| Section | Tempo / Style | Musical Description | | :--- | :--- | :--- | | | Andantino (calmly) | A lyrical, 16-bar melody with lush 7th and 9th chords. Sounds like a standard ballad. | | Var. 1 | L'istesso tempo | Left-hand stride piano patterns (reminiscent of Fats Waller/Art Tatum). | | Var. 2 | Valse | A waltz, but with off-beat right-hand syncopations and chromatic blues notes. | | Var. 3 | Vivace | Fast, toccata-like figuration. Classical perpetual motion meets bebop scales. | | Var. 4 | Meno mosso (e moll) | A dark, nocturne-like variation in E minor. Melancholic and introspective. | | Var. 5 | Allegro molto | Virtuosic octave passages and big-band "shout chorus" writing. | | Var. 6 | Lento | A slow, blues-infused improvisation. Sparse, expressive, and highly rubato. | | Var. 7 | Allegro giocoso | Playful, syncopated, almost comical. Use of sudden dynamic shifts and glissandi. | | Var. 8 | Andante con moto | A "walking bass" in the left hand with a smooth, lyrical right-hand line. | | Var. 9 | Presto | The climax: relentless, driving bebop head. Very fast, angular, and technically demanding. | | Coda | (no tempo change) | A brilliant, crashing finish that recalls fragments of the theme. |
The faster variations act as etudes in themselves, demanding a level of digital dexterity that few pianists possess. Kapustin often employs complex cross-rhythms and syncopations that obscure the downbeat, a technique that creates the illusion of improvisation. The driving force of these variations is the "swing" feel, a rhythmic concept that is notoriously difficult to notate accurately in Western music notation. Kapustin solves this by writing intricate rhythmic patterns that force the performer to phrase naturally in a jazz style to execute them properly. Nikolai Kapustin Variations Op 41.pdf