Checkers are complicated

I had a pause in progress because of Spring Break and then Relay business, but I've recently been working on making Checkers and it's way more complicated than I had antipicated. I got a 2-player game going fairly easily (below) but I've been having the hardest time trying to figure out how to validate moves, which is important because I need that to create the gametree nodes.

On the motions side, Corey was nice enough to give me some sword motions she's captured, so I'm looking at those and seeing if they will fit.