Cornered Quads
by FullDeck and Missing a Few Cards Open on SudokuPad
GAS
- Killer cages
- Quadruples
The brief
- Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - Cages: Digits in cages cannot repeat and must sum to the value shown in the upper left corner of the cage. - Quadruples: Digits in a Quadruple circle must be placed at least once in the four cells touching that circle.