Bipolar Quads
(Published on 18. February 2026, 07:01 by The Bard)
Normal Sudoku rules apply. Place the digits 1-9 in each row, column and box without repetition.
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.
If you like this puzzle you may enjoy some of my other puzzles too, click HERE to see the other puzzles I have made.
Solution code: Row 2
Comments
on 19. February 2026, 08:11 by VitP
gas
on 18. February 2026, 22:17 by HumanBirdsong
Absolutely loved this, great stuff!
on 18. February 2026, 15:01 by cygne
Very cool ruleset! I'd be quite interested to see a future puzzle like this but a bit harder
