Digits outside the outlined area represent the number of skyscrapers that is visible from that vintage point. Higher skyscrapers hide lower skyscrapers.
The small numbers in the upper left corner of the dotted outlined areas are the sum of the digits inside that areas. Within areas, digits may not repeat.
Killer Skyscrapers I: Easy
Solution code: Row 2, followed by row 5 (2 x 6 digits)
on 7. March 2025, 19:00 by sisk0
Sudokupad link:
https://sudokupad.app/va7mlv1c3l
(turn off conflict checker or use pencil marks for outside digits)
on 29. September 2021, 18:07 by glum_hippo
Online solver with answer checking enabled. Please delete if not desired: https://git.io/Jgv8G