Pyotr Ilyich Tchaikovsky's 'Agitato and Allegro in E minor' is a fiercely energetic piece, likely an early or unpublished work, that explores turbulent emotions through rapid passagework. Its distinction comes from its raw, unbridled passion and dramatic contrasts.
Requires significant stamina and control for the rapid and wide-ranging technical demands.
Agitato and Allegro in E minor is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
Agitato and Allegro in E minor is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.