P-Bahn (Pentominous U-Bahn)
(Published on 25. July 2025, 09:00 by Agent)
Rules
- 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. a cross, branch, straight line, or turn) appears in the corresponding row or column, irrespective of the line shape's rotation.
- Pentominous: Divide the grid into non-overlapping pentominoes such that every cell is part of a pentomino. Orthogonally adjacent pentominoes may not be the same shape, regardless of rotation or reflection. A cell with a letter indicates that it belongs to the pentomino of the corresponding shape.
- Interactions:
- The line segments emerging from a cell may cross at most 2 pentomino borders.
- The loop network must cross the borders of every pentomino exactly 3 times.
Solution code: For each row except the last, from top to bottom, the number of lines leading down from that row.
Comments
on 14. October 2025, 03:35 by MaizeGator
Ooops! Agent did it again
on 10. August 2025, 19:33 by lupo
Toll!
on 8. August 2025, 19:24 by sfushidahardy
Beautiful, theoretical puzzle! Super smooth once I figured out how to think about it.
on 8. August 2025, 07:10 by Christounet
Exceptional puzzle! Everything here, the symmetric design, the inner logic of the ruleset, the placement of the clues, the satisfying resolution, is just perfection. Another masterpiece in your catalogue. A must solve. Thanks :)
on 6. August 2025, 13:43 by ibag
Wow!!!!!! One of the greatest puzzles I ever solved!!!
on 5. August 2025, 10:39 by MagnusJosefsson
Wonderful puzzle, very fun and original combination!
on 26. July 2025, 00:00 by cyddrdrd
This version is really smooth and I enjoyed a lot!
on 25. July 2025, 16:00 by the_cogito
Loved this, awesome puzzle!
on 25. July 2025, 12:19 by Jesper
Fantastic puzzle, thanks!
on 25. July 2025, 10:04 by Piatato
Awesome puzzle!
