This is an alternate title/version of the previous entry, representing a scholarly contemporary approach to traditional contrapuntal forms. It is distinct for its strict adherence to Baroque fugal techniques.
At Henle 7 this is a late-advanced work — the technical demands are serious and sustained. The main demands: independent voices that must each sing on their own line; fine finger independence within the hand; and chord voicing — bringing out one note inside a handful of others.
Beyond that, expect several simultaneous layers, each needing its own dynamic level.
Controlling the tonal balance between the subject and the accompaniment is vital for a successful performance.
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.
Chorale and Fugue in Cm is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above. In the RCM system it corresponds to about level 9.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 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 Chorale and Fugue in Cm lasts about 6 minutes.
Chorale and Fugue in Cm 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 Chorale and Fugue in C minor by Leslie Joseph Deutsch, Chromatic Fantasia and Fugue by Johann Sebastian Bach, Variations and Fugue on a Theme by Handel by Johannes Brahms — see the full similar-pieces list on this page.