Logic Masters Deutschland e.V.

QQCC

(Published on 24. February 2026, 16:59 by mellowrobinson)

This puzzle was set for Scojo's Setting Saturdays Prompt which called for quadruple clues with duality clues. Thanks to all testers, and I hope you enjoy!

  • Divide the grid into regions so that every row, column, and region contains the digits 1-6 once each.
  • The digit in the top-left cell of a region (its leftmost cell in its highest row) is its region number. All region numbers are different.
  • N in a circle clue indicates that both region N and the digit N appear in the surrounding cells at least as many times as it is in the clue.

Solve on Sven's Sudokupad




Solution code: Row 5


Solved by HeyItsErin, Felis_Timon, Zibl, Lor, ChinStrap, CauchySchwarz, gdc, karlmortenlunna, emoney1374, MaizeGator, Myxo, zrbakhtiar, rsc, SecondBlue, OnkelPhilip, SKORP17, tryote, ryan_campbell2010, dzamie, ... theaaronbomb, Jesper, marajade, thintheboxking, dogfarts, yttrio, Elliptical, Frutlop, thoughtbyte, eggig, gnidan, Nootato, benvegmond, gadgetgreen, Frank Puzzles, roco, kangaroo, natti, hirassy
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Comments

on 8. April 2026, 12:11 by Nootato
Amazing puzzle! Took some time for me to figure out the ruleset for the circle double-clues, yet still an amazing solve all throughout. 44:44

on 13. March 2026, 09:59 by Jesper
Very nice!

on 10. March 2026, 17:58 by SennyK
Lovely puzzle, so much fun! :-)

on 8. March 2026, 03:13 by KNT
cool!

on 3. March 2026, 00:45 by Jorrr2
I don't think this was particularly easy actually, in my humble opinion. But very nice!

on 1. March 2026, 20:25 by Nell Gwyn
I am amazed this is unique with such a short ruleset and only four clues.

on 25. February 2026, 14:10 by rojspencer
Top notch puzzle. Really enjoyable.

on 25. February 2026, 08:24 by Sinuit
Very cool! I was constantly hoping to make the right deductions and not mixing up digits and rules. The more satisfying it is when it resolves. Thanks for creating and sharing!

on 24. February 2026, 21:15 by tryote
gorgeous!

on 24. February 2026, 19:54 by Myxo
Cool!

Last changed on 24. February 2026, 20:00

on 24. February 2026, 19:46 by MaizeGator
Damn you Mellow! I swear that I had the same idea for this prompt of a CC with numbered regions that are referenced by Quad clues. You've scooped me!

--

Oh no, I'm sorry! :'(
You should still make one, I'd love to see it! Or make one with TRB cells instead, I was unable to pull that variation off cleanly :)

on 24. February 2026, 18:40 by Lor
Nice flow.
I like the idea of encountering new rules in a smaller grid; lets me absorb the implications faster.

on 24. February 2026, 17:59 by Zibl
It's a fantastic puzzle, thank you mellowrobinson! :)

Difficulty:2
Rating:98 %
Solved:111 times
Observed:5 times
ID:000RMF

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Solution code:

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