Logic Masters Deutschland e.V.

Lying Japanese Cavescraper Ring

(Published on 15. December 2022, 03:02 by KNT)

Place some numbers from 1 to 7 in the unshaded area of the grid such that all numbers in the unshaded area are orthogonally connected, and all orthogonally connected groups of empty cells touch either the inner or outer boundary of the ring. A number must not repeat in any row or column of the unshaded area.

Clues outside the grid indicate the sums of connected groups of numbers in the respective row or column. For each row or column, one of the two provided sets of clues is wholly meaningless and can be ignored. The other provides the complete set of clues for the row or column, but if more than one number is listed, the sums given must not be in order of appearance.

The numbers from 1 to 4 must be placed once each in every row and column of the inner shaded area. Treat each number N as a building of height N. A number placed in the unshaded area that lies adjacent to the shaded area indicates the number of buildings seen in the shaded area from that direction, where taller buildings hide shorter buildings.

SudokuPad

penpa+

Solution code: Row 8, Column 1, S for empty cells

Last changed on on 23. July 2024, 17:33

Solved by polar, Koalagator2, Jesper, marcmees, Myxo, MagnusJosefsson, Vebby, ONeill, PrimeWeasel, Niverio, jkuo7, ch1983, cmb, rhinofifteen, RJBlarmo, Statistica, harrison, AnnaTh, ascension, dunder, ibag, Alex, lerroyy, Gliperal, ffricke, misko, wooferzfg, Martijn314, Jaych, Nensche777, pandiani42, Agent, Piatato, Nick Smirnov, h5663454, Christounet, tuturitu
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Comments

on 10. June 2024, 10:54 by Christounet
Very nice "warm up" puzzle ! Now let me go back to the other one and try it for the third time...

on 28. January 2024, 21:53 by Piatato
Wonderful, looking forward to trying the big one as well!

Last changed on 1. September 2023, 21:34

on 31. August 2023, 15:14 by wildbush7
Can the sum clues span the inner grey area?

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Hi @wildbush7, yes, they can.

on 28. April 2023, 02:31 by wooferzfg
Wow, that was really awesome

Last changed on 26. December 2022, 21:46

on 26. December 2022, 09:41 by AnnaTh
Wonderful puzzle! The grid reminds me of some of ibags very early puzzles on the portal which I also recommend highly.

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If you are referring to ID=0001XI, this indeed draws inspiration from it :). I completely agree, all of her Japanese Sum puzzles are incredible.

Last changed on 19. December 2022, 04:03

on 19. December 2022, 04:02 by KNT
@rhinofifteen:

For the purposes of the cave, the inner 4x4 does not exist, that is, the cave cannot connect through the center.

So to explicitly answer your question, no, it is not like the sums, which may travel through the middle of the grid.

on 18. December 2022, 12:35 by cmb
Great introduction.
Well-chosen clues.

on 18. December 2022, 10:25 by polar
@rhinofifteen:

Each row and column are independent from each other as to which side has the incorrect order and which has the incomplete/incorrect sum(s). Also, incomplete in this case means a side may have too many clues as well.

Last changed on 18. December 2022, 16:49

on 18. December 2022, 05:32 by rhinofifteen
Clarification question: With the "on one side clues are..." does the polarity or outcome of one row affect the other rows? e.g. If R1 has the incorrect order on the left and the incorrect value on the right, does that mean all rows necessarily have the incorrect order on the left and the incomplete/incorrect hint on the right?

Thanks! It's a fun puzzle already but I can tell it and the big one will take some time!

@polar
Thanks! That helps a lot!

on 15. December 2022, 21:00 by PrimeWeasel
Treacherous mini minefield

on 15. December 2022, 17:17 by ONeill
Wonderful puzzle!

on 15. December 2022, 13:04 by MagnusJosefsson
Great puzzle! Really looking forward to the bigger one!

on 15. December 2022, 11:34 by Myxo
The hardest puzzle of all time. On a serious note, great job!

on 15. December 2022, 10:37 by marcmees
I made quite a number of beginners mistakes. Glad this is just an example :-). I feel I'm ready now for the "real" one. thanks

on 15. December 2022, 07:23 by Koalagator2
Fantastic puzzle! Can't wait for the full version.

on 15. December 2022, 04:25 by polar
Enjoyed that example a lot - the lack of cipher allows for a much smoother introduction thanks :)

Last changed on 15. December 2022, 04:23

on 15. December 2022, 02:55 by KNT
I typically am not too sentimental about puzzles, but the follow up puzzle to this, is, without question, my favorite creation to date. Setting the puzzle consumed a great portion of my November and I am exceedingly happy with almost all aspects of it.

This example should be a very smooth 3 star ride, but I have listed this as 4 because the concept of incorrectly ordered Japanese Sums may feel unfamiliar. I hope you enjoy this, and decide to give the follow up a try :)

Difficulty:4
Rating:99 %
Solved:37 times
Observed:3 times
ID:000CBP

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Solution code:

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