On Friday night, Pittsburgh Symphony Orchestra tried to keep up with pianist Helene Grimaud.

The orchestra lost.

So did Gershwin.

You know Gershwin, the nice, gregarious Jewish boy from Brooklyn who fused classical and jazz idioms before it was kosher in his “Rhapsody in Blue.” He also wrote a Piano Concerto, a more traditional, three-movement work for the ivories and orchestra.

The weekend’s guest soloist, French pianist Helene Grimaud, delivered a spirited yet polished take on the work, which bustles with percussion and the off-beat rhythmic patterns that call the roaring ’20s right to mind. She’s a frequent collaborator with the Pittsburgh Symphony, a lively touch at the piano and always a welcome presence.

The conductor for the weekend, Venezuelan-born Domingo Hindoyan, made his d

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