In the Box
Every bold outlined area contains exactly three cells that belong to two different buildings.
Solve online in Penpa+ (thx Nick Smirnov!)
Solution code: The number of knicks in the loop; row by row, top to bottom.
on 15. October 2022, 06:21 by Richard
Added link and tag for online solving. Thx Nick!
on 10. September 2022, 17:53 by Nick Smirnov
Penpa:
https://tinyurl.com/2glcyz64
on 19. July 2014, 11:37 by pin7guin
Zuerst habe ich "bewiesen", dass das Rätsel unlösbar ist.
Im nächsten Anlauf ging es dann prima durch... :-)
on 10. January 2014, 17:53 by Richard
There is, of course, some logic to get started in this puzzle. I have written some lines in a hidden comment so you can read it and learn from it in case you didn't find it yourself during solving... Have fun!
on 10. January 2014, 17:44 by Alex
I found that rather tricky! Great construction.