One Knight's Foggy Secret
- Fog of war
- Anti-knight
- Kropki dots
- Whisper lines
The brief
- Normal Sudoku rules apply.
- Cells separated by a knight's move in chess cannot contain the same digit.
- Adjacent digits along a green German Whisper line must have a difference of at least 5.
- A black dot between cells indicates cell values with a 2:1 ratio. A white dot between cells indicates cells with consecutive values. Not all dots are given.
- The grid is partially covered with fog. Correctly placed digits will clear the fog around that cell. No guessing is required.