Hah, I just wrote a similar question. It seems like it's simply an application of a search technique where the constraints are an NxN matrix. It's a good trick

Hah, I just wrote a similar question. It seems like it's simply an application of a search technique where the constraints are an NxN matrix. It's a good trick, to be sure, but it doesn't seem "quantum". I suppose you could argue that there are often many valid solutions to the system, and you're just selecting a superposition.