Sergei Rachmaninoff – Serenade, Op. 3 No. 5. The composition is in the public domain (Sergei Rachmaninoff died in 1943). Piano solo arrangement, 6 pages, two staves, with chord symbols above the staff. Note: this score was produced with an AI-assisted transcription tool (PopPianoAI) from a piano recording, then formatted by the arranger. It is a playable arrangement, not an urtext edition — meter, ornaments and voicing may differ from the original score. Reference recording: "Serenade in b flat minor Op 3 No 5 - Sergei Rachmaninoff" (YouTube). The video is not by the arranger.