Pianist’s CSO debut in Beethoven concerto spins spotlight in a mainly Mozart program

Review: For anyone who heard 34-year-old German pianist Martin Helmchen’s scintillating Chicago Symphony Orchestra debut June 9, the only question is surely this: When will the masterly pianist, a formidable presence in Europe since he won the Clara Haskil International Competition 15 years ago, return to Chicago not only to perform with the orchestra again but to play a recital in the Symphony Center Presents series?