C major (1828; scored for two violins, viola and two violoncellos; first published as Op. posth. 163) D deest, String Sextet in an unknown key for three violins, viola, violoncello and double bass (date unknown, fragment; lost) Works for string quartet D 2C, Movement in D minor/F major for string quartet [formerly D 998] (1811?, fragment) D 3, Movement in C major for string quartet (1811 or 1812?, fragment; version for string quartet of D 29) D 8A, Overture in C minor for string quartet (after 1811, version for string quartet of D 8) , String Quartet No. 1, String Quartet in G minor/B major (1810 or 1811) D 19, String Quartet in (an) unknown key(s) (1810 or 1811, lost) D 19A, String Quartet in (an) unknown key(s) (1810 or 1811, lost) D 20, Overture in B major for string quartet (1812, lost) , String Quartet No. 2, String Quartet in C major (1812) , String Quartet No. 3, String Quartet in B major (1813) , String Quartet No. 4, String Quartet in C major (1813) , String Quartet No. 5, String Quartet in B major (1813, two "Allegro" movements are extant; middle movements are lost?) , String Quartet No. 6, String Quartet in D major (1813) D 86, Minuet in D major for string quartet (1813?) , String Quartet No. 10, String Quartet in E major (1813, first published as Op. posth. 125 No. 1) D 87A, Fragment of a vocal or instrumental movement in C major for string quartet (?) (1813, fragment; also appears as "Andante in C major") D 89, Five Minuets with Six Trios, Five German Dances with Seven Trios and One Coda for string quartet (1813, 2 versions of Minuet No. 3 and German Dance with Trio No. 5) D 90, Five German Dances with Seven Trios and One Coda for string quartet (1813, belong to D 89) , String Quartet No. 7, String Quartet in D major (1811 or 1812) , Quartettsatz (D 103), String Quartet in C minor, (1814, fragment of the first movement is extant) , String Quartet No. 8, String Quartet in B major (1814, first published as Op. posth. 168) , String Quartet No. 9, String Quartet in G minor (1815) , String Quartet No. 11, String Quartet in E major (1816, first published as Op. posth. 125 No. 2) , String Quartet No. 12, Quartettsatz (D 703) in C