WQXR's Beethoven Piano Sonata Marathon, which took place in The Greene Space on Nov. 20, 2011 featured a lineup which spanned a range of personalities and national schools. It included the flamboyant individualists Evan Shinners and Timothy Andres; the Russian powerhouses Daria Rabotkina and Natasha Paremski; and the Chinese up-and-comers Qi Xu and Yuchong Wu. Some, including Jeremy Denk, Jonathan Biss and Alessio Bax, are already boldface names on the international concert circuit; others are on their way.