Day 16 Skyscrapers
(Published on 16. December 2025, 06:00 by SharpFox)
As I have been very busy lately, I was only recently able to improve Day 12. I extended the Renban line as recommended, so that there is now a unique solution. I apologise for the ambiguity.
Rules:
- Normal 4×4 Sudoku rules apply.
- Each number corresponds to a skyscraper with a height equal to its value. When viewed from one side, taller skyscrapes/larger digits obscure the smaller skyscrapers/digits behind them. The clues outside the grid indicate the number of visible skyscrapers in the row or column.
- The red lines are parity lines. Even and odd numbers always alternate along these lines.
Solution code: The diagonal from top left to bottom right (4 digits):
Last changed on -
Solved by allama, MaxSmartable, YoooDeej, DK_48, thomamas, brandon_bot, kehan628, Majesteit, wuc, PatJoyce, rcg, meiwanmeiliao, pfox, EFlatMinor, Gnylp, flaemmchen, CARSOR876, cornuto, marajade, ... Kleiner_Lateiner, Stepman5, RobertBe, Terrapin, stafen, Godlord2, hampterss, ethteck, Kenji769, johnreid, Morisenseiisgod, BPetroglyph, Ashryn, Jett, basi, mmmead, geronimo92, ludvigr04, bittchill
Comments
on 16. December 2025, 16:40 by superkinkel
Thanks, not the greatest skyscraper enthusiast, but thanks for restoring confidence in my sanity, since I spent over an hour to find my mistake in not being able to find a unique solution to resolve the last box in number 12.
on 16. December 2025, 12:10 by Aronana
Lovely Snack for the Holidays
on 16. December 2025, 07:36 by wuc
Great work. Nice to see approachable puzzles of challenging constraints. Great coffee break thx.
