In a game of chess, the king can castle with the rook of the same color in order to get into a safer position. When the rook moves 2 squares, castling is written as 0-0. If the rook moves 3 squares, castling is written as 0-0-0. Now, look at the worksheet with your child. On the first chessboard, the king has moved two squares aside towards the rook. On the second one, the rook has jumped over the king to stand beside it. Let your child use their castling knowledge to answer some of the questions in this easy pdf.