Even Doubles Do the Zip
by FullDeck and Missing a Few Cards Open on SudokuPad
Heartburn
- Kropki dots
- Zipper lines
- Odd and even cells
- Even
- Kropki ratio
The brief
**Standard Sudoku, Zipper Lines, Even Cells, Ratio Dots** - Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - Zipper Line: Along Zipper lines, pairs of digits equidistant from the center of the line have the same sum. For Zipper lines of odd length, that sum is the central digit on the line. - Ratio Dots: Digits separated by a black dot are in a 2:1 ratio. - Even Cells: Cells marked by grey squares contain even digits. For more of our puzzles, visit https://missingdeck.net