For the source text click/tap here: Sukkah 7
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Partitions... where should they be placed? What is the appropriate shape of a sukka? Should it be rectangular, like an alleyway? If there is the measure of an expansive handbreadth at the end of one wall, in which direction should that partial-wall face? Does it count as a third wall? And what about a doorway; could that count as a third wall?
Our daf discusses a Sukkah that has two complete walls that are perpendicular to each other and the third wall is a tefach, and the question is where the third wall should be placed. Rav maintains that the third wall should be placed adjacent to the end of any of the walls. Rav Kahana and Rav Assi asked Rav: Let him erect the third wall corresponding to the head of a diagonal line?
The fact that the third wall of a sukkah may be comprised of a single tefach is due to a הלכה le Moshe mi’Sinai—a Torah law from Sinai that is not scripturally based, yet traced back to Moshe Rabeinu, passed down through the generations.
We look at the various possibilities and diagrams of such structures which leads us back to the dazzling 2010 NYC competition...