Readymades of Marcel Duchamp to turn up any identical matches to photographs of the originals. However, there are accounts of Walter Arensberg and Joseph Stella being with Duchamp when he purchased the original "Fountain" at J. L. Mott Iron Works. Such investigations are hampered by the fact that few of the original "readymades" survive, having been lost or destroyed. Those that still exist are predominantly reproductions authorized or designed by Duchamp in the final two decades of his life. Shearer also asserts that the artwork "L.H.O.O.Q." which is recorded to be a poster-copy of the "Mona Lisa" with a moustache drawn on it, is
Marcel Duchamp position that can arise in the endgame. Using enneagram-like charts that fold upon themselves, the authors demonstrated that in this position, the most Black can hope for is a draw. The theme of the "endgame" is important to an understanding of Duchamp's complex attitude toward his artistic career. Irish playwright Samuel Beckett was an associate of Duchamp, and used the theme as the narrative device for the 1957 play of the same name, "Endgame". In 1968, Duchamp played an artistically important chess match with avant-garde composer John Cage, at a concert entitled "Reunion". Music was produced by a series of