Yevamot 9: How Rape Can Affect Yibum

Disturbing daf: Warning - discussion of rape. The question if the strange case of a wife who is raped by her father-in-law, which yields all kinds of complications for those who accept the possibility of the case (as compared to the Tanna who basically calls the question itself idiotic). Plus, a discussion of why there are 15 cases in the opening mishnah instead of 16 cases. Also, charts are needed for amud bet. Where the yibum becomes complicated with regard to the various possible cases - or are they prohibited? 6 cases leave the woman permitted to one brother, but not another - again, connected via the rape of the mother, not marriage. Plus additional interpretations of the same case. And the challenges of this particular daf....