Sudoku Variants Series (300) - Killer Skyscrapers Sudoku
(Published on 22. December 2020, 22:00 by Richard)
When I started thinking of SVS in autumn 2013, I made the first list with a bit over 100 possible variants. Most of those had appeared somewhere earlier in championships or competitions. I still have that very first version of the list and I sometimes take a look at it since not all types have been used yet. One of the unused types was Killer Skyscrapers. During all those years it simply didn't happen to make a Killer Skyscrapers Sudoku. And since I am the inventor of that puzzle type I decided to reserve this one for the #300 jubilee. And here it is.
Killer Skyscrapers Sudoku
Inspiration for this type comes from me.
Solve online in Penpa+ (Thx SudokuExplorer!).
Apply classic sudoku rules.
Each digit within the 9x9 region represents a skyscraper of that height. Digits outside this region indicate how many buildings can be seen from that direction, where higher buildings block the view of lower buildings. The small numbers in the upper left corner of the dotted outlined areas indicate the sum of the digits in that area. Within a dotted outlined area all digits must be different.
Solution code: Row 5, followed by column 4.
Comments
on 11. January 2023, 00:29 by Florian Wortmann
I chose this puzzle for my 300th solve on LMD and didn't regret it :-) Very nice puzzle, and I also appreciate the symmetric arrangement of the cages!
on 19. December 2021, 08:13 by Richard
Added link for online solving. Thx SudokuExplorer!
on 11. January 2021, 12:34 by Mody
Großartig und wunderschön zu lösen
on 1. January 2021, 08:44 by AnnaTh
Wonderful variant! Thanks for your challenging creations.
on 30. December 2020, 23:09 by CHalb
Richard, my congratulations to this special jubilee! Thanks for your amazing contribution to this portal and the puzzle world in general. And how nice to get this small look behind your scenes :-).
on 26. December 2020, 14:24 by Senior
Ein würdiges Jubiläumsrätsel!
on 24. December 2020, 03:42 by Skyler
Great skyscraper puzzle!
on 23. December 2020, 19:59 by marcmees
Thanks and congratulations with your 300th in the greatest series ever.
on 23. December 2020, 17:16 by henrypijames
I too want to add my gratulation and gratitude for this series which can only be described as legendary.
on 23. December 2020, 14:24 by rcg
Hi Richard. Congratulations on this incredible achievement. It is a pleasure solving (and testing) all of them.
on 23. December 2020, 13:49 by glum_hippo
This was superbly well made! That middle column gave me a lot of trouble before I decided to take a more sensible path. Thank you Richard! and I certainly learned from it
on 23. December 2020, 09:12 by stephane.bura
Congratulations on this milestone in this wonderful series, Richard!
Here's to at least 300 more :)
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Thanks!
At every milestone I write that I doubt how far the series will stretch. In this case I am pretty sure that there won't be another 300 different variants with a single ruleset! :)
on 23. December 2020, 07:50 by zhergan
Congratulations Richard! It is also a very nice choice for the #300. Thanks for all nice puzzles..
on 23. December 2020, 04:34 by panthchesh
Congratulations! And thanks for the puzzles!! :)
on 23. December 2020, 00:20 by cdwg2000
Congrats！
The 300th puzzle is great. I like all your puzzles very much. I have completed 80% of them. I hope I will continue to work hard to complete the remaining puzzles.
on 23. December 2020, 00:02 by harrison
Congrats Richard!
This was a very fun variant, and a good way to ring in 300.
on 23. December 2020, 00:01 by Senior
Herzlichen Glückwunsch, Richard, zum 300er-Jubiläum Deiner großartigen Serie!
Könnten diese vielen wunderbaren Sudokus nicht den Stoff für ein Buch liefern, ein Lexikon der Sudokuvarianten gewissermaßen?
Angeregt durch die Kommentare zur Nr. 270 habe ich im Herbst mit einer statistischen Aufbereitung der SVS begonnen. Das Ergebnis ist, verbunden mit einem persönlichen Dank an Richard, ab heute im Forum zu finden.
Ich erinnere mich, dass ich eine ähnliche Auswertung der ersten 100 Rätsel dieser Serie (im Oktober 2015) mit der sehr naiven Frage abgeschlossen hatte: Wird es eine 10000. Lösung bei den „Sudoku Variants Series“ geben?
Dank einer ganz aktuellen Recherche von Statistica wissen wir, dass die Datenbank am gestrigen Tag, 16:16 Uhr, insgesamt 29.528 Lösungen ausweist.
Eine wirklich beeindruckende Bilanz!
on 22. December 2020, 22:30 by SudokuExplorer
Here's a Penpa+ link: https://git.io/JLiAv
Congratulations on this milestone! Its incredible how you manage to produce something different each time. :-)
on 22. December 2020, 22:12 by Qodec
Congratulations!! What a milestone!
on 22. December 2020, 22:11 by skywalker
Hi Richard, congratulations for this incredible achievement!!!
on 22. December 2020, 20:04 by Richard
It is recommended to solve the small puzzle first if you are not familiair with killer skyscraper to see how the clue setting might work.
