Signal Degradation
by FullDeck and Missing a Few Cards Open on SudokuPad
Heartburn
- Zipper lines
- Nabner lines
The brief
- Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - All lines are both Zipper AND Nabner lines. - Zipper Lines: 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. - Nabner Lines: No two digits along a Nabner line can be consecutive, regardless of their position on the line. Digits may not repeat on Nabner lines.