Yin-Yang Killers
(Published on 28. March 2026, 16:21 by Sneppix)
Yin-Yang Killers
Rules:
- Normal sudoku rules apply.
- Yin-Yang: Color the grid using two colors such that all cells of the same color are orthogonally connected and no 2x2 area is fully one color.
- Digits in circles indicate the total number of cells of the same color seen orthogonally from that cell, including itself. Cells of the other color block vision. Circles with the same color may not contain the same digit.
- Killer: Digits in a cage may not repeat and must sum to the small clue in the top left corner.
Enjoy!
Solution code: Column 7, top to bottom
Comments
on 29. March 2026, 19:12 by Big Tiger
It was listed as 2 stars when I started... By the time I fought through and labeled it 3 stars, I see that the majority agrees, ha ha. It actually got harder in the middle, for me. But it was a FUN challenge, not a frustrating one. Good times.
on 29. March 2026, 19:05 by Snookerfan
Very nice and smooth, except for one hard step. Lovely combination of constraints. Thanks!
on 29. March 2026, 13:46 by Franjo
Thank you very much for creating and sharing this beautiful YY-puzzle.
on 29. March 2026, 06:13 by xiaoji
I really like the break-in part! At first this puzzle seems impossible, but as I recall some basic strategies for yin-yang, the break-in becomes very clear.
on 28. March 2026, 19:44 by enjoy010502
very nice puzzle
on 28. March 2026, 19:12 by Adrian71
This is such a lovely puzzle! The different constrain types are working so well together, I loved the way the puzzle unfolded itself. Great setting, thanks for sharing!
