There's Sum-Thing in the Fog
- Fog of war
- Killer cages
- Kropki dots
- Region sum lines
The brief
- Normal Sudoku rules apply.
- THERE IS ONE, AND ONLY ONE, blue sumline, where box borders divide the line into segments of equal sum.
- 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 shown.
- Digits in a cage do not repeat and sum to the clue in the top left.
- The grid is partially covered with fog. Correctly placed digits will clear the fog around that cell.