## Aquatic Construction (9x9)

(Eingestellt am 23. Juni 2022, 01:08 Uhr von KNT)

Some of you may have seen (or solved) the teaser I posted for this puzzle a couple days ago. This is easily my longest set to date, and while I am very self aware of the extreme difficulty, I do hope some of the brave among you give this a try. I am not one to gatekeep the solution paths to my puzzles, so if you get stuck, or even aren't sure of how to start, leave a hidden comment and I will try to respond with a hint as soon as I can. Be warned though, this is a war- not a battle. Attempt this when you have plenty of time.

Rules:

• Normal chaos construction rules apply.
• The final irregular grid will satisfy standard aquarium rules with respect to the outside clues.
• If a clued cell is air, then the digit in the cell indicates the number of water cells seen in the directions of the arrows combined. Likewise, if a clued cell is water, then the digit in the cell indicates the number of air cells seen in the directions of the arrows combined.
Clarifications and Definitions:

• A Chaos Construction is an irregular sudoku in which the regions are to be determined by the solver. All regions are orthogonally connected.
• Aquarium is a pencil puzzle type in which a grid is entirely tessellated into polyominoes. Every cell in the grid is either air or water.
• In an aquarium, if a cell in any polyomino is water, then every cell in the same and lower rows of the polyomino must also be water. Outside clues indicate the total number of water cells in the respective row or column of the grid.
Below is the 7x7 teaser and its solution grid to demonstrate the ruleset. In this example, a blue cell represents water and a yellow cell represents air. You can play it here.

And here is the main puzzle, which can be played on
Penpa+. Answer check is enabled with blue digits and green edges. Good luck!

My advice for solving this puzzle is to use coloring to keep track of air and water cells, and use the line tool in Penpa to keep track of what cells must be part of the same region. In my experience, it is the best way to save headache. In this ruleset it is also exceptionally easy to make mistakes, so be sure to double and triple check any difficult deductions you may come across.

Lösungscode: The air cells in the bottom 4 rows, left to right, top to bottom.

Gelöst von RJBlarmo, Steven R, Jesper, PixelPlucker, polar, MagnusJosefsson, Vebby, Isa, blazedy, the_cogito, Xenonetix, Elliptical, jkuo7, marcmees, ancarro, Niverio, henrypijames, noname1477, Statistica, harrison, tinounou, lerroyy
Komplette Liste

### Kommentare

Gestern, 19:32 Uhr von lerroyy
Very hard puzzle, but very nice!
Thanks KNT!

Gestern, 13:25 Uhr von Statistica
Ganz großartig. Hat eine Menge Spaß gemacht.

am 24. Juni 2022, 22:05 Uhr von henrypijames
I'm glad I was undeterred by the difficulty warning and did this puzzle cold - without the 7×7 warm-up. It was more fun this way, and only 4½ difficulty for me regardless.

am 24. Juni 2022, 20:55 Uhr von Niverio
Brutal, and I was 13 minutes too slow... RIP.

am 24. Juni 2022, 12:18 Uhr von marcmees
great challenge. Fulfilled my expectations completely. thanks.

Zuletzt geändert am 24. Juni 2022, 06:51 Uhr

am 24. Juni 2022, 02:03 Uhr von Elliptical
Excellent puzzle. A solid 5 star for difficulty. Every little deduction required some effort. The irregular sudoku at the end of the solution was also challenging. One of your best puzzles, in my opinion. I'm looking forward to Simon's video :)

Zuletzt geändert am 23. Juni 2022, 23:49 Uhr

am 23. Juni 2022, 21:47 Uhr von blazedy
:)

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(:

Zuletzt geändert am 23. Juni 2022, 23:49 Uhr

am 23. Juni 2022, 17:01 Uhr von Isa
beautiful puzzle really enjoyed solving it :)

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Thanks Isa!

Zuletzt geändert am 23. Juni 2022, 23:49 Uhr

am 23. Juni 2022, 16:56 Uhr von Vebby
Consistently challenging with interesting and enjoyable deductions throughout. Very nice exploration of the rule-set. Thanks KNT! :)

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Thanks Vebby! I tried my best to make sure the puzzle utilized the ruleset in every way it could, with a variety of deductions included in the solving path.

Zuletzt geändert am 23. Juni 2022, 23:48 Uhr

am 23. Juni 2022, 16:09 Uhr von MagnusJosefsson
Great puzzle, very consistently challenging and enjoyable!

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I'm glad you enjoyed it, Magnus!

Zuletzt geändert am 23. Juni 2022, 23:48 Uhr

am 23. Juni 2022, 13:18 Uhr von polar
Wonderful - thanks!

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Thank you polar, I'm glad this was able to scratch an itch for a solver like you that goes through dozens of puzzles a week :)

Zuletzt geändert am 23. Juni 2022, 23:47 Uhr

am 23. Juni 2022, 11:29 Uhr von PixelPlucker
Wow, that was a proper challenge. Loads of beautiful logic, thanks!

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Thanks for the solve PixelPlucker! I know we talked about this puzzle already a bit- but I seriously had a lot of fun setting it, despite the very long time it took. Glad you enjoyed it too!

Zuletzt geändert am 23. Juni 2022, 23:46 Uhr

am 23. Juni 2022, 11:21 Uhr von Jesper
Great puzzle, remains challenging until the end. Thanks!

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Thank you Jesper! I am glad you found it consistently challenging to the end.

Zuletzt geändert am 23. Juni 2022, 23:46 Uhr

am 23. Juni 2022, 10:58 Uhr von Steven R
Ow, my brain! This puzzle doesn't give anything up easily. Thanks KNT!

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Hah! That reaction is *exactly* what I was going for. Thanks for the solve, Steven!

Zuletzt geändert am 23. Juni 2022, 08:24 Uhr

am 23. Juni 2022, 08:05 Uhr von RJBlarmo
Really fun challenge! Very easy to make a mistake on this and I had to restart a few times. Extremely satisfying when everything finally falls into place at the end.

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Congratulations on the solve! I'm glad you persevered even after having to restart the puzzle several times.

 Schwierigkeit: Bewertung: 100 % Gelöst: 22 mal Beobachtet: 4 mal ID: 000AAR

Lösungscode: