ELI5: Explain Like I'm 5

Castling

Okay kiddo, so in chess there is a move called castling. It's a special move where you can move both your king and one of your rooks at the same time.

When you castle, you move your king two spaces towards the rook you want to move, and then you move that rook to the other side of the king.

Why do people castle? Well, it's a really good way to keep your king safe. By moving your king to the side of the board and behind some of your other pieces, you are protecting it from any attacks that might come from the other player's pieces.

It's also a good way to get your rook into a better position. Your rook can now move towards the center of the board where it can help control more squares and put pressure on your opponent.

You can only castle if certain conditions are met. The first is that neither your king nor the rook you want to move can have moved yet in the game. You also can't castle if your king is currently in check, or if any of the squares between your king and rook are being attacked by an opponent's piece.

But if all of those conditions are met, then you can play the castling move and feel like a chess master!