Yes, the AI need a lot (A LOT) more work, right now is limited for 3 main reasons:
1) time (obviously)
2) It was way more difficult that anticipated for my skill level and
3) I need to bugfix a lot, if the IA is too strong I cannot reach the endgame :D
Thanks for the feedbacks, if you want to come back after the jam ends I am halfway for a version with a more refined AI. different board styles and international chess notation.