: Eight months have passed without follow-up comment, and I've now heard this "arrangement" of the Allegro de Concert for myself.  "Concerto No. 3" isn't just a fabricated chimera:  the first movement is an augmentation and restructuring of Chopin's music.  As Kogosowski's composition and not Chopin's, it's just one of hundreds of paraphrases based on or inspired by Chopin.  This isn't the place to list all of them, and an exception shouldn't be made for one.