Cedar Key (U-Bahn Nurikabe)
(Published on 10. October 2026, 18:47 by MaizeGator)
Rules
U-Bahn
Draw a loop network through the centers of some cells, which may branch or turn, but may not have any dead ends. A number 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.
Draw a loop network through the centers of some cells, which may branch or turn, but may not have any dead ends. A number 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.
Nurikabe
Shade some cells such that all shaded cells are connected and no 2×2 area is fully shaded. Unshaded cells form orthogonally connected groups called “islands”. Each island contains at most one numerical clue, which gives the number of cells belonging to the island.
Shade some cells such that all shaded cells are connected and no 2×2 area is fully shaded. Unshaded cells form orthogonally connected groups called “islands”. Each island contains at most one numerical clue, which gives the number of cells belonging to the island.
Interaction
The “shoreline” (perimeter) of each Nurikabe island is crossed exactly once by the U-Bahn network.
The “shoreline” (perimeter) of each Nurikabe island is crossed exactly once by the U-Bahn network.
Solution code: For each row except the last, the number of lines in the U-bahn network going down to the row below.
Last changed on on 10. October 2026, 19:45
Solved by Agent, Christounet, Jesper, Fusce, MagnusJosefsson, h5663454, Piatato, Mr_tn, ONeill
Comments
yesterday, 02:00 by ONeill
Cool, thank you :)
on 12. October 2026, 09:37 by Piatato
Amazing! :D
on 11. October 2026, 03:20 by MagnusJosefsson
Brilliant puzzle, some very cool moments!
on 10. October 2026, 21:18 by Jesper
Wonderful puzzle, thanks!
on 10. October 2026, 19:14 by Christounet
Excellent hybrid! Loved the connectivity deductions with this ruleset. Thanks :)
on 10. October 2026, 18:51 by Agent
Great puzzle, very interesting connectivity and island placement logic resulting from the combination of rules!
