Prokofiev - Piano Sonata No. 7 in B flat major, Op. 83 - Sviatoslav Richter

Prokofiev had Richter play the premier of this piece.   There's a widespread claim that he learned it in four days.  Richter's supernatural memory is famous, not only for music but for other things as well.  His playing is the highest level, he's one of the few pianists who you can't imagine possibly being better than he was.