U-Bahn Aqre (ft. Christounet)
(Published on 17. January 2026, 00:00 by cyddrdrd)
This puzzle is created by Christounet and rdrd. Working with Christounet is a real pleasure. I really enjoyed our discussions during the setting process, and learned a lot of great setting techniques.
Penpa+
Example puzzle:
Rules
- Aqre: Shade some cells so that all shaded cells form one orthogonally connected area. There may not exist a run of more than three consecutive shaded or unshaded cells horizontally or vertically anywhere in the grid.
- U-Bahn: Draw a totally connected loop network through the centers of some 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. cross, branch, straight line or turn) appears in the corresponding row/column, irrespective of rotation.
- Interaction: Unshaded cells may only contain branches or corners. Shaded cells may only contain crosses or straight lines, or be empty.
Example puzzle:
Solution code: For each column except the last, from left to right, the number of U-Bahn lines leading right from that column
Last changed on on 17. January 2026, 00:03
Solved by Christounet, h5663454, KNT, Piatato, Jesper
Comments
on 18. January 2026, 00:28 by Jesper
Really cool puzzle, thanks!
on 17. January 2026, 09:19 by Piatato
Awesome puzzle! Very fascinating and fun throughout!
on 17. January 2026, 05:25 by KNT
one of my favorite puzzles lately, thank you both!
on 17. January 2026, 00:09 by Christounet
It was a great pleasure to work with you on this first collab. I enjoyed exploring the ruleset with you and am looking forward to our next collaboration(s) !
