please note that Brahms composed a version for orchestra and a version for two pianos. Can you add the version to the file info?
Please, note that the genre of "Variations on a Theme by Haydn" is absolutely not a Synphonic Poem. The genre of it belong to the important tradition of the "Variations on a theme", as it can be noticed from the title. Brahms' music philosophie is completely far from program music and than from the genre of Synphonic Poem.