(Photo: Jean Louis Fernandez) From October 13 to 25, the Lyon Opera House staged Modest Mussorgsky’s big opera “Boris Godunov.” An opera of Shakespearean proportions, the murder tsar resembles Richard III, with the added burden of a guilty conscience and, in spirit, certain historical operas such as Verdi’s “Don Carlo” or Meyerbeer’s. Its strength lies largely in the interplay of {…}