Sergei Rachmaninoff – Prelude, Op. 23 No. 6. The composition is in the public domain (Sergei Rachmaninoff died in 1943). Piano solo arrangement, 5 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: "Rachmaninoff - Prelude in E flat Major, Op. 23 No. 6" (YouTube). The video is not by the arranger.