真笑Puzzles018--N-Sums Sudoku--Skyscraper
(Published on 23. January 2021, 10:12 by cdwg2000)
Author: 真笑(洪卫华), from China, this question comes from his personal blog.
This is a combination of N-sums and skyscrapers.
The last N-Sums Sudoku:
Click enter N-Sums Sudoku,The author is 米艳明（Mi Yanming）.
N-sums Sudoku--Skyscraper
1. Classic Sudoku rules apply;
2. The numbers outside the grid indicate the sum of the first N cells in that direction.and N is the number of observations of skyscrapers at that location.
3.Standard Skyscrapers:Insert a digit from 1 to N into each cell in the N by N grid so that no digit repeats in any row or column. Also, each number in the grid represents the height of a building and the clues on the outside of the grid indicate how many buildings can be “seen” when looking from that direction. Taller buildings block the view of smaller buildings.
Solution code: Row 3,Coloum 7.(A total of 18 numbers).
Comments
on 17. June 2021, 16:42 by Mody
Wunderbarer Tüftelspaß.
Great puzzle
on 16. May 2021, 04:54 by cdwg2000
@Genomico @StefanSch
Glad you like it.
on 11. May 2021, 22:58 by Genomico
Very nice concept! Thank you for the puzzle :)
on 7. February 2021, 21:15 by StefanSch
Verry nice puzzle idea! Thank you!
on 28. January 2021, 05:51 by cdwg2000
Repaired txt.
on 24. January 2021, 23:16 by cdwg2000
@SudokuExplorer@marcmees
I am very glad that you like it, thank you.
on 24. January 2021, 22:06 by SudokuExplorer
Lovely logic! Thanks for the fun skyscrapers puzzle :-)
on 23. January 2021, 16:44 by cdwg2000
Added Penpa+ link. Thanks Dandelo.
on 23. January 2021, 16:37 by cdwg2000
@Dandelo
I am also learning how to use Penpa+. I basically don’t know how to verify the answers on Penpa+. If possible, I will study the manual carefully. I am better at using PZV and PUZZ. F-puzzles is limited by the network and cannot be used. I think Penpa+ will be a more general puzzle setting tool, but it may need a guide, and there are some problems such as rich puzzle types. Maybe he Will gradually be improved. Thanks Dandelo! Thanks Swaroop!
There may be two other variants of the X-Sums rule set, which may be an interesting combination.
on 23. January 2021, 15:43 by Dandelo
Very nice. At a first glance it seemed a little bit artificial to invent the next ...-sums by mixing skyscrapers and x-sums. But it is a very harmonic ruleset and allows tricky conclusions. And, as always, a good solution path.
In penpa+ you have to turn 'border' on. Maybe not all solvers know this. And 'R' should be on, too. What I've learned recently: If you are in edit mode and there in solution mode and there you turn border etc. on before creating the link for solver mode, it is saved and the solver is immediately in the best setting.
Here's a link to penpa+ with these settings and with solution check: https://git.io/Jts0T
But the solution check works only with empty circles. I don't know how to create a solution check that checks the grid, but not the circles. I'll ask Swaroop if this is possible.
on 23. January 2021, 14:06 by marcmees
very nice mindtwister. Simple rules but nevertheless glad you provided an example.thanks
on 23. January 2021, 11:55 by cdwg2000
The ○ symbol provided by Penpa+ link is used to mark observation numbers of skyscrapers. If necessary, you can enter numbers. If you don't need it, please ignore it.
