I "stole" this idea from CHalb & rimodech, but it's actually different :)
Normal skyscrapers puzzle. But the blue cells are also hints for the "smaller" 4x4 skyscrapers puzzle (that can also contain any digit 1 to 7). External hints are also valid for the smaller puzzle if they are colored in blue, even if they are not given.
Lösungscode: Row 3 and column 3
am 9. August 2018, 15:29 Uhr von DarkBeamIta
Hmm probably an extra verification :) ... maybe
am 9. August 2018, 14:13 Uhr von Joe Average
"External hints are also valid for the smaller puzzle if they are colored in blue, even if they are not given."
-> In den blauen Außenfeldern stehen unbekannte Zahlen, die gleichermaßen für das gesamte Hochhausrätsel, als auch für das innere Hochhausrätsel gelten.
am 9. August 2018, 13:39 Uhr von Luigi
What is the intention of the dashed blue outside hints?
Whatever meaning they have, I did not need them for solving the puzzle.
am 9. August 2018, 12:33 Uhr von DarkBeamIta
Glad you liked! Effectively this variant seems very funny :D ...
am 9. August 2018, 11:57 Uhr von CHalb
I really like this variant. I thought about such variations some time ago, but somehow didn't come to anything senseful. So I'm happy, that you showed it to us.