Jack Lance on Twitter: "Guess what type of puzzle this is, and then solve it. https://t.co/FqHGFYlciQ (Note: black cell means shaded, dot means unshaded.)" / Twitter

Guess what type of puzzle this is, and then solve it. i.gyazo.com/d8db1499b76c25 (Note: black cell means shaded, dot means unshaded.)