Joachim Raff's '3 Piano Pieces' Op. 164 are substantial Romantic works, often virtuosic and demanding, typical of his prolific output. They showcase his mastery of piano technique and a flair for dramatic expression.
Executing the rapid arpeggios and powerful chordal passages with stamina and precision is the main technical hurdle.
3 Piano Pieces (Op.164) is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above. In the RCM system it corresponds to about level 10.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
3 Piano Pieces (Op.164) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.