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:
Lösungscode: 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.
am 10. August 2023, 20:43 Uhr von StephenR
Good one, thanks.
am 25. Februar 2023, 14:45 Uhr von 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!
am 22. Februar 2023, 04:14 Uhr von SimplePurpleFrog
After an easy start, the difficulty ramps up steeply and stays high pretty much to the end.
Interesting and clean logical path.
am 24. Dezember 2022, 12:59 Uhr von Vebby
Superb!
am 4. August 2022, 23:41 Uhr von 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
am 6. März 2022, 03:41 Uhr von mathpesto
Added Rangsk video
am 17. Februar 2022, 00:46 Uhr von 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!
am 10. Februar 2022, 14:27 Uhr von kolot
Absolutely wonderful puzzle! I loved it.
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@kolot Thanks so much!
am 10. Februar 2022, 06:32 Uhr von mathpesto
Added walkthrough of solution
am 9. Februar 2022, 19:43 Uhr von marcmees
a fantastic construction puzzle. thanks.
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@marcmees Great, thank you!
am 9. Februar 2022, 17:54 Uhr von 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.
am 9. Februar 2022, 17:01 Uhr von 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!
am 9. Februar 2022, 11:56 Uhr von 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!
am 9. Februar 2022, 08:42 Uhr von KNT
My head hurts