Zwispers
by FullDeck and Missing a Few Cards Open on SudokuPad
Strong Indigestion
- Zipper lines
- Whisper lines
- German whisper
The brief
- Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - All lines in this puzzle are both German Whispers AND Zipper lines. - German Whispers: Adjacent digits along a German Whispers line must differ by at least five. - Zipper Line: Along Zipper lines, pairs of digits equidistant from the center of the line have the same sum. For example, in this puzzle r1c1 + r1c2 = r2c1 + r1c3.