I am new to this game and try to learn to be better, I registered to this website to learn more how to play chess. The reason I bought this Square board was to play with my grandchild who lives quite a way from me. I still am not able to play with the board using Chess.com or Lichess, I do not know how to do this even after I made the link between those two website and the Square board. Maybe you could enlighten me on how to do this.
Thank you for this link and the advice on how to flatten the board. I had already did what you suggested and placed weight on the board, but it did not resolve the problem of the air bubbles.