Fugue for String Trio in G (K. Anh.H 12,10)
von Wolfgang Amadeus Mozart
Mozart’s Fugue for String Trio in G (K. Anh.H 12,10) is a short contrapuntal movement associated with Vienna in 1782, when the composer was 26. Surviving sources point to an incomplete Mozart original later “filled out” by Maximilian Stadler, leaving its exact scope and authorship in performance partly composite.
Background and Context
The Fugue for String Trio in G (K. Anh.H 12,10) is usually dated to Vienna, 1782—Mozart’s first full year as a freelance composer in the city, freshly married to Constanze and navigating a crowded musical marketplace through teaching, subscription concerts, and rapid composition [1]. In that same period, Mozart’s private study of older counterpoint (especially Bach and Handel) began to show more plainly in works intended for learned, domestic music-making rather than public display.
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What can be said with confidence is modest but telling: the piece survives as a 37-measure fragment attributed to Mozart, with the continuation (to a much longer span) supplied by Maximilian Stadler—a contemporary musician closely connected with Mozart’s circle and a known “completer” of unfinished Mozart materials [2]. Modern cataloging places the work among Mozart’s fragments and completions, reflecting a transmission history in which the Mozart nucleus and later editorial/creative work are difficult to separate in the version typically played today [1].
Musical Character
Scored for string trio—violin, viola, and cello—the work is a single fugue in G major [2]. On the page, it presents the essentials of fugal craft: a subject stated in one voice and answered in others, with the three instruments taking turns as melodic protagonists while also providing contrapuntal support.
Even in so compact a medium, the trio texture invites a particularly transparent kind of counterpoint. The violin’s upper line can project the subject with brightness, the viola often supplies the crucial inner-voice logic that makes imitation convincing, and the cello anchors the structure while participating as an equal thematic partner. Heard this way, the fugue sits naturally beside Mozart’s broader Viennese turn toward “learned” writing: not academic for its own sake, but a way of sharpening dramatic tension and harmonic direction through imitation and close-knit voice-leading.
[1] Digital Mozart Edition (Mozarteum): NMA table of contents listing the fragment/completion entry for K. Anh. H 12/10 (Fr 1782m)
[2] IMSLP: Fugue in G major, K.443/404b — instrumentation and note that Mozart’s fragment is 37 measures, completed by Maximilian Stadler