Quickly review the “גמרא דף יב: “איתביה יתר על כן (middle of the Amud) until “אמר רב יהודה”
Conclusion of Sugya: Amount of walls needed to create a Reshus Hayachid
The Gemara asks a question from the machlokes Rebbe Yehuda and the Rabanan in regards to two mechitzos on the two sides of a Reshus Harabim.
What is the question and the answer of the Gemara?
Review תוס’ “איתיביה
List the three different explanations () in the question of the Gemara and the Nafka Mina between them in Hilchos Mechitzos
Rashi,
Tosfos
Ritva
https://hebrewbooks.org/pdfpager.aspx?req=37287&st=&pgnum=20
Question:
According to the conclusion of the Gemara, how many mechitzas are required to create a Reshus Hayachid?
Learn רא”ש סוכה פרק א ס’ ט
https://hebrewbooks.org/pdfpager.aspx?req=14319&st=&pgnum=469
Learn רמב”ם ה’ שבת פרק י”ז הלכה ט
https://hebrewbooks.org/pdfpager.aspx?req=14278&st=&pgnum=73
According to many Rishonim only three walls are required to create a Reshus Hayachid, and can be accomplished with two full walls and a lechi. Do the two full walls need to be parallel or perpendicular or doesn’t matter?
Learn ביאור הלכה ס’ שס”ג, א “אסרו חכמים
https://hebrewbooks.org/pdfpager.aspx?req=60389&st=&pgnum=55
See the חזון איש note on this ביאור הלכה
Major Question:
The Gemara seems to say clearly that only three walls are necessary to create a Reshus Hayachid. How does the Rambam who rules that four walls are required learn our gemara?
Learn רבינו חננאל on the side of the Gemara for a different way to explain our gemara.
Major Question on ר”ח and Rambam:
In the answer of the Gemara having three walls and a lechi is considered a Reshus Hayachid. But according to Rava לחי is a היכר why is this Mavui considered a Reshus Hayachid?
Why does ר”ח say the tikun on the third side is a door? Why not a Tzuras hapesach?
See דברי יחזקאל ס’ ה אות יב
https://hebrewbooks.org/pdfpager.aspx?req=14038&st=&pgnum=55
https://hebrewbooks.org/pdfpager.aspx?req=14038&st=&pgnum=56
Continue learning the the “גמרא דף יב: ” אמר רב יהודה אמר רב מבוי (2/3 down the Amud) until the bottom of the Amud
Learn תוס’ “להוי
Learn תוס’ “ובתים