If your king and the rook on the side of the board you want to castle to haven't moved yet during the game AND If the king is not threatened (in check), or the squares the king passes through or lands on aren't threatened AND provided there's no pieces between the king and the rook you can perform castling by moving the king 2 squares towards the rook, and the rook on the square immediately to the opposing side of the king.
At chess.com the feature is done by taking the king and releasing it 2 squares on his either side. Like this: Grab the king and drop it over the c1 square
Hoq do i do castling while playing chess.Please explain...