If Shakespeare's Macbeth is already bloodthirsty, dark, barbaric, ferocious, atavistic and telluric, Verdi's operatic reworking of this work not only keeps intact the strength of the original but, by concentrating and essentialising it, he even increases it. Verdi's Macbeth is the ultimate party of wickedness and an orgy of moral perversion. Stylistically, it is a rare opera that does not fit anywhere – chronologically it should be inscribed in late bel canto, but...