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b. 1-2
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composition: Op. 28 No. 21, Prelude in B♭ major
..
In the main text we give the slur of FE (→EE), since the vast majority of subsequent slurs, present in a similar context, is led to the 1st quaver in the next bar in A – out of 13 slurs in b. 1-12 and 15, it is only the slurs in b. 1, 8 and 10 that end on the 6th quaver; two (in b. 6 and 9) are ambiguous. We consider all the above slurs to be inaccurate, since the differences in the range of slurs are not related to the structure of motifs, e.g. the shorter slurs in b. 1 and 8 are opposed by the longer ones in similar figures in b. 2 and 7. Moreover, in A one can see corrections – the slurs in b. 4-5 and 5-6 were being extended (in b. 3-4 probably too). Along with the crossed-out staccato dot at the beginning of b. 2, it may indicate that the concept of markings of those figures changed from category imprint: Differences between sources issues: Corrections in A , FE revisions , Omitted correction of an analogous place , Inaccuracies in FC |
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b. 1-4
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composition: Op. 28 No. 21, Prelude in B♭ major
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The sequences of dyads in the L.H., and further also in the R.H., were provided with a detailed fingering in EE. However, nothing indicates that it could be authentic. category imprint: Differences between sources issues: EE revisions |
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b. 1
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composition: Op. 28 No. 21, Prelude in B♭ major
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In the main text we include the staccato dot placed in A quite high above the 1st quaver; perhaps this is the reason it was overlooked in FE (→EE). On the basis of the preserved photograph, it is difficult to conclude whether the dot was copied in FC. According to us, it is likely that it is between the ledger lines, poorly legible due to the beam in b. 41, visible through the other page. category imprint: Graphic ambiguousness; Differences between sources issues: Errors in FE , Errors in GE |
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b. 1
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composition: Op. 28 No. 21, Prelude in B♭ major category imprint: Corrections & alterations; Source & stylistic information issues: Corrections in A , Deletions in A , Changes of tempo markings |
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b. 1
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composition: Op. 28 No. 21, Prelude in B♭ major category imprint: Corrections & alterations; Source & stylistic information issues: Corrections in A , Deletions in A , Changed phrase length |
1 to c1 in 
to 
. Consequently, the aforementioned shorter slurs would be uncorrected elements of the initial slurring.
