Les tierces alternées
Piano solo 3 min
In brief

The piece foregrounds a carpet of alternating thirds that produces a crisp rhythmic relief and a shifting brightness, giving it a lively, almost percussive character despite the piano’s soft timbre. Technically, the “Technique générale” (2.5/5) will require precise finger and wrist coordination to cleanly chain the groups of thirds without upsetting the hand balance, and the “Legato” (2.5/5) calls for connecting those successive intervals so as to maintain a continuous musical line despite jumps and alternation; in practice you will work on controlled slides and finger releases. The provided information lists the period as unknown, but it is a solo piano piece belonging to Debussy’s piano repertoire rather than to his larger orchestral or vocal works.

MusicCoach difficulty
75/100
Advanced
Likely range : 54–96/100
Confidence : 55% · fair confidence
BeginnerIntermediateAdvancedVirtuoso
Exam grade
About grade 8

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
Henle Verlag
8
85/100 normalised · 3 obs.
MusicCoach consensus
uncertain
Relative difficulty
84%
Among Claude Debussy
91%
Era
Genre
Estimated skills
Style
Impressionist style
1
Technique
Legato
1
Interpretation
Phrasing
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.

See the whole progression