Normal sudoku rules apply.
Standard rules for ten lines (gray), renban (purple), nabner (gold), German whispers (green), region sum lines (blue), double arrows (line between purple circles) and black dots (black) apply. [See below for details.]
There are no negative constraints of any kind.
Ten Lines: Digits along gray lines must be broken into one or more contiguous groups of cells that add to ten. Such groups cannot overlap. Digits may repeat within such sums if allowed by other rules. For example, 513173 is a valid fill for a length 6 line, because it can be broken into 5131 and 73, each of which sum to 10.
Renban Lines: The purple line in the grid is a Renban line. Digits on a renban form a set of non-repeating, consecutive digits in any order.
Nabner Lines: Digits do not repeat along gold nabner lines. Additionally, no pair of digits anywhere on a nabner line can be consecutive.
German Whispers: Along green lines, adjacent digits must differ by at least 5.
Region Sum Lines: Blue lines in the grid are Region Sum Lines. The sum of digits on the line is the same within each box.
Double Arrows: The sum of the digits along a line connecting two circles is equal to the sum of the digits in the circles.
Black Dots: Digits separated by a black dot have a 1:2 ratio, meaning one is exactly double the other. Not all dots are necessarily given.
Have fun, leave a comment if you enjoy the puzzle!
PS: I stream solving sudoku like puzzles three days a week. You can check out the channel, as well as some videos I have made about setting puzzles, at my YouTube channel here.
Solution code: Row 1
on 27. August 2024, 21:26 by Nemefish
Achieves a nice constant but reasonable challenge. This zeta puzzle is like setting the treadmill at a light jog for 30 minutes. You are never gasping for air, but you are getting your exercise.
on 1. November 2023, 19:47 by Niverio
Amazing puzzle! Very nice interactions.
on 26. October 2023, 01:00 by mackerel
Beautiful puzzle! Probably not relevant for most but I would love for future puzzles like this to include a reference for colour-blindness - I spent a very long time thinking the gold and green lines were the other way around (the blue and purple were fine because of the rules referring to the single purple line). But once I got going I had a wonderful time with many delightful deductions, thank you!
on 25. October 2023, 18:50 by RebelSystem
One of those fun puzzles where I keep wondering how on earth it's ever going to work with seemingly so little useful information about any cell. Which means every step forward feels happy.
It's also the 100th puzzle I've solved here apart from a few I solved a long time ago without setting up an account. The 100th had to be a puzzle by someone I know and came to love through CtC!
on 25. October 2023, 13:24 by samuel1997
Nice, smooth and approachable! Excellent!
on 25. October 2023, 03:54 by wand
very smooth
on 25. October 2023, 03:37 by Calvinball
This might be the most zeta puzzle that zeta has ever zeta'd. In fact if one was searching for true enlightenment in the way of zeta, they could find it here.
on 24. October 2023, 23:28 by Myxo
Absolutely wonderful!
on 24. October 2023, 22:50 by giladooshlon
I battled this puzzle for an hour assuming the line with terminating circles is a between-line, and kept progressing until I reached a multi-solution dead end (https://ibb.co/WtR8NR7). Only after staring incredulously for several minutes did I re-read the rules and realize my mistake. Thankfully after back-tracking to the error I was able to complete the puzzle smoothly in a few minutes.
on 24. October 2023, 22:35 by Piatato
Smooth in such a fun way :)
on 24. October 2023, 19:28 by KNT
one of the more enjoyable lower-difficulty puzzles I've done in recent memory, thanks a lot for this!
on 24. October 2023, 19:25 by Playmaker6174
[What the heck is this flow...]
Anyway, another tasty salad bowl from you as usual, so many funny stuff happened throughout x)
Edit: comedic ID btw
on 24. October 2023, 18:55 by Xendari
great puzzle! fun flow throughout
on 24. October 2023, 18:47 by MicroStudy
zeta has truly mastered the art of weird but satisfying interactions across the grid