Einstein versus Oppenheimer is a game of chess said to have been played between theoretical physicists Albert Einstein and J. Robert Oppenheimer at Princeton University in 1933. In the game, Einstein plays the white pieces, and uses the Ruy Lopez opening; Oppenheimer, as black, responds with the Morphy Defense (3...a6). Einstein wins the game after 24 moves. There is no conclusive evidence that Albert Einstein and J. Robert Oppenheimer ever played chess together.