Bipolar Quads
More from The Bard
- Quadruples
- Lines of set digits
The brief
Normal Sudoku rules apply, place the digits 1-9 in each row, column, and box.
Quadruples: Digits in the white circle must appear in at least one of the four surrounding cells.
Anti-Quadruples: Digits in the light red circle cannot appear in one of the four surrounding cells.
Bipolar Quadruples: In the yellow circle of the four digits, two digits cannot appear and the two other digits must appear in any of the four surrounding cells.