Yikes, compared to vanilla Yajilin, Regional Yajilin is way more annoying to construct. In particular, the black squares are strong enough that having slightly too many in a small space creates lots of impossible configurations. In any case, here's my take on this genre. This took a long time to set (especially since I kept making mistakes), and apart from the 1×2 rectangles in the corners, I'm happy with how this turned out.
