Logic Masters Deutschland e.V.

Regional Constraint Rally

(Published on 12. May 2025, 21:06 by Belamis)

Sudoku: Normal Sudoku rules apply.

Kropki: Digits in cells separated by a black dot have a 1:2 ratio.

Killer: Digits do not repeat in cages, and sum to the small clue in the top left corner if given.

Thermo: Digits along a thermometer must increase from the bulb to the tip.

Dutch Whispers: Along orange lines, digits must differ from their neighbors by at least 4.

German Whispers: Along green lines, digits must differ from their neighbors by at least 5.

Parity: Along a red line, adjacent digits must alternate between odd and even.

Constraint Regions: Each constraint type may contain no repeated digits anywhere in the puzzle. E.g. If one Thermo contains a 5, then no other Thermo may contain a 5 etc.

Fog of War: The grid is partially covered in fog. Correctly placing digits will clear the fog around that cell. No guessing is required.

SudokuPad link

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Previous Constraint Region Puzzles
Regional Constraints
Foggy Regional Constraints
The Helpful Quad

Solution code: Column 5


Solved by thoughtbyte, Willkimo, shartus, LehanLehan, kublai, GrumpyMan, pmatos, ad1643, Matti64, meeeteor, sujoyku, idanz, Myfyr MJ, josemadre, fuxia, SKORP17, sarabtx, crunchie, milxqueen, spamus, ... PatientMustard, Crusader175, Swevery, Jrgamer4u, kelleykavanaugh, ParaNox, Selsted, ThirdWiseMonkey, Eierkopp121, imb, adam001, Drafuf, moss1312, jakeyks, TommyHMBK, september, hyea, louie.lly
Full list

Comments

on 7. June 2025, 21:38 by saxdaddyj
Wonderful puzzle. Thanks!

on 22. May 2025, 17:17 by PinkNickels
Beautiful setting. Bravo.

on 21. May 2025, 08:48 by Lovejoy
Delighted to see - given they number of solvers - that I'm not the only one who had you on my favourite setters list

on 18. May 2025, 23:11 by matthewrtims
The trickiest part was the break-in. The rest was pretty straightforward as long as you kept track of details. And very enjoyable :)

on 18. May 2025, 01:21 by JoeyJoeJoe
00:38:57 for me Well done on having 12941 solve on Sven's sudoku pad - that is the most popular I have ever seen.

on 16. May 2025, 10:05 by Stingrayy
Ok puzzle, but very strong use of dynamic fog. So not really solving a sudoku but rather tracing the one solving path.

on 16. May 2025, 09:56 by SirRanch
Excellent beginner puzzle!! I have solved some of your other regional constraint puzzles and it's always such a pleasure. Thank You

on 16. May 2025, 07:24 by PancakePie
Love this constraint! Wonderful build and beautifully placed. Fun to solve too! Thank you for this gift.

on 14. May 2025, 20:13 by dzamie
Took me a little to get the first digit, but once I did, the rest flowed easily and in a satisfying manner.

on 14. May 2025, 20:06 by jcg5a
One of the most beautiful puzzles I've completed recently. Don't forget about the constraint and it just flows once you get the break in.

on 13. May 2025, 15:37 by Snaques
Very fun puzzle, but to me this is an easy-ish 1*.

on 13. May 2025, 14:59 by Chris4927
Beautiful break in. I love this ruleset!

on 13. May 2025, 13:30 by Kirra
@sicario. I found the rule "the constraint regions rule the most helpful to make progress.

on 13. May 2025, 13:30 by Kirra
@sicario. I found the rule "the constraint regions rule the most helpful to make progress.

on 13. May 2025, 13:24 by Kirra
Stumped me for a bit till a saw the break in thankyou for a most enjoyable puzzle.

on 13. May 2025, 03:32 by Sicario
Completely stumped after a few minutes.

on 13. May 2025, 00:05 by Myfyr MJ
Very nice and a lovely flow.

on 12. May 2025, 23:40 by sujoyku
Lovely approachable puzzle. Thank you, Belamis!

Difficulty:1
Rating:96 %
Solved:409 times
Observed:5 times
ID:000NC6

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Solution code:

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