A virtuosic transcription of the Schubert lied, reimagined by Count Zichy for the piano. It is notable for its taxing technical requirements, especially considering the composer's history as a one-armed pianist.
At Henle 6 this is an advanced piece that assumes fluent technique and rewards mature interpretation. The main demands: fast passage work that stays light and even at tempo; octave passages that demand a relaxed wrist to avoid tension; and sharp dynamic and character contrasts held together in one arc.
Beyond that, expect a left hand with real melodic or rhythmic responsibility of its own.
The technical demand of maintaining the dramatic momentum and virtuosic runs requires exceptional hand independence and stamina.
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.
Erlkonig is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 10.
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 Erlkonig lasts about 4 minutes.
Erlkonig 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 Prelude in C-sharp minor, No. 2 by Sergei Rachmaninoff, Passacaglia by George Frideric Handel, 32 Variations in C minor by Ludwig van Beethoven — see the full similar-pieces list on this page.