Looks very interesting. Somewhat related: I've recently wrote a code-walkthrough (in Clojure) of modeling chess-like games. https://neuroning.com/boardgames-

Looks very interesting. Somewhat related: I've recently wrote a code-walkthrough (in Clojure) of modeling chess-like games. https://neuroning.com/boardgames-exercise/ https://neuroning.com/boardgames-exercise/ It's very basic and intended for teaching/learning functional programming, not a real library or engine like the OP.