Answer: fminor

AnswerCrossword Clue
FMINOR

Key of Chopin's Piano Concerto no. 2

FMINOR

Key of Haydn's "La Passione"

FMINOR

Key of Beethoven's "Appassionata"

FMINOR
Key of Beethoven's "Appassionata" Sonata
FMINOR
Key of Chopin's Piano Concerto No. 2
FMINORKey of Brahms's Piano Sonata No. 3
FMINORChopin's "Ballade in ..."
FMINORKey with four flats
FMINORRelative of A-flat major
FMINORKey of Chopin's "Piano Concerto No. 2"
FMINORScale-book scale
FMINORBeethoven's "Appassionata" is in it