Kazu Shagasi Puzzle
Naoki Inaba is an amazing puzzle maker, inventing whole new types of puzzles with regularity, and often with math connections.
Sarah Carter shared this new-to-me type. Something very fun about them, which often leads to me wanting to try to generate them in GeoGebra. Sarah's post about using these in class. This new type involves finding a subsquare with a specified number of objects in them, and then several variations on that. In this implementation, they aren't nearly as clever, as there may be multiple solutions. But you could think of it as a new wrinkle if you were generous.
In the twitter thread about it Karen Campe shared this TES page of English translations of many Inaba puzzles.