Nikoli Slitherlink + Masyu hybrid; I don’t know who first put them together but combinations like this aren’t rare.
Draw a loop through vertices that cannot intersect itself; each number indicates how many of the four edges around it are drawn; the loop must pass through all large dots, and it must go straight through white dots while turning either before or after (or both), while it must turn on black dots without turning either before or after.
Nothing special but at least it’s neatly symmetric.
Apparently all I have to do is talk about stuff that happens recently and I can get a surge of accidental visitors from Googling.