Starting with historical context. Gershwin's "Summertime" is iconic, so it's important to mention that. Then, why did Fazil Say choose to do variations on it? Maybe because he's influenced by jazz and classical, aligning with Gershwin's style. Then, when was the piece written? I'll need to find the composition date. I recall that Say is active in the 2000s, so maybe around 2000s to 2010s.
Musical characteristics: harmonic language. Say uses jazz and classical elements. Maybe some improvisational elements in the variations? Also, rhythmic aspects—syncopation, perhaps. How does he modulate the theme? What technical aspects for the pianist, like hand independence or complex rhythmic patterns?
Structure of the variations would be next. Variations usually follow a theme and variations form. How many variations are there? Maybe 12 or 15? I should check the actual structure. Some composers number their variations, others don't. Let's suppose it's 10 variations for simplicity, but need to verify.
Comparisons with other works: Other variations on "Summertime" by composers like Rachmaninoff or Einaudi. How does Say's approach differ? Maybe more contemporary jazz influence versus classical.
Educational value: Who is the piece intended for? Intermediate to advanced pianists. It could be used in exams or recitals. What skills does it develop? Technique, phrasing, emotional expression.
Availability of the PDF: Where can people find the sheet music? Maybe on the composer's official website or sheet music platforms like IMSLP or Hal Leonard.
I should also consider mentioning if there are any notable recordings of the piece. Maybe Fazil Say himself has performed or recorded it. That would add value to the feature as a performance resource.