Piano Sonata no. 4 in C minor, op. 29

Sergei Prokofiev's Piano Sonata No. 4 in C minor, Op. 29, subtitled D’après des vieux cahiers, or After Old Notebooks, was composed in 1917 and premiered on April 17 the next year by the composer himself in Petrograd. The work was dedicated to Prokofiev's late friend Maximilian Schmidthof, whose suicide in 1913 had shocked and saddened the composer.