[Avodah] YT Sheini Vs. YT Rishon

[Marty Bluke]

R' Wolpoe asked:
<Anyone have more resources re: when YT sheini behaves diffrently than
YT Rishon?

Eating in the succah in the rain on the second night of succos. Do you
need to wait like the first night or not? I believe that this is a
machlokes acharonim.

I believe that in the Shiurim of RYBS on Succah there is an
explanation of the machlokes the Rambam and teh Rosh regarding the Yom
Tov sheni and pesulim.