extant) D 9, Fantasy in G minor for piano duet (1811) D 48, Fantasy in C minor for piano duet, Grande Sonate (1813, 2 versions) D 608, Rondo in D major for piano duet, Notre amitié est invariable (1818, 2 versions; 2nd version first published as Op. posth. 138) D 617, Sonata in B major for piano duet (1818, first published as Op. 30) D 624, Eight Variations on a French Song in E minor for piano duet (1818, first published as Op. 10; 2 versions of the "Theme" are extant) D 812, Sonata in C major for piano duet, Grand Duo (1824, first published as Op. posth. 140) D 813, Eight Variations on an original theme in A major for piano duet (1824, first published as Op. 35) D 818, Divertissement à la hongroise in G minor for piano duet (1824, first published as Op. 54) D 823, Divertissement sur des motifs originaux français in E minor for piano duet (pub. 1826–1827, first movement originally published as Marche Brillante, Op. 63; second and third movements first published as Andantino varié and Rondeau brillant, Op. 84 Nos. 1–2) D 908, Eight Variations on a theme from Hérold's Opera Marie for piano duet (1827, first published as Op. 82 No. 1) D 940, Fantasy in F minor for piano duet (1828, first published as Op. 103) D 947, Allegro in A minor for piano duet, Lebensstürme (1828, first published as Op. posth. 144) D 951, Rondo in A major for piano duet, Grand Rondeau (1828, first published as Op. 107) D 952, Fugue in E minor for organ duet or piano duet (1828, first published as Op. posth. 152) D 968, Allegro moderato in C major and Andante in A minor for piano duet, Sonatine (between 1815 and 1819?) D 968A, Introduction, Four Variations on an original theme and Finale in B major for piano duet [formerly D 603] (date unknown, first published as Op. posth. 82 No. 2) Marches and dances D 599, Four Polonaises for piano duet (1818, first published as Op. 75) D 602, Trois Marches Héroiques for piano duet (1818 or 1824, first published as Op. 27) D 618, German Dance in G major with Two Trios and Two Ländler in E major for piano duet (1818) D 618A, Polonaise in B major for piano duet (1818, sketch) D 733, Trois Marches Militaires for piano duet (1818?,