Busoni's performing commitments somewhat stifled his creative capacity during this period: in 1896 he wrote "I have great success as a pianist, the composer I conceal for the present." His monumental Piano Concerto (whose five movements last over an hour and include an offstage male chorus) was written between 1901 and 1904. In 1904 and 1905, the composer wrote his "Turandot Suite" as incidental music for Carlo Gozzi's play of the same name. A major project undertaken at this time was the opera "Die Brautwahl", based on a tale by E. T. A. Hoffmann, first performed (to a lukewarm reception) in Berlin in 1912. Busoni also began to produce solo piano works that clearly revealed a more mature style, including the "Elegies" (BV 249; 1907), the suite "An die Jugend" (BV 252; 1909) and the first two piano sonatinas, BV 257 (1910) and BV 259 (1912).