BWV 905 is an authentic contrapuntal masterwork by Johann Sebastian Bach, likely intended for harpsichord. Its fugue is notable for its vigorous, motoric energy and complex layering of voices.
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 precise articulation — the difference between crisp and blurred is the piece.
Beyond that, expect continuous sixteenth-note figuration that must ripple, not chatter, and chord voicing — bringing out one note inside a handful of others.
Maintaining consistent rhythmic pulse throughout the dense contrapuntal textures is the central technical demand.
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.
Lesser-known works by the same hand, at a comparable level.
Fantasia and Fugue in D minor (BWV 905) 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 10.
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 Fantasia and Fugue in D minor (BWV 905) lasts about 5 minutes.
Fantasia and Fugue in D minor (BWV 905) 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 Chromatic Fantasia and Fugue by Johann Sebastian Bach, Fantasia and Fugue, C minor by Johann Sebastian Bach, Das Wohl Temperierte Klavier, vol I, Fugue 18 by Johann Sebastian Bach — see the full similar-pieces list on this page.