This piece uses sparse material to create a compelling, narrative-driven soundscape. It is recognized for its careful use of resonance and modern harmonic sensibilities.
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; a left hand with real melodic or rhythmic responsibility of its own; and careful pedaling — clarity depends on the foot as much as the fingers.
The player must master the subtle voicing of internal lines to bring out the work's delicate thematic fragments.
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.
Entropy 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 Entropy lasts about 4 minutes.
Entropy 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 An evening on the Hudson - Serenade by Leopold de Meyer, Berceuse Op.57 by Frédéric Chopin, Bruyeres by Claude Debussy — see the full similar-pieces list on this page.