Very interesting idea! I understand that doing a chess AI from scratch on your own during the jam would be pretty unreasonable, but I'd be eager to try a post-jam version. I wish there was a little more clarity about the rules in terms of what was determining when I could choose a new piece (a countdown timer of some sort on the UI would be great), especially since this is a game where I'd like to plan for that in advance and the timer is not always consistent and depends on what piece you chose last time.