- Killer cages
- Whisper lines
- Quadruples
- Odd and even cells
The brief
- Normal Sudoku rules apply.
- The grid is partially covered with fog. Correctly placed digits will clear the fog around that cell. No guessing is required.
- THERE IS ONE, AND ONLY ONE, green German Whisper line, along which, adjacent digits must have a difference of at least 5.
- Digits in a cage do not repeat and sum to the clue in the top left.
- Digits in a white circle must appear at least once in the four surrounding cells.
- Cells with a filled circle must be odd.