Logic Masters Deutschland e.V.

HöhlenSTIL

(Published on 21. July 2024, 21:00 by Phistomefel)

This puzzle is a combination of a cave and a LITS puzzle. Each wall as well as the inside of the cave count as a region for the LITS puzzle. Here are the exact rules:
  1. Shade some cells in the grid such that all unshaded cells (the inside of the cave) are orthogonally connected to each other and all shaded cells (the walls) are orthogonally connected to the edge of the grid. Clues are unshaded and indicate the number of unshaded cells seen in the four orthogonal directions, including itself. Shaded cells obstruct vision.
  2. After the cave puzzle is solved, the cave and the walls each can be seen as a region. Use these regions as basis for a LITS puzzle.
  3. Place one tetromino into each region. No two tetrominoes of the same shape may share an edge - reflections/rotations count as the same shape. All tetrominoes must form a single connected area. No 2x2 area of the grid can be completely covered in tetrominos.
The puzzle is also available online via Penpa Plus. For the solution check to work, please mark the wall cells in gray, dark gray or black and draw in each tetromino as a line. Have fun solving!

Solution code: Row 7 and column 8: For each tetromino cell the according letter, X for a wall cell and H for a cell inside of the cave.

Last changed on on 31. July 2024, 21:51

Solved by RJBlarmo, Niverio, Mark Sweep, Paletron, tuturitu, h5663454, KNT, Christounet, jkuo7, r45, Agent, bernhard, Jesper, cmb, shadow-nexus, MaizeGator, Jds2, misko, harrison, Alfred, astronixia, ... giladooshlon, Mennoo_, P12345, SirRookie, SudokuHero, IcyFruit, jinkela114514, juventino188, madhupt, dustpan, redaid113, QuiltyAsCharged, Samish, akamchinjir, redfoot, TheZwierz, Uhu, puzzler05
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Comments

on 14. September 2024, 00:37 by Samish
Brillant idea! once you understand the core logic, it becomes a delicious snack. Thanks :)

Last changed on 6. September 2024, 06:47

on 6. September 2024, 00:30 by mse326
I don't understand what the solution code is meant to be. I'm pretty sure I have the puzzle right, so I think that is why I can't get it. Can anyone explain?
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You go through row 7 from left to right and then through column 8 top to bottom. If a cell contains an L-tetromino, write L into the solution code. If it contains an I-tetromino write I and the same for T- and S-tetromino. If the cell does not contain a tetromino and is part of the wall write X. If it does not contain a tetromino and is in the cave, write H.
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Ah ok. Thank you. Great puzzle

on 26. July 2024, 18:35 by Phistomefel
Changed the solution code due to difficulties on the phone.

on 24. July 2024, 11:36 by Jesper
Lovely, thanks!

on 23. July 2024, 20:52 by Phistomefel
Thanks a lot for giving this puzzle a go and for the warm feedback! (:

on 23. July 2024, 16:12 by r45
:-))

on 23. July 2024, 06:12 by Phistomefel
Changed Penpa link.

on 21. July 2024, 23:59 by Mark Sweep
That was simply awesome!

on 21. July 2024, 23:18 by Niverio
After understanding the core implications of the puzzle I think it is more intuitively solvable than purely logically :)

on 21. July 2024, 22:53 by RJBlarmo
Very clever ideas in this puzzle!

Difficulty:3
Rating:97 %
Solved:57 times
Observed:2 times
ID:000J1E

Puzzle combination Shading puzzle Tetrominoes

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Solution code:

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