Yin Yang 5 on a Side
(Eingestellt am 3. Oktober 2026, 17:30 Uhr von Md88keys)
by Md88keys
Play in Sudokupad
Normal sudoku rules apply.
White dots pair consecutive cells.
Black dots pair cells in a 2:1 ratio.
Yin Yang: Shade the grid so that so that the white dot cell pairs are shaded and the black dot pairs are unshaded. All shaded white dots are given. Each region must be orthogonally connected and there must be no 2x2 regions completely shaded or completely unshaded. The shaded cells within a box will sum to a number that is different from every other shaded box sum.
5 on a side: Cells containing the digit 5 must be in the same region, either all are shaded or all are unshaded.
Lösungscode: One letter (S or U) and nine digits. Is R4C1 Shaded or Unshaded, then list the digits in the row.
Kommentare
am 8. Oktober 2026, 17:20 Uhr von VitP
surely there are more than 38 yy fans ?
one or 2 tricky parts, but otherwise quite easy, within the yy paradigm.
i would use the wording
"in the shaded region, all white dots are given"
am 6. Oktober 2026, 18:59 Uhr von Snookerfan
Very nice and fun, thanks!
am 6. Oktober 2026, 07:31 Uhr von blueberrypug
@anothermember yes you do need it in the very end or otherwise the puzzle doesn't solve
am 4. Oktober 2026, 15:19 Uhr von anothermember
Very nice! It might have slipped my mind where I used it but I don't think I needed the shaded box sum rule in the end.
am 3. Oktober 2026, 21:22 Uhr von Decapod
It started and ended with the shading, before the 1st digit and after the last :-).
Very satisfying, but not easy for me - 46 minutes.
am 3. Oktober 2026, 18:51 Uhr von Elliott810
Brilliant puzzle! Thank you:)
am 3. Oktober 2026, 18:49 Uhr von Blake Saligia
Multiple solutions exist if without this negative constraint
--yes, I included that rule in the yin yang section, "all shaded white dots are given", but I worried that was unclear in the original rules, so I added a comment as well.
am 3. Oktober 2026, 17:33 Uhr von Md88keys
To clarify the white dot negative constraint: Orthogonally connected shaded cells without a given white dot will not be consecutive.
