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b. 51-53

composition: Op. 25 No 10, Etude in B minor

 in GC (→GE1) & EE

No signs in FE

 in GE2 (→GE3)

..

The  signs, highlighting the descending line of the tenor voice starting from a syncopation, were probably added by Chopin in GC and base text to EE (in this case it is hard to clearly state whether the signs in GC are written by Chopin). In analogous bars 71-72, a relevant sign is only in GC. The change of placement and range of the signs in GE2 (→GE3) was probably aimed at clarifying the notation.

category imprint: Differences between sources

issues: GE revisions

b. 56

composition: Op. 25 No 10, Etude in B minor

No tie in GC (→GE1) & GE3

d-e tie in FE, EE & GE2

..

The missing slur combining d and e in GC (→GE1) is most probably the copyist's mistake – in the analogous bar 76 a relevant slur is present in GC. Both the addition of the slur in GE2 and its removal in GE3 are arbitrary changes, harmonising both places. 

category imprint: Differences between sources

issues: GE revisions , Errors of GC

b. 58

composition: Op. 25 No 10, Etude in B minor

No mark in GC (→GE) & EE

Accent in FE

..

The accent under a1 is only in FE. In GC one can see deletion of this sign, yet other, consistent changes in bars 58-60 and 78-70 prove that Chopin eventually decided to mark – with an accent and slur – the beginning of the phrase of the bottom voice exactly in this place. 

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 58-60

composition: Op. 25 No 10, Etude in B minor

No slur in GC (→GE) & EE

Slur for lower voice in FE, contextual interpretation

..

The slur embracing the phrase in the middle voice was added by Chopin most probably in the proofreading of FE. The sign is, however, inaccurately placed – in bar 58, ending a line of the text, the slur begins on the stave, yet its continuation in bars 59-60 is under the stave, which hinders its interpretation. In the analogous place in bars 78-80, the slur is already clearly placed.

category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations

issues: Inaccuracies in FE , Authentic corrections of FE

b. 59-62

composition: Op. 25 No 10, Etude in B minor

No signs in GC (→GE) & EE

Pedalling in FE

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE