Castling! FM FunMasterMike Mar 25, 2015 1601 views 9 min Have you ever moved two of your chess pieces — on the same move? FM Mike Klein explains the special move called castling, where you are allowed to tuck your king safely away toward the corner. How do you castle? When are you allowed to do it? When are you definitely not allowed to castle? FM Mike Klein has all the answers in this important video.