Quem Dixere Chaos
(Published on 9. February 2022, 05:06 by mathpesto)
Here's my third chaos construction puzzle, and the first time I was able to successfully use negative constraints in one! If you're feeling stuck, check out the walkthrough of the solution below. Hope you enjoy it!
Rules:
Each row, column, and region must contain the digits 1–9 exactly once. Regions must be determined.
Digits inside of a cage must sum to the total, if given.
All instances of adjacent cells summing to 5 are marked with a "V" or "?". All instances of adjacent cells summing to 10 are marked with an "X" or "?". All instances of adjacent cells summing to 15 are marked with an "XV" or "?".
Adjacent cells summing to 5, 10, or 15 must be in separate regions. Adjacent cells within a cage must be in separate regions.
SPOILER ALERT Walkthrough of Solution
SPOILER ALERT Video of Rangsk's Solve
Puzzle:
Solution code: Type the 9 digits (no spaces) of the region containing R5C5 as follows: 1st row of region left to right, 2nd row of region left to right, etc.
Comments
on 10. August 2023, 20:43 by StephenR
Good one, thanks.
on 25. February 2023, 14:45 by Leira
I broke this a few times because I was tired, but I managed to get through it in the end. Such a beautiful puzzle!
on 22. February 2023, 04:14 by SimplePurpleFrog
After an easy start, the difficulty ramps up steeply and stays high pretty much to the end.
Interesting and clean logical path.
on 24. December 2022, 12:59 by Vebby
Superb!
on 4. August 2022, 23:41 by lerroyy
Very nice puzzle, a different solve path than most CC's, really enjoyed it and it was a smooth solve. thanks
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Thanks, lerroyy! -Math Pesto
on 6. March 2022, 03:41 by mathpesto
Added Rangsk video
on 17. February 2022, 00:46 by matiasv5
I came here after solving the Suguru puzzles. You have a new fan, my friend! :)
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@matiasv5: Woohoo! Glad to hear it!
on 10. February 2022, 14:27 by kolot
Absolutely wonderful puzzle! I loved it.
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@kolot Thanks so much!
on 10. February 2022, 06:32 by mathpesto
Added walkthrough of solution
on 9. February 2022, 19:43 by marcmees
a fantastic construction puzzle. thanks.
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@marcmees Great, thank you!
on 9. February 2022, 17:54 by clohrmann
Absolutely loved this puzzle! I agree with the others who said that the negative constraints were useful, but not unreasonable to find. Thanks so much for making this.
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@clohrmann Thanks! I went through many iterations of this puzzle until I felt like the negative constraints were manageable, so I'm glad to see solvers are finding that to be the case.
on 9. February 2022, 17:01 by Krokant
This is great! I really love the negative constraints. Solving was fun from start to finish. :)
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@Krokant So glad to hear that!
on 9. February 2022, 11:56 by twobear
Very nice and beautiful puzzle! It resolves smoothly once certain symmetries are established. Also, there is no unreasonable screening for the negative constraints. Great puzzle, thank you!
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@twobear Thank you so much!
on 9. February 2022, 08:42 by KNT
My head hurts
