Fugue for Piano (Fragment) in G minor, K. 154
by Wolfgang Amadeus Mozart
Mozart’s Fugue in G minor (Fragment), K. 154 (also catalogued as K. 385k), is a surviving torso of a solo-keyboard fugue, generally dated to Vienna in 1782—when the 26-year-old composer was newly established as a freelance musician and keenly engaged with “learned” counterpoint.[1]
What Is Known
Only a single, incomplete fugue for solo keyboard survives under K. 154: one movement/section, explicitly described as a fragment in modern cataloguing.[1] The autograph is extant (i.e., the music comes down in Mozart’s own hand), and modern editorial commentary groups it with other early-1780s fugal studies, placing it in the same Viennese period as several related fragments.[2] That said, the piece was later “completed” by Simon Sechter for 19th-century publication; current scholarly editions typically present Mozart’s text as it stands, without attempting to finish what he left unfinished.[2]
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Musical Content
What survives is enough to show Mozart thinking like a contrapuntist rather than a salon virtuoso. The fugue subject is notably irregular—an “asymmetrical construct” whose opening and closing shapes echo one another—and it seems to invite devices such as stretto (overlapping entries) or other tight-knit artifices.[2] Yet, in the surviving portion Mozart does not carry those possibilities very far; the fragment breaks off before a larger design can be confirmed, leaving an impression of a sharply characterized idea tested on the page, then abandoned. In this respect K. 154 fits persuasively among Mozart’s Viennese explorations of fugue and strict style around 1782, a year that also saw him integrating counterpoint into larger, finished works (not least the string quartets begun that summer).
[1] IMSLP work page: Fugue in G minor, K.154/385k (general info; fragment status; instrumentation; dating as 1782).
[2] Bärenreiter preface PDF (Neue Mozart-Ausgabe-related editorial notes): discusses the G minor fugue fragment’s autograph survival, character of the subject, and Sechter’s 19th-century completion; notes modern presentation of Mozart’s incomplete text.