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b. 12

composition: Op. 26 No 2, Polonaise in E♭ minor

GE2 (→GE3GE4)

Our suggestion

..

Chopin added the staccato dot over e and stems extending the sound of g1 on the 2nd and 4th quavers in the L.H. in the proofreading of FE1 (→FE2). We consider this correction, repeated in bar 60, to be intentionally referring to the return of the main section of the Polonaise too (bars 116 and 164), as in A it was only signalised as repetition of the first section.
According to us, extending the top notes of the third only is either a simplified notation or a result of misunderstanding of Chopin's proofreading entry. Therefore, in the main text we assign the crotchet stems to both notes of the e1-gthird. The versions of the remaining editions are either inaccurate (EE1) or arbitrarily changed (GE).

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 13-14

composition: Op. 26 No 2, Polonaise in E♭ minor

Triads in A

Dyads in FE (→EE)

Triad and dyad in GE

..

The original version of A was changed by Chopin in the proofreading of FE1 (→EE), which, as the composer's latest decision, we include in the main text. GE included only the change in bar 14, which can point to a two-stage proofreading of FE1 – deletion of b on the 6th quaver in bar 13 could have been introduced in the last phase of proofreading, already after having sent the copy to the German editor. According to us, it is, however, more likely that GE arbitrarily added this note by analogy to bar 14, which, except for this detail, does not differ from bar 13 at all. Similarly in all repetitions of these bars – bars 61-62, 117-118 and 165-166. 

category imprint: Differences between sources; Corrections & alterations

issues: GE revisions , Authentic corrections of FE

b. 14

composition: Op. 26 No 2, Polonaise in E♭ minor

..

There are no naturals rising a and d1 to a and d1 in A. Chopin's mistake resulted supposedly from a hasty correction—the composer initially marked the L.H. part in this bar as a repetition of the previous bar, and only after having spotted the diffrence on the 2. quavers of both bars wrote it out in full. The accidentals were added in FE1 and all the subsequent editions.

category imprint: Interpretations within context; Differences between sources

issues: Errors resulting from corrections , Omission of current key accidentals , Errors of A , Authentic corrections of FE

b. 15

composition: Op. 26 No 2, Polonaise in E♭ minor

..

We add a cautionary  next to a2 in the R.H.

category imprint: Editorial revisions

b. 15

composition: Op. 26 No 2, Polonaise in E♭ minor

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A (→FEEE1) has no  rising g1 to g1 on 4th L.H. quaver. The obvious oversight was corrected in GE and EE2. Similarly in bars 63, 119 and 167.

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves