Constructed around a tone row derived from Anton Webern, this fantasy applies serialist methodology to a keyboard format. It creates a stark, angular soundscape that demands high precision.
At Henle 7 this is a late-advanced work — the technical demands are serious and sustained. The main demands: fine finger independence within the hand; precise articulation — the difference between crisp and blurred is the piece; and sharp dynamic and character contrasts held together in one arc.
Beyond that, expect chord voicing — bringing out one note inside a handful of others, and several simultaneous layers, each needing its own dynamic level.
Execution requires precise control over non-tonal intervals and sudden dynamic shifts.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Fantaisie sur une série de Webern is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above. In the RCM system it corresponds to about level 10.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 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 Fantaisie sur une série de Webern lasts about 4 minutes.
Fantaisie sur une série de Webern 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 Fantaisie contrapuntique sur un cramignon liégeois by Guillaume Lekeu, 'Musical composition, an Ineffable Act between Fantasy and Rigour' by Liana Alexandra, Fantasia and Fugue in E minor by Leo Bykhovsky — see the full similar-pieces list on this page.