There are more possible games of chess than there are atoms in the observed universe, and the study of chess and chess tactics are just as deep and complex as that magnitude suggests!
Expect to see and learn how to solve questions like this one:
Rooks are considered the strongest piece on the board besides the Queen, and they can work in concert to provide long-range offense and defense to a large part of the board. Their ability to swap from protectors of the King after castling to attacks on the back rank in the very next move make learning their strategies and tactics vital. They are also often pivotal pieces in endgames, such as the one depicted above.
