Issues : Cautionary accidentals
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b. 22
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composition: Op. 10 No 2, Etude in A minor
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In CLI the 10th semiquaver is written as an a category imprint: Interpretations within context; Differences between sources; Corrections & alterations issues: GE revisions , Cautionary accidentals , Errors of CLI |
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b. 23-24
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composition: Op. 10 No 2, Etude in A minor
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Similarly as two bars before, Ap features chords with the span of an octave on the 2nd beat of these bars. In the main text we give the chords with the span of a seventh present in the remaining sources.
In bar 23 there is no cautionary category imprint: Differences between sources issues: Chopin's hesitations , Cautionary accidentals , Accompaniment changes |
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b. 26
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composition: Op. 10 No 2, Etude in A minor
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The cautionary category imprint: Differences between sources issues: Cautionary accidentals |
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b. 27
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composition: Op. 10 No 2, Etude in A minor
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In CLI and FEcor there are no accidentals before the fourth in the lower voice, which is certainly a mistake. category imprint: Differences between sources issues: Errors in FE , GE revisions , Cautionary accidentals , Authentic corrections of FE , Errors of CLI |
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b. 27
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composition: Op. 10 No 2, Etude in A minor
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In one of the last proofreadings of FE the A-a octave was preceded with naturals, which are highly unjustified here. The signs were probably added – by Chopin or perhaps by the reviser who worked with him – together with the necessary category imprint: Differences between sources issues: GE revisions , Cautionary accidentals , Authentic corrections of FE |
2, which constitutes a natural cause of changes in the notation of the accidentals appearing in the further part of the bar. Lack of the 
returning g2 on the penultimate semiquaver is, however, a patent error. In the majority of sources there is a reminding (?) 
before the last note in the bar – only 
