Double Equality Yin Yang
(Published on 22. August 2026, 01:00 by yttrio)
Rules:
Normal Sudoku rules apply.
Yin Yang: Shade some cells such that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and no 2x2 area is fully shaded or fully unshaded.
Digits in shaded cells count as double their value for the purposes of sums. Digits in unshaded cells count their normal value.
Digits cannot repeat in cages (though effective values may repeat, such as a doubled 1 and regular 2). Every cage contains at least one shaded cell and one unshaded cell. In each cage, the sum of values in shaded cells equals the sum of values in unshaded cells.
6x6 Example:
The image below shows a sample 6x6 puzzle and solution with the same rule set.
Play the example 6x6 in SudokuPad.
Solution code: Digits in shaded cells in row 2 (left to right) followed by digits in shaded cells in row 5 (left to right)
Comments
on 29. August 2026, 10:41 by ddx02
Great!
on 28. August 2026, 05:46 by Norkas
Exellent setting.
on 27. August 2026, 14:32 by Calvinball
Stunning! I was a little daft in getting things started, but once I got out of my own way it was just a seemlessly smooth experience the entire way through. Thank you!
on 26. August 2026, 16:53 by amirs
Absolutely beautiful! I got stuck several times in the middle game but persevered and eventually figured it out. It was definitely worth it. 4* for me
on 25. August 2026, 14:59 by Draxie
Wow! Tough mid solve but flow to the end was exhilarating. Chapeau!
on 25. August 2026, 14:31 by Exigus
Bonkers!
on 25. August 2026, 13:34 by Draxie
Wow! Tough mid solve but flow to the end was exhilarating. Chapeau!
on 24. August 2026, 21:13 by WildEnte
great flow if you're not thinking about the wrong things forever :)
on 24. August 2026, 21:10 by valacd
Beautiful puzzle! Got stuck early midsolve (without WildEnte I might still be stuck), but besides that it was great fun. Lovely flow and logic! Thank you, yttrio!
on 24. August 2026, 17:18 by DaniK
Lovely!
on 24. August 2026, 16:44 by LehanLehan
Outstanding,masterful construction;it was tough to find right deductions but so satisfying and fair. Thank you very much for the entertainment,yttrio.
on 23. August 2026, 19:12 by Agent
Great!
on 23. August 2026, 18:09 by PrissyP
Amazing puzzle all the way through! Not a single step that felt too easy or too hard, just a very skillfully set puzzle. Thank you
on 23. August 2026, 17:10 by sujoyku
So good, so good. I don't know what to say, except for: Thank you for this fantastic puzzle, yttrio!
on 23. August 2026, 16:01 by wuc
Brilliant puzzle. The break in calc combined with yy experience makes it 3.5-4* to me. Awesome some setting thx.
on 23. August 2026, 15:12 by MAWA
really nice puzzle,really enjoy!
on 23. August 2026, 15:12 by MAWA
really nice puzzle,really enjoy!
on 22. August 2026, 22:38 by RedBarchetta
Nice. 5 star when I made bad assumption and failed. 3 star on second try. 4 star average! :)
on 22. August 2026, 19:14 by Christounet
Great! Some tricky step for me in the early midsolve. Thanks :)
on 22. August 2026, 16:24 by polcat
Brilliant puzzle. Thank you!
on 22. August 2026, 16:23 by Deckatron
Simple rules. Amazing logic. Superb.
on 22. August 2026, 12:43 by Myxo
Lovely!
on 22. August 2026, 11:25 by Snookerfan
Great puzzle! Lovely logic. I think this is a 2 to 2.5 star puzzle. Thanks
on 22. August 2026, 11:08 by mihel111
I thank you, king of ying yang.
on 22. August 2026, 11:00 by Franjo
Thank you very much for creating and sharing another fantastic YY-hybrid.
on 22. August 2026, 10:10 by Wuschel
Very cool as usual. Thank you!
on 22. August 2026, 09:08 by Piatato
Awesome!
