Anna Zatonskih (left), the recently crowned 2009 U.S. Women’s Chess Champion, combines chess and roulette with Rex Sinquefield (right), president and chairman of the board of the Chess Club and Scholastic Center of Saint Louis Oct. 14 in the Mildred Lane Kemper Art Museum. This unique game — the ultimate mix of chance and strategy — was co-created by Jennifer Shahade (center), the 2002 and 2004 champion, as an homage to the artist Marcel Duchamp. A lifelong chess player, Duchamp often included chance elements in his work, which is featured in the exhibition “Chance Aesthetics,” on view at the museum through Jan. 4.