Erica 40 (Dual Modular Edition)
(Published on 15. March 2026, 15:22 by SennyK)
Erica keeps on exploring the interactions between German whisper lines and modular lines, testers' estimated difficulty 2.5* :-)
I hope you will enjoy and I would be really grateful for all the comments and ratings.
Normal sudoku rules apply.
Every line is dual German whisper and modular line.
German whisper: Adjacent digits along a green line have a difference of at least 5.
Modular: Any sequence of 3 adjacent digits along a teal line must contain a complete set of residuals modulo 3, i.e: one from (1,4,7), one from (2,5,8) and one from (3,6,9).
X/V: Digits in cells joined by an X sum to 10. Digits in cells joined by a V sum to 5. Not all Xs and Vs are necessarily given.
Modular Line Explanation:
Basically, if one digit on the line is from one of the groups of residuals modulo 3, then every third digit will also be from the same group; same applies for the remaining groups.
If you liked this puzzle, I recommend trying out my other puzzles :-)Solution code: Sixth (6th) row of the grid from left to right.
Comments
on 1. April 2026, 00:32 by FullHouse07
That was a nice and easy puzzle, thank you !
on 18. March 2026, 08:45 by damo_89
Very interesting combination, the break in is fairly simple once you figure out which line to focus on.
on 17. March 2026, 17:19 by CitrusGremlin
Probably my favorite of the series so far. I do love modular lines. Pass on the compliments to Erica!
on 16. March 2026, 11:17 by VitP
looks intractable at first, until you realize that the long lines are VERY constrained, and that GEOMETRY isn't needed. then add a couple of Vs, and the rest of the solve is basic sudoku
on 16. March 2026, 01:46 by MarthaB
Fantastic puzzle! Thank you.
on 15. March 2026, 17:00 by wuc
To me this was: no clue where to break in. Learn about new rules when breaking in after lots of thinking. The later beeing able to use the aquired knowledge. I love these kind of solves. Brilliant setting thx.
