How to get the achievement "3D Glasses" ?

How to get the achievement "3D Glasses" ?

Easily! Go to: https://www.chess.com/settings/board (Settings->Board and Pieces) And choose any 3D option in "Pieces Style". Congratulations! The achievement is already in your collection!

P.S.: If an error occurs, repeat the steps with another device (on a laptop, smartphone app or smartphone browser).