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b. 83
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composition: Op. 21, Concerto in F minor, Mvt II
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Both the sixth present in A and the c2-c3 octave in GE1 (→FE) are almost certainly mistakes – cf. analogous bar 15. In A Chopin wrote one ledger line too little (errors in the number of ledger lines are – except for accidentals – definitely the most frequent type of his pitch errors), whereas the change in GE1 may be explained by an editorial revision, a misunderstanding at the time of proofreading or a common mistake. Chopin wrote the correct text in all three pupils' copies. The version of EE and GE2 are most probably revisions, introduced on the basis of comparison with analogous bar 15. category imprint: Differences between sources; Corrections & alterations issues: Annotations in teaching copies , Annotations in FED , Terzverschreibung error , GE revisions , Errors in the number of ledger lines , Errors of A , Annotations in FES , Annotations in FEJ |
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b. 83
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composition: Op. 21, Concerto in F minor, Mvt II
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In FE the minim in the 2nd half of the bar is an erroneous c1-d category imprint: Differences between sources issues: Annotations in teaching copies , Errors in FE , Annotations in FES |
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b. 83-84
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composition: Op. 21, Concerto in F minor, Mvt II
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The slur embracing in A bars 83-84 (with upbeat) was inaccurately reproduced in GE1 due to the transition into a new line. Both in FE (→EE) and GE2 the inaccuracy was removed, by adjusting the correct 1st part of the slur (in bars 82-83) to the erroneous slur in bar 84. category imprint: Differences between sources issues: Inaccuracies in GE , GE revisions , FE revisions |
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b. 83-90
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composition: Op. 21, Concerto in F minor, Mvt II
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The half-bar slurs in the editions – the first in bar 83 and both in bars 85 and 90 – are almost certainly a result of inaccuracy of the engraver of GE1, who apparently did not take the Chopin slurs too seriously, perhaps considering them to be written carelessly. category imprint: Differences between sources issues: Inaccuracies in GE , GE revisions |
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b. 83
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composition: Op. 21, Concerto in F minor, Mvt II
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Same as in analogous bar 15, the slur embracing the bass motif, added in GE1, most probably comes from Chopin. category imprint: Differences between sources issues: Authentic corrections of GE |
2-c3 in 
