But the piece has a profound champion in Alisa Weilerstein, the soloist this week. She is an artist who adroitly channels fierce work with her penetrating, brilliant sound — her performances of works by Kodaly and Shostakovich provide ample proof — and she made a compelling case for the Prokofiev. She dispatched every technical test with astonishing ease and visceral joy, and took obvious pleasure in the music’s often sardonic humor.