Alkan's '3 Scherzi di bravoure' are monumental works that push the boundaries of pianistic technique, demanding extreme virtuosity and endurance. These pieces are characterized by their immense scale, formidable technical challenges, and dramatic intensity.
Mastering the extreme stretches and rapid-fire passages requires exceptional finger strength and precision.
3 Scherzi di bravoure (Op.16) 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 3 Scherzi di bravoure (Op.16) lasts about 20 minutes.
3 Scherzi di bravoure (Op.16) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.