This is a contemporary chromatic fugue composed in a dense contrapuntal style. It is distinctive for its complex subject development and modern harmonic language.
At Henle 6 this is an advanced piece that assumes fluent technique and rewards mature interpretation. The main demands: independent voices that must each sing on their own line; fine finger independence within the hand; and several simultaneous layers, each needing its own dynamic level.
Beyond that, expect precise articulation — the difference between crisp and blurred is the piece.
Maintaining clarity of individual voices within the dense polyphonic texture is the primary technical challenge.
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.
Chromatic Fugue for Piano is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 Chromatic Fugue for Piano lasts about 4 minutes.
Chromatic Fugue for Piano 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 Aleatory by Earl Richard Drehmer, Chromatic Fantasia and Fugue in D minor by Johann Sebastian Bach, Ciacona in D minor, P.41 by Johann Pachelbel — see the full similar-pieces list on this page.