Godowsky's paraphrase is a pyrotechnic masterpiece that transforms Johann Strauss's operetta melodies into a dense, multi-layered transcription. It is notable for its contrapuntal complexity and extreme demands on keyboard facility.
At Henle 9 this is among the most demanding works in the piano literature. The main demands: fast passage work that stays light and even at tempo; sweeping arpeggio figures that must stay smooth across positions; and octave passages that demand a relaxed wrist to avoid tension.
Beyond that, expect a waltz lilt that needs charm and a flexible left hand, and rubato that must breathe naturally without losing the pulse.
At roughly 10 minutes, stamina and memory become part of the challenge — plan practice in sections.
Mastering the constant stream of rapid arpeggios and chromatic inner voices requires extreme finger independence and wrist flexibility.
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.
Concert Paraphrase on J. Strauss's 'Die Fledermaus' is rated Henle level 9 of 9 — virtuoso repertoire, roughly concert / virtuoso level. In the RCM system it corresponds to about level 10.
You should be comfortable at Henle level 9 — meaning you can already play level 8–9 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 Concert Paraphrase on J. Strauss's 'Die Fledermaus' lasts about 10 minutes.
Concert Paraphrase on J. Strauss's 'Die Fledermaus' 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 Bamboula by Louis Moreau Gottschalk, Hungarian Rhapsody No. 2 in C-sharp minor by Franz Liszt, Rhapsody in Blue (Solo Piano) by George Gershwin — see the full similar-pieces list on this page.