Piano Sonatas no. 1 in D minor / no. 2 in B-flat minor

Piano Sonatas No. 1 in D minor and No. 2 in B-flat minor are piano sonatas by Russian composer Sergei Rachmaninoff, composed in 1908 and 1913 respectively (the No. 2 was revised in 1931). Both works employ late-Romantic harmonic language, expansive forms and virtuosic piano writing, and they occupy a transitional place in Rachmaninoff's output as he moved from his earlier large-scale romantic tendencies toward a more concentrated later style.