Using a strong center to launch a kingside attack
Controlling the center is a key opening principle, but it has advantages in the middlegame and endgame, too. In this famous game, both sides complete all four of the openin goals (control center; castle; connect rooks; aim rooks). Therefore it is very difficult for the sides to carry out actions, and determining the correct strategy is difficult for both sides. Both sides play clever moves, but in the end it is White's control of the center that enables the kingside attack to succeed. I think this is one of the most instructive games for chess strategy.