Nin’s variations blend Spanish harmonic flavors with the structural discipline of the 19th-century variation form. It is a sophisticated nod to the past, modernized through sharp, percussive accentuation.
Developing the stamina to maintain the variation momentum while highlighting thematic changes is vital.
Comparable difficulty and character — good candidates for what to learn next.
'1830' Variations is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 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.
A typical performance of '1830' Variations lasts about 8 minutes.
'1830' Variations is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include 1830 - Variaciones sobre un tema frivolo by Joaquin Nin, 16 Waltzes by Johannes Brahms, Waltz No. 2 by Dmitri Shostakovich — see the full similar-pieces list on this page.