Gemara:

Kiddushin,  Sanhedrin 

Halacha:

Yichud 

References: Kiddushin: 80b ,  Kiddushin: 81a ,  Kiddushin: 81b ,  Sanhedrin: 21b ,  Sanhedrin: 22a  

Description

Yeshivat Har Etzion: This shiur analyzes the nature of Yichud, highlighting how classic formulations of the basic question (is it formal or substantive) are often insufficient to explain the issues. It examines issues of Yichud with adopted children, in elevators, and other questions.