Logic Masters Deutschland e.V.

Modular Shhhtaples

(Published on 27. July 2024, 06:12 by FullDeck-Missing)

Normal sudoku rules: Every row, column, and box must contain a complete set of the digits 1-9.

Ratio Dots: Digits separated by a black dot are in a 1:2 ratio. Not all possible dots are necessarily shown.

All lines in this puzzles are BOTH German Whisper AND Modular Lines.

German Whispers: Adjacent digits along a German Whispers line must differ by at least five.

Modular lines: Any set of three adjacent digits along a modular line has three different remainders when divided by 3.

A note about difficulty: On our website, Missing Deck Puzzles, we categorize our puzzles as

  • Brassica
  • GAS
  • Mild Indigestion
  • Indigestion
  • Strong Indigestion
  • Heartburn
We generally only post on LMD our Indigestion or Heartburn puzzles, with Indigestion usually corresponding roughly to 1-2 stars on LMD and Heartburn anywhere from 2-4 stars on LMD. We don't typically share here our GAS or Brassica puzzles but please go explore our archive if you'd like to see some of those! GAS corresponds to the original daily GAS puzzles, where "hats" were awarded for times on the order of 5-10 minutes. Brassica puzzles are intended to be much easier, suitable for beginning solvers.

We categorized this puzzle as Heartburn.

Try the puzzle on the SudokuPad app by Sven Neumann.

You can find a complete list of our puzzles on LMD here. Please also visit us at Missing Deck Puzzles, where we post a new puzzle each day.

Solution code: Row 9, left to right, 9 digits no spaces

Last changed on -

Solved by jalebc, WatermeRen, coolguy14, LehanLehan, GorgeousNicko, teuthida, pythonssssss, fuxia, Myxo, DanishDynamite, cmigas, MonsieurTRISTE, japanoise_breakfast, SKORP17, Basil, ecavalli, achim-t, ... radium, actiondirecte, bbutrosghali, geronimo92, deangaudet, 99jau99, JohnDoeJersey, W1n5t0n, ManuH, Onyx, RiGri, mietepiet, diziet, Jodelbanane, Carolin, Uhu, Krisonium, TaeChi, Madoka42, vmirandaa
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Comments

on 4. August 2024, 13:56 by Hay-in-needlestack
Those combined lines are surprisingly constrained so a little precalculation helps quite a lot.

on 30. July 2024, 18:44 by GandalfLeRouge
I don't know if I did that right, but my computer engineer brain made me list every possibility regarding the line constraints. Quite exhaustive, but quite rewarding in the end, that helped a lot! Not easy though, I nearly failed two or three time xD

In the end, it was really enjoyable puzzle to solve! Would 100% recommend it to someone with the same brain as me haha

Last changed on 30. July 2024, 16:40

on 30. July 2024, 16:39 by miranda_9
What a beautiful puzzle. The coulours show the path.... Thanks

on 30. July 2024, 13:32 by wacfwaef
Fun puzzle combining german whispers and mod lines.

I don't agree with Jakey, the one in box 2 does actually work and it's, in my opinion, how you start the puzzle.

Using the knowledge and secrets from both german whispers and mod lines combined you can get there.

I do agree though that 3* suits better the difficulty of the puzzle.

on 29. July 2024, 16:31 by BaumJames
Awesome blossom

on 29. July 2024, 11:28 by VitP
advice to noobs, to avoid medical problems:
a) the modular staples have a critical property. find it, and use it.
b) sudoku is your friend

Last changed on 29. July 2024, 18:28

on 29. July 2024, 10:40 by jakeykayy
So how exactly does the line in Box 2 follow the modular line rule set? I spent a lot of time filling it out (this is much harder than a 2 star by the way), checked it, and it was wrong. The digits that actually fill out the line do NOT follow the modular line rule set as I understand them. I did not complete the puzzle, so I can't speak for the other lines. Perhaps I'll give it another try if someone can explain to me how those digits on that line satisfy the modular line rule.

>> We will take our best shot at addressing this without seeing your actual grid. If we're way off base (or even if we're not) feel free to reach out to us using the email link on our website, or ping us in Discord (full_deck or missingafewcards) and we can be of more direct assistance.

We suspect the issue may be with interpretation of "adjacent along the line." Thinking of the staple in box 2 particularly, r1c4 is adjacent to r2c4 along the line but is NOT adjacent to r1c5 along the line. So r1c4, r2c4, and r2c5 form a set of cells whose digits must have different remainders when divided by 3 since those three cells are adjacent along the line. Similarly, r2c4, r2c5, and r1c5 are a set of three cells adjacent along the line so must have digits with three different remainders when divided by 3. However, r1c4 and r1c5 are NOT together in a set of three digits adjacent along the line.

on 29. July 2024, 07:13 by Mango36
I really enjoyed this. Harder than 2*.

on 28. July 2024, 16:18 by GeorgeTheToad2
Very entertaining puzzle and not too difficult. Thank you for sharing.

on 28. July 2024, 11:48 by Snaques
What a lovely puzzle. It's interesting how constraining this ruleset really is.

It's also interesting how I could see this being 1/5 at LMD, while still being really challenging somewhere else.

on 27. July 2024, 14:32 by Myxo
Lovely!

on 27. July 2024, 09:09 by GorgeousNicko
Love this. Feel I learned some useful stuff about the modular constraint more generally. Thanks!

Difficulty:2
Rating:96 %
Solved:115 times
Observed:1 times
ID:000J26

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