a2 in 
Without access to [AG], it is impossible to determine whether and which version Chopin considered to be final. The general concordance between AI and GE suggests that this version was created first; however, even if it was the case, it does not mean that an alternative idea – the version of AF – was already the final word, since there are numerous examples, supported by sources, of returns to original versions, which was poignantly described by George Sand. Therefore, having a choice between two equal authentic versions, in the main text we give the text of GE, which is the principal source adopted for the entire op. 50.
category imprint: Differences between sources; Corrections & alterations
issues: Chopin's hesitations, Accompaniment changes, Enharmonic corrections
notation: Pitch