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b. 9-27

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

..

In A1 these bars are provided with consecutive numbers from 1 to 19, which identify a fragment repeated subsequently as b. 40-58 and 84-102.

category imprint: Source & stylistic information

b. 40-58

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

..

In A1 these bars are marked in an abridged manner with empty bars, numbered from 1 to 19, which indicates that b. 1-19 should be repeated. In b. 40 Chopin additionally wrote out the L.H. part and wrote the first two notes of the R.H. part. Particular differences concerning the text in this bar are discussed in separate notes.

category imprint: Source & stylistic information

issues: Abbreviated notation of A

b. 60-68

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

No repeats in A1 & EE

Repeats in FE & GE

..

The version without repetition of b. 60-67 and 68-83 written down in A1 must be the original version, changed by Chopin in the last stage of proofreading of FE, since EE convey the version of A1. The repeat signs are also included in GE1; however, it is difficult to say whether they were added only just in print or still in [A2]; according to us – rather in the manuscript.
See also the next note. 

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE , Changed phrase length

b. 61-67

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

..

In A1 these bars are provided with consecutive letters from a to g, which identify a fragment repeated then as b. 77-83.

category imprint: Source & stylistic information

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