Complex sentence: Amy Cheney made her professional debut in Boston in a recital in 1883, playing Chopin's Rondo in E-flat, but a more notable concert was as piano soloist in Moscheles's piano concerto No.3 in G minor with the Boston Symphony Orchestra.
Split into simpler sentences: Amy Cheney made her professional debut in Boston in a recital in 1883, playing Chopin's Rondo in E-flat. In another concert she was piano soloist in Moscheles's piano concerto No.3 in G minor with the Boston Symphony Orchestra.