Four of Diamonds
by FullDeck and Missing a Few Cards Open on SudokuPad
Heartburn
- Killer cages
- Region sum lines
The brief
**Standard Sudoku, Cages, Region Sum Lines** - 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. - Region Sum Line: The sum of the digits on a region sum line within a particular region must be the same for all of the regions the line passes through.