GC and FE (→EE1) do not include an accidental before the bass note, which makes it to be interpreted as a B
. The version, present certainly also in [A], is given by us in the main text, with a cautionary 
. The version of GE, in spite of being most probably a result of a routine editorial revision (until this place the development is maintained in sharp keys and B is present also in the next bar), may be, however, considered an alternative authentic version in this case – according to Mikuli, Chopin added a corresponding 
in a copy of his pupil, Friederike Müller-Streicher (information from the Mikuli edition of Sonatas, Kistner, Leipzig 1879).
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category imprint: Differences between sources; Corrections & alterations
issues: GE revisions, Authentic post-publication changes and variants
notation: Pitch