Allegro moderato (first movement

Köhler was the great Königsberg pedagogue of the mid-nineteenth century: his sonatinas are not concert works but study works, written to teach Classical-style two-hand textures with the kind of clarity that Clementi and Kuhlau had set out a generation earlier. Op. 300 No. 93 sits firmly in that lineage — Sonatina-form first movement at miniature scale, in a comfortable G major.

Technically the Allegro moderato tests Alberti-bass evenness and shape. The left hand carries a continuous broken-triad accompaniment; the right hand sings a tuneful, periodic melody (eight-bar phrases) over the top. The student must keep the left hand quiet and even while the right hand projects a clear, singing line, and must execute simple cadential ornaments cleanly without holding up the pulse.

Two pitfalls. First, the Alberti bass becomes louder than the melody — the constant motion fools the ear into giving it weight. Practise the left hand alone at pp until you can deliver it without effort, then add the right hand on top. Second, students play the secondary theme at the same dynamic and colour as the opening; the score asks for a clear textural shift — the left-hand pattern lightens and the right-hand line takes a slightly cooler tone.

Listening: Clementi Sonatina Op. 36 No. 1 and Kuhlau Sonatina Op. 20 No. 1 (PD recordings widely available on Musopen and IMSLP audio) sit at the same technical level and calibrate the right Classical poise — Köhler is writing into that tradition.