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. 22, Polonaise
The flat restoring b
2 at the beginning of the last triplet does not appear in any of the sources. It seems that it was believed that the 
before b3 four semiquavers earlier was not a cautionary accidental only and that it was also valid in the case of the discussed note. The same in b. 252.
Compare the passage in the sources »
category imprint: Interpretations within context; Editorial revisions
issues: Inaccuracies in FE, Omissions to cancel alteration, Errors repeated in GE, Errors repeated in EE
notation: Pitch