Before you begin this worksheet, you must first take the time to find out how well your child understands castling in chess. If they have a clear knowledge of the rules surrounding castling, then you can go ahead with this exercise. However, if your child is still a little confused about the rules, take the time to explain it to them. Once they are clearer on the rules surrounding castling, help them complete this exercise. Here, you must check the board where both kings cannot castle.