Exclusive Internal Skyscraper Yin Yang
(Published on 4. July 2025, 23:14 by yttrio)
This puzzle is a variant of the rule set for Exclusive Internal Skyscraper Loop. Estimated difficulty is between 3 and 4 stars.
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.
Cells with arrow clues are internal skyscraper clues. Each cell in the grid represents a skyscraper with a height equal to its value. A digit in a clued cell gives the number of skyscrapers visible in the indicated direction (not including the cell itself), where every skyscraper blocks the view of all skyscrapers with the same or lower height behind it.
All cells seen as skyscrapers from a clued cell must be shaded. All cells in the direction of the clue not seen as skyscrapers must be unshaded.
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 5 (left to right) followed by digits in shaded cells in column 8 (top to bottom)
Comments
on 25. July 2025, 18:57 by Astraeus
I really love the way the internal skyscrapers interplay with these other rulesets. I'd never have expected it. Brilliant work!
on 20. July 2025, 14:19 by BorisP2101
I loved every moment of it, brilliant puzzle :D
on 7. July 2025, 19:36 by Exigus
Another beautiful puzzle. Thanks.
on 7. July 2025, 17:16 by Snue
Amazing combination of rulesets :)
I loved the internal skyscraper loop as well :)
Thank you so much for setting these puzzles :)
on 7. July 2025, 15:57 by Voidslime
Very fun and challenging! I’m glad to have solved this after not being able to even break into the internal skyscraper loop. Something about these breaks my mind! In a good way. I love the challenge
on 6. July 2025, 13:08 by marcmees
Very nice. Tricky when one forgets that skyscrapers can be any size when not pointed at by an arrow. :-) Thanks
on 5. July 2025, 15:53 by Franjo
What a wonderful bonus-puzzle for your YYJ, that I loved to join last month! Thank you so much for creating and sharing another great YY-hybrid.
on 5. July 2025, 03:49 by Calvinball
So glad to see you aren't bored with Yin Yang :P
What a treat!
on 5. July 2025, 03:38 by Elliott810
Brilliant as always! Thank you:)
