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b. 80

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

a1 tied in GC (→GE) & EE2

a1 repeated in FE (→EE1)

..

The authenticity of the tie sustaining a1 does not raise any doubts (it could have been added in GC even by Chopin himself). In turn, the version without the tie may be a result of an oversight of the engraver of FE. The slur in EE2 was most probably added on the basis of GE.

category imprint: Differences between sources

issues: EE revisions , Errors in FE

b. 80-81

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

Slur in GC

No slur or tie in FE (→EE1)

Tie in GE & EE2

..

The phrasing slur over both d2, visible in GC, was misinterpreted in GE as a tie. This non-authentic version was then repeated in EE2.

category imprint: Differences between sources

issues: Errors in GE

b. 80

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

e1 in GC (→GE) & FE2 (→EE,FE3FE4)

d1 in FE1

..

The d1 note in the chord at the beginning of the bar is certainly a mistake of the engraver of FE1, corrected in the subsequent FE.

category imprint: Differences between sources

issues: Errors in FE , FE revisions

b. 81

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

Staccato dots in GC

No dots in FE (→EE) & GE

..

It is hard to state whether the absence of staccato dots in GE is a result of an oversight or of a revision. 

category imprint: Differences between sources

issues: Errors in GE

b. 81

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

d-a-d1 in GC (→GE) & FE2 (→EE,FE3FE4)

a-din FE1

..

No d in the 1st crotchet in the L.H. is undoubtedly an oversight of the engraver of FE1.

category imprint: Differences between sources

issues: Errors in FE , FE revisions