Quadromodular
by FullDeck and Missing a Few Cards Open on SudokuPad
Heartburn
- Modular lines
- Quadruples
The brief
**Sudoku, Modular Lines, Quadruples** - Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - Modular lines: Any set of three adjacent digits along a modular line (usually teal in colour) has three different remainders when divided by 3. - Quadruples: Digits in a Quadruple circle must be placed at least once in the four cells touching that circle. 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