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b. 18
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composition: Op. 10 No 12, Etude in C minor
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The accent of A could have been overlooked in FE (→GE,EE), therefore, in the main text we give it in brackets. category imprint: Differences between sources issues: Inaccuracies in FE |
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b. 18
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composition: Op. 10 No 12, Etude in C minor
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In EE4 a category imprint: Differences between sources issues: EE revisions |
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b. 18
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composition: Op. 10 No 12, Etude in C minor
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Lack of dim. both in A and GE most probably means that Chopin added it in the last proofreading of FE (→EE). category imprint: Differences between sources; Corrections & alterations issues: Authentic corrections of FE |
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b. 18
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composition: Op. 10 No 12, Etude in C minor
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Lack of the category imprint: Interpretations within context; Differences between sources issues: Omissions to cancel alteration , Errors of A , Authentic corrections of FE |
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b. 19-24
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composition: Op. 10 No 12, Etude in C minor
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In EE Fontana added the fingering repeated from analogous bars. In bars 19-23 it does not differ from the fingering foreseen by Chopin. In bar 24 Fontana adapted Chopin's fingering of the similar figure in bar 10 to different intervals. category imprint: Differences between sources issues: EE revisions |
in 
returning f is most probably Chopin's oversight here. The composer's concentration may have decreased when, after the chromatised bar 17, he reached the diatonic progression in the main key. In any case, the accidental added in a proofreading of 
