By The Way, Which One's Pink? 2
(Published on 10. July 2026, 02:08 by juddimal)
Normal sudoku rules apply.
All lines are REGION SUM LINES (blue): box borders separate blue lines into segments with the same sum.
Each line also has one additional constraint.
- Box 1 has a MODULAR (teal) line: any sequence of three digits along the line must contain a digit from {1,4,7}, one from {2,5,8}, and one from {3,6,9}.
- One line is ENTROPIC (orange): any sequence of three digits along the line must contain a digit from {1,2,3}, one from {4,5,6}, and one from {7,8,9}.
- One line is PARITY (red): adjacent digits along the line alternate even/odd.
- One line is PALINDROME (gray): digits on the line read the same in both directions.
- One line is GERMAN WHISPER (green): adjacent digits along the line must differ by 5 or more.
- And finally, one line is RENBAN (pink): digits along the line must be a non-repeating set of consecutive digits, in any order.
It is up the solver to determine which constraints go on each line. Color the remaining five lines {orange, red, gray, green, pink}. All lines are region sum and each additional constraint is used once.
https://sudokupad.app/yphfw367a2
Solution code: Column 1 (9 digits)
Comments
today, 18:57 by amirs
Great puzzle! I loved the fact that it still required a lot of thinking even after figuring out which line was which.
on 10. July 2026, 21:38 by Exigus
Superb stuff, thanks!
on 10. July 2026, 12:19 by Arheus
Very nice construction! It's the kind of puzzle where, if you know how to ask the right questions, it just unfolds and solves very smoothly. I would also say 3.5*, probably closer to 3* for me.
on 10. July 2026, 11:08 by PierreTombal
Lovely break-in, 4* difficulty for that. No real surprises after that, smooth sailing towards the end.
on 10. July 2026, 10:48 by lmdemasi
Very nice construction. Felt like a 3-3.5* rather than 5* to me.
on 10. July 2026, 09:44 by Snookerfan
Brilliant puzzle! Interesting to discover which line has which constraint, which was not that hard. After that some great interactions that made the gorgeous break-in, smooth sailing after that. 3 to 4 stars in my opinion. Thanks
