L.H.O.O.Q. and wrote "Moustache par Picabia / barbiche par Marcel Duchamp / avril 1942". As was the case with a number of his readymades, Duchamp made multiple versions of "L.H.O.O.Q." of differing sizes and in different media throughout his career, one of which, an unmodified black and white reproduction of the "Mona Lisa" mounted on card, is called "L.H.O.O.Q. Shaved". The masculinized female introduces the theme of gender reversal, which was popular with Duchamp, who adopted his own female pseudonym, Rrose Sélavy, pronounced "Eros, c'est la vie" ("Eros, that's life"). Primary responses to "L.H.O.O.Q." interpreted its meaning as being an attack
Marcel Duchamp photoelectric cells underneath the chessboard, triggered sporadically by normal game play. On choosing a career in chess, Duchamp said, "If Bobby Fischer came to me for advice, I certainly would not discourage him—as if anyone could—but I would try to make it positively clear that he will never have any money from chess, live a monk-like existence and know more rejection than any artist ever has, struggling to be known and accepted." Duchamp left a legacy to chess in the form of an enigmatic endgame problem he composed in 1943. The problem was included in the announcement for Julian Levi's