This is genius!
As a former chess-enthusiast, i love the storytelling and the puzzles, and the visuals are super smooth! Having one-time abilities of other pieces works super well (i was wondering if it was only going to be king moves, but this really gives it a lot of depth).
Would love to see a full version of this with more (and more challenging) puzzles, maybe also playing other pieces at some point (you could make a whole story on this theme).
Are you planning on fleshing it out after the jam?