Fischer v. Spassky, WC Match, 1972, 6th match game (if memory serves, it was #6). Fischer for the first time played the Queen's Gambit in a serious game. And what a beautiful game! Every move had that quality of Fischer at his best: "simple and good." I remember playing over that game and saying, "My God, I understand this! I could play like this!" But of course I couldn't. But Fischer's play had that marvelous simplicity about it that draws you right into his games.
There was a standing ovation from the audience when this one ended - and Spassky joined in!
Title says it all!