Logic Masters Deutschland e.V.

Crypto Japanese Cave-Bahn

(Published on 18. January 2023, 07:32 by KNT)

Shade some cells in the grid such that all unshaded cells are orthogonally connected, and all orthogonally connected groups of shaded cells touch the perimeter of the grid. Then, enter numbers from 1 to 9 in every shaded cell such that no number repeats in a row or column. Numbers must not be placed in unshaded cells.

Clues outside the grid indicate the sums of connected groups of numbers in the respective row or column, in order, where unshaded cells serve as delimeters between groups.

Draw a totally connected loop network through the centers of all unshaded 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.

The letters A to J replace the numbers from 0 to 9, and no two letters may replace the same number. A question mark can be any number from 0 to 9, and for all clues, none may have a leading zero.

A 1-6 example is provided:

SudokuPad

penpa+

Solution code: Row 8, then Column 12. C for corner piece, S for a straight segment, J for a junction, and X for a crossing, otherwise the digit.

Last changed on on 19. July 2024, 18:06

Solved by polar, MagnusJosefsson, Mark Sweep, wooferzfg, Vebby, Jakhob, Niverio, Xendari, Koalagator2, Gliperal, Myxo, Jesper, Zzzyxas, jkuo7, ONeill, Alex, RJBlarmo, Statistica, AnnaTh, ibag, zetamath, rmn, ... lerroyy, the_cogito, Piatato, Agent, Jaych, akamchinjir, Uhu, ClashCode, chalk235, Paletron, misko, dunder, Nensche777, tuturitu, Joe Average, Christounet, Nick Smirnov, XIAOYING, h5663454, Bellsita
Full list

Comments

on 22. January 2024, 13:25 by Christounet
Very nice ! And not that hard indeed with some basic u-bahn knowledge. Thanks :)

on 3. May 2023, 10:37 by Piatato
Awesome puzzle! Lovely ruleset and great execution :)

on 25. February 2023, 04:50 by zetamath
Definitely my new favorite KNT puzzle. But what is with making me enter a novel for the solution code?

on 29. January 2023, 10:56 by ibag
Fantastic and with a smooth solving path. Thank you for your creations!

on 24. January 2023, 04:44 by RJBlarmo
Fantastic puzzle, ended up being one of the more challenging ones for me as I am new to U-Bahns.

on 22. January 2023, 23:17 by ONeill
Brilliant combination, and not overly difficult, thanks :)

on 20. January 2023, 08:30 by Jesper
Wonderful combination, thanks!

on 19. January 2023, 14:03 by Myxo
Awesome puzzle!

on 19. January 2023, 00:14 by Xendari
this puzzle is so sick and twisted and I love it

on 18. January 2023, 20:44 by Niverio
I feel like I was run over by an underground train :p

on 18. January 2023, 17:36 by wooferzfg
This puzzle is a ton of fun, with a lot of surprising deductions.

Also, I think the U-Bahn aspects of the puzzle aren't brutally difficult, so I'd recommend this puzzle even to solvers who are somewhat new to the genre.

on 18. January 2023, 17:33 by Vebby
Brilliant puzzle! Quite challenging for me, 5 stars difficulty imo. Thanks KNT!

on 18. January 2023, 13:12 by Mark Sweep
Gorgeous puzzle!

on 18. January 2023, 11:35 by MagnusJosefsson
I tested this for KNT and found it to be a fantastic puzzle. Really fun and orginial hybrid with a lot of thought-provoking and creative logic. Top 2 in the series for me for sure.

on 18. January 2023, 07:52 by polar
Impressive puzzle for your first foray into U-Bahns. Hope to see more! Thoroughly enjoyable - thanks :)

on 18. January 2023, 07:33 by KNT
Thanks to the testers over the past couple weeks on this one :)

Difficulty:5
Rating:99 %
Solved:44 times
Observed:5 times
ID:000CN5

Enter solution

Solution code:

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