Dresdner Bank's roving diplomat Hansgeorg Hofmann struggled for 18 months to keep Kleinwort Benson intact after its takeover by Dresdner. But rival board members in Frankfurt were forcing a tortuous management structure on fledgling investment bank Dresdner Kleinwort Benson. That led Kleinwort's long-standing chairman Simon Robertson to quit in February. Now the gloves are off, and Dresdner's board, including Hofmann, have turned authoritarian. Expect some bloodshed. By Laura Covill.