Underwater Subway
(Published on 4. January 2023, 18:01 by wooferzfg)
This puzzle was created by Jakhob and wooferzfg, and it is a combination of a U-Bahn and a Nurikabe (without the restriction on 2x2 areas).
If you are unfamiliar with U-Bahn, here is a guide that covers the core logic.
Draw a loop network through the centers of some empty cells, which may branch or turn, but may not have any dead ends.
A clue outside the grid indicates how many times the corresponding line shape (i.e. a cross, branch, straight line, or turn) appears in the corresponding row or column, irrespective of the line shape's rotation.
Every orthogonally connected area of cells not visited by the loop network contains exactly one clue, the value of which represents the size of the area. A "?" can represent any non-zero size.
Solution code: For each column except the last, from left to right, the number of lines leading to the right from that column
Comments
on 4. March 2024, 00:45 by The Book Wyrm
Fun and easy.
Nice puzzle, thanks.
on 1. May 2023, 22:22 by Piatato
Lovely, fun puzzle!
on 11. January 2023, 23:39 by Christounet
Very nice logic ! Made me want to try more of these network puzzles. Thanks !
on 7. January 2023, 16:45 by Agent
Cool hybrid, thanks!
on 6. January 2023, 21:19 by MagnusJosefsson
Great fun and easy puzzle!
on 6. January 2023, 07:30 by r45
Sehr schön!
on 5. January 2023, 20:26 by Phistomefel
That was a lot of fun! Thank you for constructing this puzzle, wooferzfg and Jakhob! :)
on 5. January 2023, 13:11 by wisty
This was so much fun! Really well constructed puzzle - tricky at times, but always intuitive and consistent.
on 5. January 2023, 12:37 by Snookerfan
Incredible, but not easy when you are new to this ruleset, as stated by others! Thank you
on 5. January 2023, 10:53 by Niverio
Pretty enjoyable for even a U-bahn rookie like me :)
on 5. January 2023, 03:04 by mathpesto
Very tricky for me having never solved a u-bahn before, but very satisfying. Brilliant construction!
on 4. January 2023, 22:46 by Xendari
this was my first u-bahn, and it was definitely the hardest 2* I’ve ever done, but I enjoyed every second of the hour that took me :)) thank you for the puzzle!
on 4. January 2023, 18:23 by Myxo
Awesome puzzle!
on 4. January 2023, 18:14 by KNT
It’s very hard to get me to want to do a puzzle faster than if you post a U-Bahn hybrid. One of the most fun easy puzzles I’ve done in recent memory
