SudokuCon Day One 2026
by FullDeck and Missing a Few Cards Open on SudokuPad
Indigestion
- Kropki dots
- Whisper lines
- Whisper 4
The brief
**Sudoku, Whisper-4, Kropki Pairs** - Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - Whisper-4: Adjacent digits along a Whisper-4 line must differ by at least four. - Kropki Pairs: Digits in cells separated by a black dot are in a 1:2 ratio. Digits in cells separated by a white dot are consecutive. For more of our puzzles, please visit https://missingdeck.net or join our mailing list to get a weekly digest of puzzles: missingdeck.net/mailing