Japanese Aquarium
(Published on 3. January 2023, 23:06 by Jay Dyer)
Rules
- Divide the grid into nine regions, each containing nine orthogonally connected cells. Place digits from 1-9 into each cell so that no digit repeats in any row, column, or region.
- Shade some cells such that, in each region, cells in a given row are either all shaded or all unshaded, and unshaded cells are never below shaded cells in the same region.
- Clues outside the grid give the sums of the digits in each connected set of shaded cells in that row/column, in order. If there are multiple clues in a row/column, the shaded sets must be separated by at least one unshaded cell. In each row/column, either all clues or no clues are given.
Solution code: Rows 2 and 3.
Comments
on 22. November 2023, 16:46 by Snookerfan
Fantastic puzzle! Really hard when you don't have much experience with aquarium puzzles. But learning the implications of the ruleset was a joy. Thank you
on 27. October 2023, 19:30 by Dot
Brilliant! It took me several attempts and also several hours or more, but it was a real pleasure!
on 19. January 2023, 13:40 by MagnusJosefsson
Wonderful puzzle! Challenging yet with a really well designed and smooth path.
on 16. January 2023, 06:44 by Gnosis66
I wish that I had this definition of aquarium rules when I was first introduced to them. Very precise.
on 15. January 2023, 04:53 by Agent
Really cool puzzle!
on 13. January 2023, 21:54 by 0123coolkid
This puzzle introduced me to aquarium puzzles! I had to solve a couple plain aquarium puzzles in order to get used to the logic. But this was a masterpiece!! It's absolutely insane how people set these kinds of puzzles.
on 11. January 2023, 05:25 by alwaysbcoding
incredible puzzle. was always challenging to find the next step, but never felt unfair or too hard to make progress. took me 2+ hours, and I loved every second of it
on 10. January 2023, 01:15 by BHUNTER47
Amazing puzzle. Took me a while to realize one single region line that I had assumed to be in existence didn't have to be there which tripped me up! All the clues were beautiful.
on 9. January 2023, 04:41 by soroush
I really love aquarium puzzles and I'm really happy to see this one. Excellent stuff.
on 7. January 2023, 18:44 by Elliptical
Jay Dyer does it again. A brilliant and original idea perfectly executed.
on 6. January 2023, 22:22 by bansalsaab
Beautiful puzzle. Every clue mattered! One of those rare days for me when smallest deduction I made seemed Simon like and it just flowed to wonderful solution.
on 6. January 2023, 07:03 by RJBlarmo
Nice puzzle combination, pretty tricky imo!
on 4. January 2023, 06:21 by KNT
Challenging and fun CC, thanks
penpa+ and sudokupad links for people who dont like to tilt their head 45 degrees when solving:
https://tinyurl.com/2eygjdz5
https://tinyurl.com/3trdfkzz
on 4. January 2023, 00:36 by ONeill
Great puzzle!
