At DY ok let me make it clear: the Rebbe is the Frierdiker Rebbe’s successor, who is the successor of the Rebbe Rashab, who is of the Rebbe Maharash who is of the Tzemach Tzedek who is of the Mitteler Rebbe who is of the Alter Rebbe aka Baal HaTanya who is of the Mezritcher Maggid who is of the Baal Shem Tov who is of Achiya HaShiloni and R Adam Baal Shem who is of R Yoel Baal Shem who is of R Eliyahu Baal Shem….
So says Chabad doctrine. Many others claim the Rebbe (and some say even the Frierdike Rebbe) made unacceptable changes. Al zeh gufo anu danin.