GC
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The E-e octave at the end of the bar in GC (→GE) is almost certainly the copyist's mistake, who inaccurately repeated the previous bar. In the version of FE and EE, adopted in the main text, Chopin smoothly changed the interval between the parts of both hands from octave to sixth, as part of the D minor chord, being the base of the 2nd half of the bar.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Errors of GC
notation: Pitch