Renban/Skyscrapers Sudoku
(Published on 11. September 2021, 13:47 by MagnusJosefsson)
Standard Sudoku rules apply.
Each digit in the grid is also a "skyscraper" whose height is the digit in that cell. Taller skyscrapers obscure the view of smaller ones.
Numbers outside the grid indicate the number of skyscrapers that can be seen from each vantage point.
Lines in the grid are Renban lines: the digits along each line must form a non-repeating set of consecutive digits (in any order).
Example:
The puzzle:
Link for solving online:
Penpa+
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Solution code: Row 5, then column 9 (18 digits).
Comments
on 12. March 2024, 21:56 by StephenR
Not sure I'd call it straightforward, but this little gem is definitely more approachable than most of Magnus's puzzles, and still packed with excellent logic.
on 25. September 2023, 01:41 by lerroyy
https://tinyurl.com/2c43jttq penpa+
https://tinyurl.com/2rfvsp25 sudokupad
on 14. September 2021, 22:28 by StefanSch
Amazing logic, thank you!
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Thank you StefanSch, really glad you liked it! /Magnus
on 13. September 2021, 00:38 by Vebby
Wow, I took a while to find the break-in. So clever! It was a pleasure to work it out once I made the initial headway. Thanks Magnus! :)
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Thank you for solving Vebby! :) /Magnus
on 11. September 2021, 18:37 by MagnusJosefsson
Increased difficulty to four stars on feedback from first two solvers.
on 11. September 2021, 17:37 by henrypijames
The logic is only straightforward in hindsight. I struggled quite a bit trying to discover them, including "after the first few digits are placed". Squarely 4 stars difficulty for me.
on 11. September 2021, 13:45 by MagnusJosefsson
By the way, if you enjoy this type of puzzle and would like to try some more challenging ones that are truly excellent, I can highly recommend "Position Sums mit Renban-Streifen" by glum_hippo and "Renban X-sums sudoku" by udukos.
on 11. September 2021, 13:30 by MagnusJosefsson
This should be a relatively straightforward and manageable puzzle, especially after the first few digits are placed. However, I hope (and think) that you will still find it interesting and enjoyable :). Good luck!
