The overall UI you provided is really solid! Lots of settings and things to play with. You sectioned them rather nicely.
If you want to make it even easier for a single player to learn, you can even implement a tutorial that shows how a pawn can be captured. I know there are tons of visual learners and a little indicator may help them comprehend the project furthermore :)
Overall, the project is really well done, and I commend you for your brilliant efforts!