Ernesto Nazareth's 'Arrufos' is a lively and virtuosic piece, characteristic of Brazilian salon music, blending elements of polka and choro. It is distinguished by its infectious rhythms and brilliant pianistic writing.
Develop rapid finger technique and precise articulation to navigate the energetic and syncopated passages.
Arrufos 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.
Arrufos is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.