[This is a repost from our archives with new notes at the top (original post here): This hardest Skyscrapers puzzle of the first set chains a lot of the outside clues together to force just one solution. I certainly remember a lot of clue adjustment that was possible in the late stage of this puzzle before a few orthogonal clues snapped together to leave a completed grid.]

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: Countdown!

Rules: Standard Skyscrapers rules.

Estimated Difficulty*: 3.5 stars

Time Standards (highlight to view): Grandmaster = 4:30, Master = 8:00, Expert = 16:00

Solution: PDF

Note: Follow this link for classic Skyscrapers puzzles and this link for variations on Skyscrapers puzzles. If you are new to this puzzle type, here are our easiest Skyscrapers Puzzles to get started on. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.