CTC U-Bahn Guest Series Extras: Extra Region U-Bahn
(Published on 19. May 2025, 11:54 by KNT)
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.
In the gray ring, every possible line shape must occur exactly once in every possible orientation (one empty cell, one cross, four branches, two straight lines, and four turns). The possible line shapes are shown to the right of the puzzle.
SudokuPad
Solution code: For each row except the last, the number of lines leading down from that row
Comments
on 13. November 2025, 12:37 by Playmaker6174
Wow that was rather a mindblowing puzzle overall!
Took me like almost forever to grasp the main logic in the middle without like excessive bifurcations, and despite running into wrong conclusions at some point, I managed to recover and finally achieve the desired breakthrough x)
on 20. August 2025, 13:18 by cyddrdrd
Superb break-in!
on 23. July 2025, 21:57 by MaizeGator
Immensely rewarding solve path. I struggled at first but eventually pared options back enough to break the dam and it flowed very nicely after that.
on 2. July 2025, 19:42 by Oripy
You managed to pack so much logic in this!
on 4. June 2025, 21:21 by Agent
Very cool!
on 24. May 2025, 18:41 by Piatato
Fun!
on 22. May 2025, 11:55 by ibag
Tolle Serie!
on 20. May 2025, 19:37 by Zzzyxas
Da kommen Erinnerungen hoch.
on 19. May 2025, 19:44 by Myxo
Wow, that was surprisingly tough! And very nice.
