Select: 
Category
All
Graphic ambiguousness
Interpretations within context
Differences between sources
Editorial revisions
Corrections & alterations
Source & stylistic information
Pitch
All
Pitch
Rhythm
Slurs
Articulation, Accents, Hairpins
Verbal indications
Pedalling
Fingering
Ornaments
Shorthand & other
Importance
All
Important
Main


Pitch

b. 18

composition: Op. 28 No. 10, Prelude in C♯ minor

f in A (probable interpretation→FEEE)

g in FC (→GE)

..

The bottom note of the semiquaver chord was written in A imprecisely, as a result of which it is uncertain whether Chopin meant f or g. According to us, the note is to be interpreted as f, since it covers the full width of the line – cf. a similarly placed f note a line higher, on the 2nd beat of b. 12. Fontana, as a professional musician, could have been influenced by a similar chord two bars earlier.

category imprint: Graphic ambiguousness; Differences between sources

issues: Inaccurate note pitch in A