Really like this. I had considered making something similar but I wasn't sure on the best approach. I think it might be nice to add an option for the user to toggle how detailed each response is. I think for a lot of moves, you just want concise, simple feedback. But for other moves, especially mistakes, it is nice to press for more details.
Edit: What I had in mind was to actually develop something that would analyse all of my games and pinpoint some common mistakes that I always make (with the main focus on recent games). I feel that could be a really helpful tool to have.
