Logic Masters Deutschland e.V.

Hochhäuser mit Kellern, Teil 3

(Published on 3. July 2015, 18:00 by pirx)

Place buildings in the cells of the left grid. Some buildings have a basement, i.e. their visible height is reduced by exactly 1. For example, only three levels of a 4-building are visible, a 1-building is not visible at all.
The corresponding cells of the right grid contain the basements, which form a cave.

Skyscrapers (left grid)
Each row or column contains different digits from 1 to N (N is the grid size). A digit represents the number of levels of a building.
Clue numbers outside the grid indicate how many buildings are visible from that direction. A building blocks the view of buildings behind it that are of equal or lower height.

Cave (right grid)
A cave system must be found in the grid, that is, some cells must be shaded such that the following conditions are satisfied.
  • The interior of the cave (the white cells) is horizontally and vertically connected,
  • The walls (all the shaded cells) are connected with the boundary of the grid,
  • All cells containing a number are inside the cave; the number indicates how many cave cells can be seen horizontally and vertically from that position, including the cell with the number itself,
  • No 2x2-field is completely inside the cave.

Part 1 gives an example.



Puzzle:

Solution code: The visible heights of the buildings in the two main diagonals, at first from upper left to lower right, then from upper right to lower left.

Last changed on -

Solved by r45, Luigi, Alex, ch1983, matter, fridgrer, Joe Average, AnnaTh, Statistica, RALehrer, jalbert, ibag, tuace, uvo, pin7guin, jhrdina, zorant, Resu, rob, uko50, ffricke, dm_litv, zuzanina, Zzzyxas, ildiko, pandiani42, ManuH, marcmees, jirk, ChristJan, polar, Myxo, lerroyy, Agent
Full list

Comments

on 30. May 2023, 18:47 by Agent
Great puzzle and idea, brutal but rewarding.

on 26. February 2023, 03:23 by polar
Totally mind bending puzzle. Beautiful but very challenging indeed!

on 12. March 2016, 12:20 by dm_litv
5 times - the same contradiction.
Only in sixth attempt I have found my incorrect logical conclusion.
Super puzzle!

on 11. February 2016, 08:19 by uko50
Sehr gute Idee. Damit habe ich jetzt auch mein erstes Hoehlenraetsel geloest.

on 19. January 2016, 00:15 by rob
Super. Etwa vier mal zum Widerspruch geführt.

on 13. August 2015, 00:08 by pin7guin
Richtig gut und richtig schwer!
- Wir sind auch gemeinsam den Widersprüchen nur knapp entronnen...

on 17. July 2015, 14:36 by AnnaTh
@ibag: andauernd ;-) -- @pirx: Wirklich ganz tolle Rätsel!

on 17. July 2015, 13:48 by ibag
Wirklich grandios!

Ich hab mich fast zwei Wochen lang mit dem Rätsel regelrecht abgemüht, bevor ich auf die Idee kam die Regeln nochmal zu lesen. Hatte das mit den 2x2-Feldern völlig vergessen, mit dieser Regel ging es plötzlich sehr viel besser. Oh man, passiert sowas anderen eigentlich auch manchmal?

on 9. July 2015, 08:19 by Statistica
Ganz großartig! Und in gewohnter pirx-Qualität :-) Vielen Dank!

Last changed on 7. July 2015, 21:28

on 7. July 2015, 21:28 by Joe Average
Auf meiner Arbeitsstelle sind tatsächlich die Etagen im Aufzug und in einem Treppenhaus mit 0-3 nummeriert, während alle anderen Treppenhäuser die Zahlen 1-4 verwenden. Das hat mir wahrscheinlich beim Lösen des Rätsels sehr geholfen. :-)

on 4. July 2015, 12:53 by Alex
sehr clever und super spannend

on 4. July 2015, 01:26 by r45
Genial!

Difficulty:5
Rating:99 %
Solved:34 times
Observed:3 times
ID:0002A0

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