Sonata in B flat major, K.439, L.47
Baroque Sonata Piano solo ~4 min
In brief

This B-flat major sonata feels lively yet taut, with quick leaps and rapid responses that require clean articulation to reveal the underlying dance drive rather than blur it. Technically, Connaissance des formes (3.6/5) matters here: you must identify and balance the binary sections and manage repeats so phrasing and dynamics remain coherent, and Ornements baroque (3.1/5) demand precise fingering and wrist control to execute short mordents and ornamentation without smudging the line. From a factual standpoint, the piece belongs to the Baroque keyboard sonata repertoire of Scarlatti, originally conceived for harpsichord but often played on piano, and it typifies his interplay between left- and right-hand textures and broken-chord effects. I do not provide a recommended recording because I prefer not to cite a specific interpretation unless I am certain of it.

MusicCoach difficulty
45/100
Intermediate
Likely range : 33–57/100
Confidence : 38% · to confirm
BeginnerIntermediateAdvancedVirtuoso
Exam grade
About grade 5

Estimated from our difficulty score, not taken from an exam syllabus. Checked against 333 works on the ABRSM syllabus: the exact grade is right 7 times out of 10, and within one grade 99 times out of 100.

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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Relative difficulty
15%
Among Domenico Scarlatti
22%
Era Baroque
13%
Genre
Estimated skills
Theory
Harmonic analysis
1
Theory
Knowledge of forms
1
Reading
Bass clef reading
1
Style
Baroque style
1
Ornaments
Baroque ornaments
2
Pedaling
Half-pedalling
1
Technique
Double notes
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.

See the whole progression