Octagong
by FullDeck and Missing a Few Cards Open on SudokuPad
Heartburn
- XV and number dots
- Region sum lines
The brief
**Standard Sudoku, Sum Lines, 8-Blocks** - Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - Sum Line: Box borders split blue lines into sections, and the digits on those sections must sum to the same value. If a line has multiple sections within a box, these sections are summed separately. - 8-Blocks: Pairs of digits connected by a red block sum to 8. For more of our puzzles, please visit https://missingdeck.net