This is a contemporary cadenza composed for Beethoven's first piano concerto. It seeks to modernize the harmonic language while maintaining the structural integrity of the classical form.
The primary challenge is maintaining clarity and technical precision in virtuosic passages that break from traditional stylistic expectations.
Comparable difficulty and character — good candidates for what to learn next.
Cadenza to Beethoven: Piano Concerto No.1 (Op.15) is rated Henle level 8 of 9 — concert repertoire, roughly diploma level.
You should be comfortable at Henle level 8 — meaning you can already play level 7–8 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 Cadenza to Beethoven: Piano Concerto No.1 (Op.15) lasts about 3 minutes.
Cadenza to Beethoven: Piano Concerto No.1 (Op.15) 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 Hungarian Rhapsody No. 2 in C-sharp minor by Franz Liszt, Bourrée fantasque by Emmanuel Chabrier, Gaspard de la nuit by Maurice Ravel — see the full similar-pieces list on this page.