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b. 308

composition: Op. 2, Variations, complete

f1 in chord in AsI & A (→GEEE,FESB)

No f1 in FE1 (→FE2)

..

Due to the traces of removal of f1 from the 1st R.H. chord visible in FE, it is almost certain that this place underwent Chopinesque proofreading. 

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 308-309

composition: Op. 2, Variations, complete

..

The corrections and erasures visible in A reveal that Chopin initially wrote a slur only over the semiquaver sextuplet. Similar changes of conventional slurs related to the notation of irregular groups into motivic slurs are also to be found in other pieces by Chopin, e.g. in the Etude in C minor, Op. 10 No. 12, bars 52-62.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Triplet slurs

b. 309

composition: Op. 21, Concerto in F minor, Mvt I

..

In A there is no  raising a to before the 2nd quaver. The sign was added in EE and GE2.
In EE the  before the 3rd quaver (e1) was overlooked.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , Errors in EE , GE revisions , Omission of current key accidentals , Inaccuracies in A

b. 309

composition: Op. 21, Concerto in F minor, Mvt I

Different slurs in A

Half-bar slurs in GE1

No slurs in FE

Slurs from 2nd quaver in EE & GE2

..

In the 1st half of the bar the slur in the L.H. was corrected in A – it was most probably Chopin that added a new beginning to the original slur over the entire group of quavers, so that the corrected slur would start from the 2nd quaver. GE1 did not include this correction, whereas GE2 copied it also in the second slur in this bar. The absence of slurs in FE is a patent oversight, which was revised in EE, by providing with slurs the notes which were not marked staccato. The last version may be considered to be justified, yet due to a likely though unobvious inaccuracies in the notation of the articulation of the L.H. in bars 309-310, in the main text we leave the version of A

category imprint: Graphic ambiguousness; Differences between sources

issues: EE revisions , Errors in FE , Inaccuracies in GE , Corrections in A , GE revisions

b. 309

composition: Op. 21, Concerto in F minor, Mvt I

..

The traces of erasure, visible in A, allow to read the original version of the 1st half of the bar, in which the last note was an a1. In this version, the 3rd and 4th quavers were written in the treble clef, in which the removed note was written; however, it is unknown whether the correction of the moment of the beginning of the slur is to be linked to the change of the last note.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Accompaniment changes