WTC I Prelude and Fugue in F-sharp minor BWV 859
PreludeFugue Piano solo ~6 min
In brief

This Prelude and Fugue in F-sharp minor has a contemplative yet tense character, built from chromatic lines and contrapuntal entries that require sustained inner listening to keep the musical thread clear. You will specifically face the challenge of Polyphony in three voices or more (4.4/5): you must separate and balance each voice with precise finger control and clear hand distribution so entries remain audible; Harmonic Analysis (4.4/5) is also essential here because understanding the harmonic progressions helps shape phrases and anticipate modulations to manage breaths and tensions. The piece belongs to The Well-Tempered Clavier, Book I, and is a central study in Bach’s keyboard output for learning counterpoint and modulation on a keyboard instrument.

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Sheet music

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MusicCoach difficulty
59/100
Intermediate
Likely range : 48–70/100
Confidence : 71% · fair confidence
BeginnerIntermediateAdvancedVirtuoso
Exam grade
On the syllabus: Grade 7 Trinity_London

Official level, taken from the exam syllabus.

Difficulty estimate by MusicCoach on a scale of 1 to 100.

Where this work sits
050100

Most works cluster between 45 and 65: a small score gap often marks a real step. The highlighted bar shows this work among those for the same instrument.

The MusicCoach difficulty measures a work's overall demands (technique, reading, stamina) on a shared 0-100 scale, consolidated from editorial and pedagogical reference points (Henle, exam syllabuses, curation) and our own analyses. It measures neither musical value nor the practice time YOU will need: two musicians of the same level can experience the same work very differently depending on their strengths (hands used to octaves, quick sight-reading…). The confidence reflects how many reference points sit behind the score and how well they agree — a lightly documented score is flagged “to validate”. For a truly personal bearing, the diagnostic and your space compare each work to YOUR estimated level, which the score alone cannot do.

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Difficulty sources
Henle Verlag
4
38/100 normalised · 4 obs.
Henle Verlag
5
50/100 normalised · 4 obs.
Combined exam syllabi
Grade 7
66/100 normalised · 2 obs.
Relative difficulty
70%
Among Johann Sebastian Bach
71%
Era
53%
Genre
Estimated skills
Theory
Knowledge of forms
1
Theory
Harmonic analysis
1
Technique
Three-or-more-voice polyphony
2
Technique
Legato
1
Tone
Touch control
1
What to play next?

Each suggestion combines difficulty gap, risk, confidence and skill overlap. The first two cards in each column are the most useful pedagogically.

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