In her own words...
[O]ne evening (January 5th, 1945), in The Julien Levy Gallery a small invited public watched seven chessboards manned by seven intrepid players: Julien himself; Frederick Kiesler, avant garde architect and dreamer; Alfred Barr, the director of The Museum of Modern Art; Xanti Schawinsky, chess whiz; Vittorio Rieti, composer dear to Balanchine; Max Ernst and me, Dorothea, all of us braced to take on blindfolded chess-master George Koltanowski. Marcel Duchamp called out the moves. (For the record: everyone lost except Kiesler who managed a draw.)
—from Between Lives: An Artist and Her World. New York: W.W. Norton & Company, 2001, pp. 91-92.