One Knight's Crusade
- Fog of war
- Killer cages
- Anti-knight
- Whisper lines
The brief
- Normal Sudoku rules apply.
- Cells separated by a knight's move in chess cannot contain the same digit.
- The grid is partially covered with fog. Correctly placed digits will clear the fog around that cell. No guessing is required.
- Digits in a cage do not repeat and sum to the clue in the top left.
- Adjacent digits along a green German Whisper line must have a difference of at least 5.