his operatic repertoire included more than 90 roles which he interpreted with his rich voice and his dramatic strength. his most successful creation is considered to be that of "boris godunov", from the modest mussorgsky's opera of the same name. right next to it is the role of dosifey, from the opera "khovanschina" of the same composer. by many music historians and critics he is regarded as the greatest ever boris godunov, right after feodor chaliapin.