Sonata in G major, K.391, L.79
Baroque Sonata Piano solo ~4 min
In brief

This G major sonata unfolds with playful energy and crisp rhythmic clarity, asking you to highlight the exchanges between short motifs and sparkling passagework rather than a broad, lyrical approach. You will specifically face Connaissance des formes (3.6/5): you must clearly map the binary sections and manage repeats so transitions feel proportioned and dynamics balanced between halves; and Ornements baroque (3.1/5) require clean trills and mordents executed with controlled finger action and a slight wrist motion so the ornaments sit within the line without blurring it. From the Baroque period, the sonata belongs to the large body of Scarlatti keyboard sonatas that explore bright textures and concise contrasts within short movements.

MusicCoach difficulty
54/100
Intermediate
Likely range : 20–88/100
Confidence : 53% · to confirm
BeginnerIntermediateAdvancedVirtuoso
Exam grade
On the syllabus: Grade 4 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
Combined exam syllabi
Grade 4
36/100 normalised
MusicCoach consensus
uncertain
Relative difficulty
42%
Among Domenico Scarlatti
46%
Era Baroque
34%
Genre
Estimated skills
Theory
Harmonic analysis
1
Theory
Knowledge of forms
1
Reading
Bass clef reading
1
Ornaments
Baroque ornaments
1
Style
Baroque style
1
Interpretation
Phrasing
1
Rhythm
General rhythm
1
Technique
Trills
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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