Dev here, just to let you know and stay tuned for the next week. Currently I am studying a way to use the UCI protocol to beef up AI with an external engine. 

Until now I was reluctant as it leaves a series of issues regarding platform specific code, but after a series of studies I think 'maybe' I can make it work in Godot. 

Hopefully that endgame victory screen will be a lot harder to achieve when I am done.