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b. 76

composition: Op. 50 No. 2, Mazurka in A♭ major

No mark in A1 (→FEEE)

Short accent in GE

Long accent, our alternative suggestion

..

Just like in the previous bars, the accent must have been added in the proofreading of GE1 or earlier, still in [A2]. Starting from the semiquaver, this bar is identical with b. 60, hence it is to be assumed that if it had not been for the simplified notation, Chopin would have repeated here the accent from that bar. Since it is a few of the accents of A1 that could be interpreted as long, we suggest that version also here. 

category imprint: Differences between sources; Editorial revisions; Corrections & alterations

issues: Authentic corrections of GE

b. 76

composition: Op. 50 No. 2, Mazurka in A♭ major

No marking in A1 (→FEEE)

in GE

..

The  indication was added by Chopin in the proofreading of GE1 or in [A2]. The notation of A1 (→FEEE) suggests a possibly similar effect through the missing beam on the 1st beat of the bar.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of GE

b. 76-77

composition: Op. 50 No. 2, Mazurka in A♭ major

Slur in A1 & GE

No slur in FE (→EE)

..

The missing slur must be a mistake of the engraver of FE (→EE).

category imprint: Differences between sources

issues: Errors in FE

b. 77-102

composition: Op. 50 No. 2, Mazurka in A♭ major

..

In A1 these bars are marked in an abridged manner with empty bars, first with letters from a to g, which requires b. 61-67 to be repeated, and then with numbers from 1 to 19, which evokes b. 9-27. The double bar line and the change of key signature are written out in b. 84. 

category imprint: Source & stylistic information

issues: Abbreviated notation of A

b. 77-80

composition: Op. 50 No. 2, Mazurka in A♭ major

Long accents in A1, literal reading

Short accents in FE (→EE) & GE

..

These bars are not written out in A1, since Chopin marked them in an abridged manner as repetition of b. 61-64. Just like there, the accents in b. 77 and 80 may be considered long, although it is probably simply an inaccuracy of notation.

category imprint: Graphic ambiguousness; Differences between sources

issues: Long accents