On Wednesday, after Mr. Gergiev began with Rodion Shchedrin’s short, riotously playful Concerto for Orchestra No. 1 (“Naughty Limericks”), the Russian virtuoso Denis Matsuev, 39, was the soloist in Tchaikovsky’s Piano Concerto No. 2 in G. Mr. Matsuev boasts a prodigious technique and interpretive flair. He is built like a weight lifter and plays with muscularity and power. His sound can be steely and harsh, especially his crash-bang dispatching of fortissimo chords. ...