Surely Bach’s French Suites, which he composed during his years at Cöthen (1717–1723), are among the finest inducements to practise that any teacher has ever made to a pupil. In this case Bach wrote them for his young wife, Anna Magdalena. The over…

She is a piano legend, he has collaborated as a soloist with all leading conductors and orchestras around the world. Now Martha Argerich and Guy Braunstein come to the Pierre Boulez Saal with their first-ever duo program—an artistic encounter that…