Logic Masters Deutschland e.V.

Japanese Sum Cave Cipher #11: U-Bahn

(Eingestellt am 18. Januar 2023, 07:32 Uhr von KNT)



Clues to the right and bottom are standard cryptic Japanese sums clues with values 0-9. Same letters stand for same digits, different letters for different digits. As standard, ? stands for any digit 0-9, and no clue may have a leading zero. (Point of clarification: Digits placed in the grid are 1-9)

The empty cells of the Japanese Sums puzzle form a cave: all empty cells are connected and every filled cell is connected to the edge by other filled cells.

Every empty cell must be traversed by a loop network that may branch freely, but may not have any dead ends. Clues to the left and top indicate the number of instances of crosses, branches, straights, and turns of the loop network in the respective row and column. The U-Bahn clues share the cipher with the Japanese Sums.


Below is an example and its solution with the digits 1-6 (and a cipher where A-G replaces 0-6). It can be solved here.


The main puzzle can be solved here. Enjoy!

Difficulty should be high 4 stars with some U-Bahn experience, likely 5 stars without.


Lösungscode: 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.

Gelöst von polar, MagnusJosefsson, Mark Sweep, wooferzfg, Vebby, Jakhob, Niverio, Xendari, Koalagator2, Gliperal, Myxo, Jesper, Zzzyxas, jkuo7, ONeill, Alex, RJBlarmo, Statistica, AnnaTh, ibag, zetamath, rmn, tallcat, ffricke, lerroyy, the_cogito, Piatato, Agent, Jaych, akamchinjir
Komplette Liste


am 3. Mai 2023, 10:37 Uhr von Piatato
Awesome puzzle! Lovely ruleset and great execution :)

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

am 29. Januar 2023, 10:56 Uhr von ibag
Fantastic and with a smooth solving path. Thank you for your creations!

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

am 22. Januar 2023, 23:17 Uhr von ONeill
Brilliant combination, and not overly difficult, thanks :)

am 20. Januar 2023, 08:30 Uhr von Jesper
Wonderful combination, thanks!

am 19. Januar 2023, 14:03 Uhr von Myxo
Awesome puzzle!

am 19. Januar 2023, 00:14 Uhr von Xendari
this puzzle is so sick and twisted and I love it

am 18. Januar 2023, 20:44 Uhr von Niverio
I feel like I was run over by an underground train :p

am 18. Januar 2023, 17:36 Uhr von 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.

am 18. Januar 2023, 17:33 Uhr von Vebby
Brilliant puzzle! Quite challenging for me, 5 stars difficulty imo. Thanks KNT!

am 18. Januar 2023, 13:12 Uhr von Mark Sweep
Gorgeous puzzle!

am 18. Januar 2023, 11:35 Uhr von 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.

am 18. Januar 2023, 07:52 Uhr von polar
Impressive puzzle for your first foray into U-Bahns. Hope to see more! Thoroughly enjoyable - thanks :)

am 18. Januar 2023, 07:33 Uhr von KNT
Thanks to the testers over the past couple weeks on this one :)

Bewertung:100 %
Gelöst:30 mal
Beobachtet:2 mal

Lösung abgeben