Klavierstück in F major (K. Anh.A 6)
di Wolfgang Amadeus Mozart
Mozart’s Klavierstück in F major (K. Anh.A 6; also K. 33B) is a tiny keyboard miniature sketched in Zürich in early October 1766, when he was ten. Though sometimes inconsistently described in secondary catalogues, the surviving source points to a short Allegro for solo clavier.
Mozart’s Life at the Time
In autumn 1766, Wolfgang Amadeus Mozart (1756–1791) and his family were nearing the end of their long European tour, with a stop in Zürich. The autograph of K. Anh.A 6 is tied to a Zürcher Musikkollegium circular dated 30 September 1766, inviting the public to concerts by “the young Master Mozart” and his sister on 7 and 9 October—precisely the occasion on which the piece was likely written down as a quick souvenir or practical jotting for performance [1] [2].
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Musical Character
Despite occasional conflicting labels in databases, the Mozarteum’s Köchel-Verzeichnis entry classifies K. Anh.A 6 as an extant, “anonymous” piano piece in F major, linked with Mozart as arranger and notated for clavier [1]. The piece is a brief Allegro—26 bars in length—cast in two repeated sections (12 + 14 bars), a straightforward binary design typical of the young Mozart’s occasional occasional keyboard sketches from the tour years [3]. Even on this modest scale, its lively surface and clear phrasing suggest music meant to be dashed off and readily played, fitting a ten-year-old already accustomed to public display at the keyboard.
[1] Internationale Stiftung Mozarteum, Köchel-Verzeichnis: KV Anh. A 6 – “Anonymous, Piano piece in F” (dating, key, status, instrumentation).
[2] Bärenreiter preface PDF (discussion of the Zürich circular dated 30 Sept 1766 and concerts 7/9 Oct 1766; context for the autograph).
[3] Wikipedia: “Piece in F for Keyboard, K. 33B (Mozart)” (length, tempo marking, two-section repeated form; Zürich context summary).