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.
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| Previous Constraint Region Puzzles |
| Regional Constraints |
| Foggy Regional Constraints |
| The Helpful Quad |
Solution code: Column 5
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!
