The Sonata No. 9 from 1947 is Prokofiev’s last originally composed and completed piano work. It was premiered by the leading Soviet pianist Sviatoslav Richter. The four movements in a cyclical connection are only faintly reminiscent of the consistent characteristics of the three so-called War Sonatas Nos. 6–8. The character of this almost unknown sonata fluctuates between ‘balanced’ and ‘uniform’. The work is suitable for intermediate and advanced pianists.