CAMBRIDGE—Daniil Trifonov's Celebrity Series debut at Longy on Friday came accompanied by impressive credentials: notable appearances, a clutch of competition successes—including first prize at the 2011 Tchaikovsky Competition. But more interesting than his résumé was how the 21-year-old Russian pianist revamped his program (at the last minute, necessitating a program insert) to emphasize his lineage. Pianists like cultivating genealogies of teachers and collaborators; Trifonov's recital was, partially, a splendid assertion of musical ancestry.
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