Anthony Green's Diptych is a modern work that relies on minimalist textures and precise pedaling. The piece is characterized by its sparse yet evocative harmonic language.
At Henle 5 this is a late-intermediate piece — technically substantial, with musical demands to match. The main demands: chord voicing — bringing out one note inside a handful of others, and careful pedaling — clarity depends on the foot as much as the fingers.
The performer must focus on delicate voicing and sustaining long, atmospheric tones without cluttering the texture.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Diptych 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 Diptych lasts about 5 minutes.
Diptych 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 Clair de lune - piano by Claude Debussy, Prelude in D-flat major, No. 15 by Frédéric Chopin, La cathédrale engloutie by Claude Debussy — see the full similar-pieces list on this page.