What is the Shar'i ruling regarding a husband who divorced his wife three times on separate occasions, and what are the implications of the conflicting fatwas concerning the validity of their marriage?

The exhaustion of three divorces (talaqat) makes the wife unlawful for her husband. If the consecutive pronouncements of divorce were intended as an affirmation of the first, then it counts as one divorce. If, however, affirmation was not intended, then it counts as three divorces. In this case, the wife becomes irrevocably divorced (Bainunah Kubra), and she is not lawful for her husband until she marries another man, consummates the marriage with him, he then divorces her, and her 'iddah (waiting period) expires. Divorce pronounced during a period of purity (tuhr) in which sexual intercourse has occurred is valid according to the consensus of the four madhhabs (schools of thought) and the majority of the early and later generations of scholars, though it is preferable to postpone the divorce until the next period of purity. Scholars have differed regarding the innovativeness (bid'iyyah) of combining three divorces in a single session. Divorce pronounced during menstruation is valid, despite being contrary to the Sunnah, as indicated by the story of Ibn 'Umar, may Allah be pleased with him.