I was listening to Pandora, and a piano piece by Chopin came on titled

Nocturne for piano in C sharp minor (doubtful), KK Anh.IA/6

And I simply am wondering why is the key doubtful? Is that what's "doubtful" about the piece or am I missing something? I would think Chopin knows what key he's writing in, no?

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1 Answer 1


The work appears in the Chomiński's catalogue of Chopin. It is the authorship that is doubtful. Often such works are called spurious rather than doubtful.

The score is here.

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