Chaos Construction: 2nd Region X-Sums #2 (9x9)
(Published on 5. April 2022, 11:15 by Jesper)
Rules
1. Divide the grid into regions, each consisting of nine orthogonally connected cells.
2. Each row, column and region must contain the digits 1 to 9 once each.
3. For any clue outside the grid (number or question-mark):
- Let X be the first digit in the second region, seen from the direction of the clue
- Then that region occupies exactly X consecutive cells within the respective row or column, before the next boundary (or the end of the grid)
- Further, the outside clue corresponds to the sum of the digits in those X cells
4. A black diamond inside the grid denotes that the 4 digits surrounding it form a Renban group (i.e. they are non-repeating consecutive digits, in any order). All such black diamonds are given.
Example (6x6):
Penpa+: Example (6x6)
The puzzle follows:
Penpa+: Chaos Construction: 2nd Region X-Sums (9x9)
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Solution code: Row 1 followed by column 9
Comments
on 29. April 2024, 04:38 by tallcat
Coming to this puzzle very late as i have been trying to improve my CC solving skills. Brilliant construction from start to finish - and i love the black dot mechanic (especially the negative constraint)
on 14. September 2023, 01:49 by lerroyy
Really cool puzzle
on 16. August 2023, 06:13 by Agent
Masterful!
on 23. April 2023, 02:42 by konklone
I made it! This was great fun. The immediate break-in was manageable, but the initial phase after that was full of traps that I kept running into. Figuring out the possibility I was missing took a while but was very fulfilling to get through. Thank you for constructing this!
on 19. February 2023, 11:12 by PrimeWeasel
Tough 4/5 star break-in, with a very smooth path afterwards, which felt more like a 3 to me, 4 stars overall indeed. Pretty cool. Thanks Jesper
on 27. September 2022, 22:24 by ONeill
Such a great puzzle from the break-in to the very end. Thank you!
on 11. July 2022, 20:14 by Phistomefel
There was not a single trap I didn't stumble into. Bruised and with a mouse trap around my left big toe I finally crawled to the finish line. There was some really marvelous logic in there (which I wish I had seen before storming off in the wrong direction though).
on 7. July 2022, 17:50 by Christounet
Incredible construction ! Your chaos settings have a surgical precision in them, that make for wonderful journeys along very narrow pathways... Thanks for the entertainment.
on 8. April 2022, 20:09 by AnnaTh
Hat unglaublich viel Spaß gemacht! Danke, @Jesper für deine tollen Rätsel!
on 8. April 2022, 16:13 by Dandelo
Sehr schön!!
Ich musste es zum zweiten Mal lösen, weil ich es am ersten Tag auf dem Smartphone gelöst hatte und den Tab irgendwie vor der Codeeingabe reloaded habe. Aber selbst wenn man den Lösungsweg schon mal gefunden hatte, war es immer noch schwer...
on 8. April 2022, 16:03 by Lizzy01
Very nice!
on 7. April 2022, 21:26 by cornuto
Tolle Variante, vielen Dank dafür.
on 7. April 2022, 00:10 by KNT
Loved every bit of it- thanks!
on 6. April 2022, 20:54 by kolot
Wonderful puzzle! Not extremely hard and involves very beautiful deductions throughout the solution path. I especially loved the break-in. This puzzle was definitely much better than the first one for me.
on 6. April 2022, 14:43 by ___
the implications of some of the clue interactions which i did not initially understand were a big joy to finally discover. really fun and fantastic stuff, thanks Jesper!
on 5. April 2022, 22:39 by Piatato
Really a great puzzle! I found the solving path surprisingly — very pleasantly so — smooth.
on 5. April 2022, 22:35 by cmb
Beautiful puzzle.
sublime logic from start to finish.
a Masterpiece!
on 5. April 2022, 17:20 by Playmaker6174
Absolutely beautiful opening sequence, and then the later part as well! There're quite a lot of hidden traps here but luckily enough, I was conscious enough to ask the right questions. Magnificent work as always :)
on 5. April 2022, 15:04 by marcmees
magnifique. The solution path reads like a manual on how to lay a trap. thanks for all the fun.
on 5. April 2022, 12:01 by Vebby
Loved this one even more than the 8x8! :)
