In his first of two BSO programs this season, frequent guest conductor Charles Dutoit marks the 80th birthday of Krzysztof Penderecki with performances of the great Polish composer's Concerto Grosso No. 1 for three cellos and orchestra. Dutoit, the work's dedicatee, led the premiere with the NHK Symphony Orchestra in 2001; for these BSO concerts he is joined by three of today's brightest cello soloists. Opening the program is Ravel's familiar Tombeau de Couperin, a colorful, multi-faceted work that originated as a piano suite. Edward Elgar's Enigma Variations is another work that explores a wide variety of moods and ideas, each of its movements sketching a portrait of one of Elgar's close friends.