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b. 91

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

No fingering in GC (→GE) & FE1 (→FE2EE1)

Fingering in FE3 (→FE4) & EE2

..

Chopin added the fingering of the bottom voice of the R.H. while proofreading FE3 (→FE4). It was repeated in EE2 too.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 91

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

No f2 in chord in FE1

f2 in GC (→GE) & FE2 (→EE,FE3FE4)

..

The absence of f2 in the 1st chord is certainly one of numerous mistakes of FE1.

category imprint: Differences between sources

issues: Errors in FE , FE revisions

b. 91

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

Wedge in GC

No mark in FE (→EE) & GE1

Dot in GE2

..

The wedge in GC is very clear, so both the omission of the sign in GE1 and the fact of replacing it with a dot in GE2 are surprising.

category imprint: Differences between sources

issues: Errors in GE , GE revisions , Wedges

b. 91

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

Staccato dot in GC

No mark in FE (→EE) & GE

..

The missing staccato dot in all sources except for GC is probably a result of the engravers' inaccuracy.

category imprint: Differences between sources

issues: Inaccuracies in GE

b. 91-92

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

Slur from bar 91 in GC, FE (→EE) & GE2

Slur from bar 92 in GE1

..

The fact that the slur in GE1 begins later must be a mistake of the engraver; he omitted the part of the slur falling on b. 91, which ends the line. The error was corrected in GE2.

category imprint: Differences between sources

issues: Errors in GE , GE revisions