When To Trade Pieces 2: To Simplify! Amanda Mateer Feb 25, 2015 2232 views 8 min It’s one of the most important questions in chess: when do you trade pieces? Coach Amanda lets you know when it’s a good idea to exchange your pieces, and when it’s not. In this video, learn how to trade pieces to simplify the position and press your advantage. Remember to take our ChessKid lesson on square counting in the related links.