In FE (→GE1→GE2), the 
raising the 2nd semiquaver to b
is not cancelled, hence the 7th semiquaver should also be interpreted as b. It must be a mistake, corrected in EE and GE3. Although the reviser of GE3 corrected only the erroneously written note, adding a 
before it, in EE, the before the 2nd note was removed, which changed its pitch to b. This version, although possible both from the musical and pianistic point of view, is, however, certainly arbitrary – the traces visible in FE prove that the was added only at the stage of proofreading, almost certainly at Chopin's request, who, in turn, did not participate in the proofreading process of EE. In the main text, we give the version of FE, corrected by Chopin, written correctly in GE3.
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category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Errors in FE, Omissions to cancel alteration, GE revisions, Authentic corrections of FE
notation: Pitch