4 seifim in the Shulchan Aruch of the Mechaber, with the Rema's gloss, introduced by הגה, on seifim א and ב, and a cross-reference in parentheses at the end of seif ד; 4 also in the Shulchan Aruch HaRav, under its own numbering. May two neighbours who have not made an eruv together use, on Shabbos, a place that touches both their domains — a cistern, a well, ruins, a privy? The siman answers, among other things, according to whether a partition or a beam separates the domains in the water, according to the vessels with which one draws, according to whether the use is only by way of the air, through windows, and according to whether the place is far from the walls and houses or close to them.
LEVEL 01
A pedagogic introduction: Hebrew text of the Mechaber and the Rema's glosses, the first entries of the Mishnah Berurah, a clear English rendering, key concepts unpacked, practical cases and a summary.
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Deep pilpul: Gemara sources, shittos of the Rishonim and Acharonim, foundational chakiros, classic machlokesim, and practical nafka minah.
📖 StudyLEVEL 03
A master-level synthesis: central axiom, hierarchy of concepts, decision trees, mnemonics, pitfalls to avoid, and a summary chart.
📖 StudyLEVEL 04
The Shulchan Aruch HaRav of the Alter Rebbe on this siman: 4 seifim.
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