These variations represent Skalkottas's rigorous approach to atonality and structural complexity. They are distinctive for their uncompromising harmonic language and fragmented rhythmic vitality.
The primary challenge is navigating the highly chromatic, non-tonal voice leading while maintaining precise articulation.
Comparable difficulty and character — good candidates for what to learn next.
15 Little Variations is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of 15 Little Variations lasts about 8 minutes.
15 Little Variations is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Bergamasca by Girolamo Frescobaldi, Capriccio XV in F major, FbWV 515 by Johann Jacob Froberger, Capriccio X in D minor, FbWV 510 by Johann Jacob Froberger — see the full similar-pieces list on this page.