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b. 79-81

composition: Op. 63 No. 1, Mazurka in B major

..

In the main text we add cautionary naturals to e2 in bars 79 and 81. Both accidentals were also added in GE3, while the latter appears also in AI.

category imprint: Differences between sources; Editorial revisions

issues: GE revisions , Cautionary accidentals

b. 79-81

composition: Op. 63 No. 1, Mazurka in B major

in AI in bs 79 & 81

2 acciaccaturas in FE (→EEW)

2 appoggiaturas in GE & EEC

..

Chopin changed the mordents in bars 79 and 81 to short grace notes probably while creating [A]. The non-slashed grace notes in GE and EEC were arbitrarily inserted by the engravers, who did not use slashed grace notes in the entire Mazurka even once, and in the case of GE, the entire opus 63 is devoid of them.

category imprint: Differences between sources; Corrections & alterations

issues: Inaccuracies in GE , EE inaccuracies

b. 79

composition: Op. 63 No. 1, Mazurka in B major

at end of bar in AI

on 3rd beat in FE (→GE,EE)

category imprint: Differences between sources

b. 80

composition: Op. 63 No. 1, Mazurka in B major

under 2nd crotchet in AI

before 3rd crotchet in FE (→GE,EE)

category imprint: Differences between sources

b. 81

composition: Op. 63 No. 1, Mazurka in B major

Rest in AI & FE1 (→GE)

F in FE2 (→EE)

..

As in bar 75, Chopin added a crotchet to the L.H. part (instead of the rest) on the 3rd beat of the bar while proofreading FE2 (→EE). 

category imprint: Differences between sources; Corrections & alterations

issues: Accompaniment changes , Authentic corrections of FE