1AbAcAbA is a contemporary experimental work utilizing a rondo-based formal structure to explore tonal ambiguity. It is distinctive for its rigorous use of recurring motifs that are transformed through varied harmonic contexts.
The main challenge is maintaining a cohesive architectural flow through the changing sections of the rondo.
Comparable difficulty and character — good candidates for what to learn next.
1AbAcAbA 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 1AbAcAbA lasts about 4 minutes.
1AbAcAbA 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 102 by Sergio Aarón Pérez, 114 by Sergio Aarón Pérez, Blue Towers by Irving Gifford Fine — see the full similar-pieces list on this page.