> The game was first published in Freude am Schach (The Pleasure of Chess) by Gerhard Henschel in 1959.
That book used the conditional tense, to convey uncertainty about the game’s authenticity (‘la partie suivante qui aurait été gagnée par Einstein contre le grand physicien Robert Oppenheimer’)
source: https://www.chesshistory.com/winter/winter04.html item: 3533