This is a nice app, but I have one bug report: When I tap on a piece, and it can capture another piece, it looks like it just can't move that way. Capturable pieces should have their background change somehow, to indicate that I can capture them.

Yeah, that’s more me being lazy than an actual bug. I left it like that assuming most people would figure it out anyway — but you’re right, it’s bad design. I’ll add a border around the "capturable" pieces.

Thanks, it left me a bit baffled the first time, as it seemed to say I can't capture the piece, when I knew I could. I tried anyway, and it worked, but it was confusing.

That’s more of a feature request not a bug report