Tchaikovsky's "2 Piano Pieces" Op.1, a powerful and dramatic Allegro in C-sharp minor and a more lyrical Intermezzo, showcase his mastery of orchestral writing translated to the piano. The first piece, in particular, is known for its virtuosic demands and intense emotional content.
The main technical challenge lies in the immense power, agility, and stamina required for the rapid, dense chordal and octave passages.
2 Piano Pieces (Op.1) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 8.
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 2 Piano Pieces (Op.1) lasts about 7 minutes.
2 Piano Pieces (Op.1) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.