Killer Construction
(Published on 12. June 2020, 21:33 by ahaupt)
In every row and column, each digit from 1 to 9 occurs exactly once. In addition, there are 9 continuous regions in which each digit from 1 to 9 occurs exactly once. These regions however are only given indirectly.
A number in the top left corner of a cell indicates the sum of the digits, that are seen from this cell looking to the north, south, east and west. The cell with the clue counts once in this sum. Cells outside of the same region block the visiblity.
Have fun solving! The puzzle is also available online at Penpa.
Inspiriered by Chaos Construction by Phistomefel
Solution code: 5th row, 5th column
Comments
on 14. January 2024, 23:11 by tallcat
Came to this one via KNT's recommendation - loved it!! Brilliant construction all around.
on 26. November 2023, 23:38 by Myxo
What an incredible construction!
on 28. October 2023, 04:32 by KNT
fantastic! for one of the first chaos constructions ever, it is amazing that it holds up so, so well.
on 3. February 2023, 04:44 by Agent
Very nice Chaos Construction! Many beautiful deductions throughout.
on 13. July 2022, 09:40 by niuniuch
For those who prefer to solve in the CtC app:
https://app.crackingthecryptic.com/sudoku/?puzzleid=fpuzzlesN4IgzglgXgpiBcBOANCA5gJwgEwQbT1AxjQgHsA7BADgF9kiTyr46GRjTKb7GuW2fZj3adhrXhybcJo6QMliZdALrJCU%2FiKHLF87ZvGDDuuVtk6FZo3vOr1lg0quOLJl%2B6f63zr3dQAbgCGADYArnDwAIyopAEwLAAuGBG2Nmoavj7exlm5OWmmrvl2hR55tBnFZX421kWe2aX15QUtPFWNJXXV7U09XTX9DRWdFX3dI229M7xzY9ODE0OTrc3AcwyVDkszu%2Fvjs1tbKmogAMZBaJEa5zAhIWD4IABKAKwAwgDMIGdkYYkQhAKDAPggQABiABiMNhIFQADNKIkwfBIQAGTFYkCSO4PJ7wPCvL4fN6%2FVD%2FQHA0Hg6GwmHwkBIigo2lY7G4%2B6PZ4vKIfKLkkDBcKREAAFjFjMpQJBqMh9IZiORcoh7MxOPYeO5hNefOoguFEXBYp%2BFIBMppaLp9MZzNZVrV6I1oC1BKJLxJkrOhtFACYyWaqbLaQqobblWy1c6Lly3cSPgA2A2hI1o31JwMWlWh8MslWO6Ounli77JkXgqK%2BqXm6nZhW5%2B0YqOc%2FHFj4AdjLqZAvv1mdrIfrSrzkfZhdjPITHa7fqr%2FeDVpzw8bqubmonOpe1H5M%2BNTvnlvlQ6ZEYda5dG%2Fd2%2F13pTorFAoPdZty%2Fz55jrc3iGnt%2FLaYzIDSgOi7Hnab5ji22ruu2pK7miAaATWC5Hi%2BJ4jmeEHrp%2B0Glr%2B3ZRKaiFBoe1pwq%2Bo4ciotBAA%3D%3D%3D
on 31. January 2022, 14:58 by Vebby
Incredible puzzle, going straight into my favourites. Thanks ahaupt!
PS: This puzzle should have the Chaos Construction tag instead of the Irregular tag.
on 17. May 2021, 17:56 by Mody
Wunderschön und genial konstruiert.
on 18. December 2020, 11:12 by ahaupt
Thanks everyone for your nice comments. And I'm very glad that you find my puzzles instructing, 97johny.
Thanks for solving them!
on 15. December 2020, 21:23 by 97johny
This is excellent puzzle! It's impressive how many little steps you managed to fit in on this set of rules, just to identify the regions. This is truly high level construction.
Also, ahaupt, I would like to thank you for the puzzles you posted here. I have recently played most of them and my undestanding of sudoku improved because of it. Not only they are interesting, but your usage of geometry can definitely work as a learning material too. So, once again - thank you.
on 30. November 2020, 08:14 by Yohann
Brilliant puzzle
on 29. November 2020, 21:29 by marcmees
extremely nice puzzle. thanks
on 20. July 2020, 08:33 by Statistica
Very nice entry. Great Puzzle!
on 19. July 2020, 13:49 by ibag
Wow, very nice!!!
on 22. June 2020, 02:19 by Eggr
Fantastic puzzle! It took me 2 hours but it was quite fun.
on 19. June 2020, 13:21 by ahaupt
@Jesper
Yes, I agree, because firstly it's an unusual concept and secondarily the beginning might be tricky to spot.
Thanks for playing it though!
on 18. June 2020, 23:16 by Jesper
Great puzzle! I think this is harder than most recent puzzles rated as 4 star difficulty. But ok, a hard 4 or an easy 5, I guess.
on 13. June 2020, 12:11 by ahaupt
@cdwg2000, @Joe Average
Great, glad you like it. Thanks so much for playing it.
on 13. June 2020, 11:47 by Joe Average
Great concept! I also think the difficulty is 4 stars.
on 13. June 2020, 03:41 by cdwg2000
Very Nice,difficulty is about 4 stars.
on 12. June 2020, 21:35 by ahaupt
I am not sure how difficult this puzzle is. Maybe 4 or 5. Please let me know if I should change the difficulty rating.
