Issues : 4/4 or 2/2

b. 1

composition: Op. 35, Sonata in B♭ minor, Mvt I

in GC (→GE) & EE2

in FE (→EE1)

..

The  time signature in FE (→EE1) is almost certainly a result of inattention or manner of the engravers of FE, who in numerous pieces by Chopin seemed not to differentiate between  and  – see the Etudes, Op. 10 or the Impromptu in A major, Op. 29. Therefore, in the main text we give , written in GC (→GE), whose correctness and authenticity do not raise any doubts. This time signature – probably under the influence of GE – was introduced also in EE2.    

category imprint: Differences between sources

issues: EE revisions , Errors in FE , 4/4 or 2/2