This puzzle was created by Jakhob and wooferzfg.
In each of the 4x4 grids, place exactly 4 of the digits from 1 to 9, such that digits do not repeat in the 2x2 regions. Digits may not repeat in a row or column of the full 8x8 grid.
Each purple line contains a set of consecutive and non-repeating digits, in any order.
Digits on arrows must sum to the digit in the circle.
Neighboring digits on a green line must differ by at least 5.In cages, digits must sum to the number in the top left corner of the cage. Digits cannot repeat within a cage.
Solution code: Row 1 followed by Row 8
on 20. June 2024, 22:45 by SirMoose
I have made a few puzzles with the same basic ruleset recently and someone shared this with me. I really enjoyed it!
on 19. April 2023, 00:36 by talldrinkofwater
Such a fun puzzle! Took me a minute to understand the rules but really loved the logic once I did!
on 9. March 2023, 06:47 by Nordy
Wow, that was a super cool break-in and silky smooth follow up. Loved it
on 6. November 2022, 10:15 by kenferguson
Loved the way the four by four grids influenced but didn't dominate each other.
on 23. September 2022, 09:20 by Christounet
Very entertaining puzzle ! The interaction between the 4x4 is very cleverly designed.
on 22. September 2022, 18:12 by mathpesto
A beautiful, fun puzzle :) Would love to see more like this!
on 22. September 2022, 15:40 by Klausku
Very nice. Thanks!
on 22. September 2022, 10:53 by Playmaker6174
That was lots of fun, and it was really satisfying to see how each grid unfolds itself. Great job achieving this rating :)
on 21. September 2022, 22:12 by antiknight
A really nice puzzle with beautiful ideas.
on 20. September 2022, 03:23 by KNT
very cute puzzle
on 19. September 2022, 21:20 by Florian Wortmann
Straight to my favourites :-)
on 19. September 2022, 18:49 by Phistomefel
This was a fun puzzle. Thanks, you two! :)
on 19. September 2022, 11:06 by Agent
Cool puzzle! The logic was tighter and a lot more elegant than I expected.
on 19. September 2022, 10:06 by tsc
Astonishing puzzle, from the break-in to the finish. Thanks for setting and sharing this gem!
I might have missed an easier deduction, but there was at least one step in the middle which I found clearly harder than a 2.
on 19. September 2022, 10:01 by Prince Joffrey
Maybe my brain is on vacation too, but I found that harder than 2*. Very nice logic though. Thanks for the puzzle.
on 19. September 2022, 04:41 by thoughtbyte
This is a beautiful, approachable gem of a puzzle. Thank you!
on 17. September 2022, 22:16 by mattnburris
Totally agree - it was such a fun puzzle. It was a different way of thinking, but not too hard, nor too easy. I wish there were more puzzles that were easy but innovative and creative. Well done.
on 17. September 2022, 20:53 by wisty
This was such a fun puzzle! The logic made me smile a lot! The 4x4s interacting with each other was very satisfying and I enjoyed coloring them all first as much as I could before focusing on digits!