ベートーヴェンのピアノソナタ32番

The third variation has a powerful, stomping, dance-like character with falling
32-part notes, and with heavy syncopation. Mitsuko Uchida has remarked that
this variation, to a modern ear, has a striking resemblance to cheerful
boogie-woogie, and the closeness of it to jazz and ragtime, which were still
eighty years into the future at the time, has often been pointed out.

Jeremy Denk, for example, describes the second movement using terms
like "proto-jazz" and "boogie-woogie".

(Wikipedia)

要するに、第３変奏はリズムも３２分の１２拍子となり、装飾も含め
ほとんどスイングジャズであって、ジャズの発祥から８０年も
先んじているとのこと。　　　

出典：英語版ウィキペディア