Zip-Zapped Through the Fog
- Fog of war
- Kropki dots
- XV and number dots
The brief
- Normal Sudoku rules apply.
- THERE IS ONE, AND ONLY ONE, purple Zipper Line, along which each pair of digits that are the same distance from the line's central cell (indicated by a filled purple circle), must sum to the digit in that central cell.
- 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.
- Adjacent cells connected with an X must sum to 10.
- Cells with a filled square must be even.
- The grid is partially covered with fog. Correctly placed digits will clear the fog around that cell. No guessing is required.