Op. 2, Variations in B♭ major
Op. 10, 12 Etudes
Op. 11, Concerto in E minor
Op. 21, Concerto in F minor
Op. 22, Polonaise in E♭ major
Op. 24, 4 Mazurkas
Op. 25, 12 Etudes
Op. 26, 2 Polonaises
Op. 27, 2 Nocturnes
Op. 28, 24 Preludes
Op. 30, 4 Mazurkas
Op. 35, Sonata in B♭ minor
Op. 50, 3 Mazurkas
Op. 63, 3 Mazurkas
Op. 64, 3 Waltzes
(Op. 4), Sonata in C minor
WN 17, Polonaise in B♭ major
None of the sources has the 
lowering a1 into a1. In JC and EF, in which the first two demisemiquaver groups in this bar are written with the use of an octave sign (overseen in JC); however, one cannot even talk about an inaccuracy here, as the before the note of this pitch is already in the 2nd group of demisemiquavers.
Compare the passage in the sources »
category imprint: Interpretations within context
issues: Accidentals in different octaves, Omission of current key accidentals
notation: Pitch
