Author: 红葉 (MOMIJI), from China, this question comes from his personal blog.
Draw a single continuous loop by connecting neighboring dots along the dotted lines. The numbers indicate how many edges of a cell are used for the loop. The loop may not touch or cross itself, and it doesn't need to touch all of the dots.
See
Nikoli linkfor an example.
Solution code: For each row the longest run of cells inside the loop.
on 22. October 2021, 13:40 by uvo_mod
Anfänger-Label entfernt.
on 13. June 2021, 03:00 by cdwg2000
If you need to use Penpa's auxiliary line segments, please select "Sub-Help(x)" and switch between "Normal" and "Help(x)".
on 13. June 2021, 01:44 by cdwg2000
I added a complete problem-solving process in the hidden comment area. If you encounter logic difficulties in the process of solving the problem, you can leave a message in the hidden comment area.
In a word: if you can't find the correct logic of problem-solving, you may not be able to successfully solve the problem through a lot of T&E.