Breadcrumbs
(Published on 15. June 2025, 12:41 by Belamis)
Sudoku: Normal Sudoku rules apply.
Dynamic Fog: The grid is partially covered in dynamic fog. The first correctly placed digit on each constraint will remove fog from other cells.
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.
Parity: Along a red line, adjacent digits must alternate between odd and even.
Killer: Digits do not repeat in cages, and sum to the small clue in the top left corner if given.
Kropki: Digits in cells separated by a black dot have a 1:2 ratio.
Zipper: Pairs of digits equidistant from the center of a lavender zipper line must sum to the digit in the middle of that line (noted by a dot).
Thermometer: Digits along a thermometer increase from bulb to tip.
Minimum: Cells with arrows pointing inward must be smaller than all other cells that share an edge.
Even: A digit in a grey square is even.
Each listed constraint type appears at least once in the puzzle.
-------------------
| Previous Constraint Region Puzzles |
| Regional Constraints |
| Foggy Regional Constraints |
| The Helpful Quad |
| Regional Constraint Rally |
| Knotted Regional Constraints |
Solution code: Row 3
Comments
on 1. August 2025, 05:02 by Lovejoy
2 hrs 10 minutes spread over a few days and my brain is fried. Great puzzle as always
on 12. July 2025, 22:17 by TheNineElements
Solve Time: 25:04
I rated this 3/5 difficulty
Great puzzle! Really enjoyed the ruleset, and, while I did foresee the ending during my reading of the rule, it was a really nice idea.
There were several great ideas that really stretched the "capabilities" of these rules - but the puzzle remained relatively approachable without being trivial at all.
Overall excellent puzzle, thanks for sharing!
on 19. June 2025, 10:59 by st4134
very cool nice puzzle!
on 18. June 2025, 08:48 by juggler
Lovely puzzle! Couldn't agree less with the previous commenter.
on 17. June 2025, 21:33 by JVA
ngl, the last deduction is kind of a d*** move, otherwise great puzzle
on 17. June 2025, 18:37 by kamkam
Why does r9c4 reveal r1c1? Hahaha ! wonderful puzzle
on 17. June 2025, 10:39 by SirRanch
I agree with fthompson. A tough but fair puzzle. The fog guides you beautifully through the logic. The 'constraint regions' rule is always so fun to solve. Thank you!!
on 17. June 2025, 02:01 by abihummel
Absolutely wonderful!
on 17. June 2025, 01:17 by wuc
Brilliant use of the dfog. Loved the box 147 interactions. Great setting thx.
on 17. June 2025, 00:21 by fthompson
Absolutely lovely puzzle. I'm usually a slow solver, but this flowed wonderfully for me, and I never felt stuck!
on 16. June 2025, 11:20 by LehanLehan
What a beautiful solve path, thank you very much for the puzzle.
on 15. June 2025, 19:53 by Jowser
One of the best puzzles I have ever solved! Fun from start to finish
on 15. June 2025, 19:47 by VitP
luckily, right from the beginning, i read ramesh's comment, so was not slowed by that.
really good puzzle
on 15. June 2025, 15:09 by Ragna
Fun puzzle! Thank you. :-)
on 15. June 2025, 13:47 by rameshsrivats
Great fun. Luckily, right from the beginning I guessed the implication of the rules and was waiting for the disambiguation :)
