Sonate K.545 « Facile » : I. Allegro
Sonata Piano solo
In brief

The first movement unfolds with a bright, transparent clarity: singing themes, crisp phrase exchanges and a rhythmic forward drive that requires momentum without force. You will need to focus especially on Style classique (4.6/5) by shaping phrases and balancing the lyrical right hand with the accompanying left hand, and on Gammes et arpèges (4.6/5) which demand relaxed, even finger action to keep rapid passages clean and consistent. It stands as a representative piece in Mozart's piano solo repertoire, often used to illustrate formal economy and classical elegance. I am not naming a reference recording here because I prefer not to cite a performer unless I am completely certain.

MusicCoach difficulty
41/100
Elementary
Likely range : 33–48/100
Confidence : 47% · to confirm
BeginnerIntermediateAdvancedVirtuoso
Exam grade
About grade 4 to 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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Difficulty sources
MusicCoach expertise
45
45/100 normalised
Relative difficulty
35%
Among Wolfgang Amadeus Mozart
35%
Era
7%
Genre
Estimated skills
Technique
Scales and arpeggios
1
Technique
Staccato
1
Theory
Knowledge of forms
1
Style
Classical style
2
Theory
Harmonic analysis
1
Technique
Hand independence
1
Sight-reading
Sight-reading
1
Technique
Legato
1
Rhythm
General rhythm
1
Technique
General technique
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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