Marcel Duchamp the Broken Arm", followed soon after. His "Fountain", a urinal signed with the pseudonym "R. Mutt", shocked the art world in 1917. "Fountain" was selected in 2004 as "the most influential artwork of the 20th century" by 500 renowned artists and historians. In 1919, Duchamp made a parody of the "Mona Lisa" by adorning a cheap reproduction of the painting with a mustache and goatee. To this he added the inscription "L.H.O.O.Q.", a phonetic game which, when read out loud in French quickly sounds like ""Elle a chaud au cul"". This can be translated as "She has a hot ass,"
Marcel Duchamp much purer than art in its social position." On another occasion, Duchamp elaborated, "The chess pieces are the block alphabet which shapes thoughts; and these thoughts, although making a visual design on the chess-board, express their beauty abstractly, like a poem. ... I have come to the personal conclusion that while all artists are not chess players, all chess players are artists." In 1932, Duchamp teamed with chess theorist Vitaly Halberstadt to publish "L'opposition et cases conjuguées sont réconciliées" (Opposition and Sister Squares are Reconciled), known as corresponding squares. This treatise describes the Lasker-Reichhelm position, an extremely rare type of