Each digit in the grid is a "skyscraper" whose height is the digit in that cell. Taller skyscrapers obscure the view of smaller ones. Clues outside the grid tell how many skyscrapers are visible looking across the row or column from the direction of the clue.
Isotropic groups: Each group of nine cells occupying the same relative position in the nine boxes is isotropic: all nine are from {123} or all nine are from {456} or all nine are from {789}.
Try the puzzle on the CTC app.
You can find a complete list of our puzzles on LMD here. Please also visit us at Missing Deck Puzzles. Thank you to BremSter for a lovely video solve of this puzzle.
Solution code: Row 5 from left to right (9 digits, no spaces).
on 11. July 2024, 16:27 by ThymePass
This was fun. Thanks!
on 26. March 2024, 12:55 by Snaques
This was surprisingly really fun. The break in was something really unexpected. After that the puzzle was rather straightforward, but fun nevertheless.
on 2. October 2022, 22:18 by FullDeck-Missing
Added link to a featured solve of the puzzle.
on 1. October 2022, 01:49 by Bremster
Beautiful trick to figure out with so few given clues. I love this so much.
Video solve: https://youtu.be/PXc5jQp1NyA
>> Thank you, and thank you also for the lovely solve!
on 27. September 2022, 16:35 by OGRussHood
At first glance, I thought this puzzle was impossible with only six clues provided. Then I quickly realized that "isotropic groups" is just a fancy way of saying "swordfish". Lovely puzzle.
>> Thank you!
on 24. September 2022, 03:36 by riffclown
This puzzle is FAR better than the rating. Highly Recommend.
>> Thank you, riffclown!
on 16. September 2022, 17:02 by JR_pianoman
Wow. So elegant. Amazing it solves as easily as it does with so little information in the grid. Satisfyingly chromatic as well.
>> Thank you for your kind words! Very glad it was satisfying :)
on 15. September 2022, 19:35 by jorgenunez
I thought it was going to be impossible, but I saw the break-in and had a lot of fun solving it.
Thanks!
>> :) You are most welcome, and thank you for your kind words!
on 15. September 2022, 16:48 by The Colonel
That was a fun solve!
>> Thank you! Delighted that you had fun with it :)
on 15. September 2022, 16:15 by MonsieurTRISTE
Satisfying
>>Thank you! So glad you enjoyed it :)