This is cool!

One suggestion: some way to tell what the enemy pieces are? Maybe a legend to the right of the board? I ended up discovering by trial and error.

I think it makes a pretty good assumption on understanding core chess rules, but yea that would be nice. The thing that did trip me up at first was not realizing the red and blue bishops were the same piece, I was wondering if I was missing something.

Isn't it pretty obvious? At least I recognized them.