Logic Masters Deutschland e.V.

Suguru Chaos Deconstruction #4: Renban + Japanese Sums

(Published on 7. March 2022, 17:30 by mathpesto)

This is my fourth installment in my Suguru Chaos Deconstruction series! The ruleset is a bit more complex than I usually aim for, but if you've done Japanese Sums before and you've done one of my previous puzzles in the SCD series before, it's not too hard to understand. (Do let me know if you have any suggestions for making the rules clearer!) I've also included a mini-example and a walkthrough of the solution if you'd like some help. Also, shoutout to @henrypijames for testing the puzzle and providing feedback! Comments and ratings are much appreciated, and please be sure to check out my other puzzles here.


Rules:

Fill some cells in the main 12x12 grid with the digits 1–9 such that no digit repeats in a row or column. Cells with a square or line must have a number in them. Cells with a gray square contain an even number. A purple line contains a set of non-repeating, consecutive numbers (in any order).

Deconstructed Suguru: All digits within the main grid must belong to a region (a collection of orthogonally connected cells). A region of size n contains the digits 1 through n once each. Regions may not touch each other orthogonally, although they may touch each other diagonally.

Japanese Sums: Outside the 12x12 grid, the nth number in a row/column is a clue that corresponds to the nth block of contiguous digits within the main grid for that row/column. Those contiguous digits sum to that corresponding clue. Blocks must be separated by at least one empty cell. The amount of clues for a particular row/column is exactly the number of white cells outside the grid for that row/column. Numbers outside the main grid can repeat within a row/column, can be greater than 9, and do not belong to any regions.


Solve on F-Puzzles

Solve on Cracking the Cryptic

Solve on Penpa+ (thanks Vebby)

SPOILER ALERT Walkthrough of Solution


Puzzle:


Mini-example, where the main grid is 4x4 instead of 12x12 and the digits 1–3 are placed instead of 1–9:
Solution to mini-example and explanation of solution:
Within the main 4x4 grid, the digits 1, 2, and 3 appear at most once in each row and column. The gray square contains an even number, 4. Our three purple lines all contain a set of consecutive numbers: 2 and 1, 4 and 3, and 3 and 2.
Deconstructed Suguru: The orange region is a one-cell region containing the digit 1. The green region is a two-cell region containing the digits 1 and 2. The red and blue regions are three-cell regions each containing the digits 1, 2, and 3.
Japanese Sums: Row 1 has exactly two contiguous blocks of digits in the main grid summing to 1 and 2 in that order. Row 2 has exactly two contiguous blocks of digits in the main grid summing to 2 and 4 in that order. Row 3 has exactly one contiguous block of digits in the main grid summing to 4. Row 4 has exactly one contiguous block of digits in the main grid summing to 3. Column 1 has exactly one contiguous block of digits in the main grid summing to 3. Column 2 has exactly two contiguous blocks of digits in the main grid summing to 1 and 3 in that order. Column 3 has exactly two contiguous blocks of digits in the main grid summing to 1 and 2 in that order. Column 4 has exactly two contiguous blocks of digits in the main grid summing to 5 and 1 in that order. Note that for the clues outside the main grid, we have repeated numbers in rows and columns, numbers greater than 3, and these numbers do not belong to regions.


Solution code: Ignoring blank cells, enter the digits in Rows 6 and 7 of the main 12x12 grid (left to right, no spaces)

Last changed on on 30. December 2022, 19:36

Solved by SKORP17, Jesper, pianobarry87, tubahat, Dentones, rmn, harrison, henrypijames, thrap, DillyK, marcmees, MagnusJosefsson, matiasv5, Mody, harryjbeer, galgamer, Jds2, RJBlarmo, kolot, Krokant, ... widjo, fluffy, KevinTheMH, lovely7998, MorganLeah, konklone, Counterfeitly, P12345, Unknown, nottabird, pentadream, zakkai, Jodelbanane, teff, ONeill, starelev5, Snookerfan, heliosfant, Calvinball
Full list

Comments

on 9. January 2024, 01:48 by heliosfant
Thanks so much for this puzzle. I enjoyed it very much.

Last changed on 12. April 2023, 06:53

on 12. April 2023, 06:52 by Mikemerin
Out of the 7 of your Suguru puzzles this one is definitely my favorite (just above 1,729). The interactions between the grid and outer sums via the renban lines were extraordinarily fun to work through.

Edit: actually I just noticed you have an 8th with the Kakuro Suguru! Onto that one next

on 30. December 2022, 19:36 by mathpesto
Added penpa+ link

Last changed on 19. August 2022, 11:31

on 18. August 2022, 12:56 by StephenR
Phew, possibly my favourite of the five. Can't begin to imagine how mathpesto comes up with these puzzles. Now I've done them all, I'm bereft.

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Thank you so much for solving and commenting on all of these! I'm glad to hear you've been enjoying them. If you're interested, I do have a few more in the series that didn't have SCD in title. Here are the puzzle IDs: 0009JO, 0009HP, 0009PB, 000A9S, 000AEQ -Math Pesto

It's my pleasure. Thanks for the links. Actually just realised I hadn't done no. 5 which was a bonus.

on 18. April 2022, 13:17 by Hausigel_mod
Labels/Tags changed (in particular Sudoku replaced by Suguru)

on 13. April 2022, 21:42 by Bankey
Extremely tough one, but feels good to have finished it. Thanks, @ mathpesto :)

Last changed on 30. March 2022, 00:35

on 29. March 2022, 23:12 by Bootenks
10/10 beautiful deductions
10/10 joy
10/10 hope that you will create more of this xD

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Bootenks: Why thank you! -mathpesto

Last changed on 25. March 2022, 12:07

on 25. March 2022, 11:11 by Christounet
Yay, i did it and it was absolutely great ! Another delightful installment in this impressive serie. How you come up with these intricate yet beautiful constructions is beyond my understanding... Hats off ! And onto the next one...

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Thank you so much! -mathpesto

on 22. March 2022, 19:05 by mathpesto
Removed unnecessary renban line.

on 11. March 2022, 15:20 by Krokant
Fun all around. This is such a fantastic series. :)

on 8. March 2022, 17:06 by matiasv5
Yaaaaay another one of these! Always so good, thank you! 5 stars might be a overstatement, though.

on 8. March 2022, 15:33 by MagnusJosefsson
Very nice, all of these have been very enjoyable.

on 7. March 2022, 21:01 by tubahat
I have tried all of these suguru chaos deconstruction puzzles — first one I managed to solve! All of them have been the best ever though and I can't wait for the next one

on 7. March 2022, 20:52 by pianobarry87
These are quite fun! Thanks!

on 7. March 2022, 19:07 by Jesper
Very nice!

Difficulty:5
Rating:96 %
Solved:93 times
Observed:3 times
ID:0009AW

Variant combination Online solving tool

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Solution code:

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