Reply To: When Did People Start Eating Shmura Maztos The Entire Pesach?

There are two kinds of Shamura of one is positive and the other is negative. Positively, we must watch the matzos from kneading so that it should be baked for matzos and negatively we have to watch the matzos from cutting that it should not become chametz. Tosefas in Betza 3:1 on the top of the page brings the Yerushalmi that on yom tov we are only allowed to work for food needs from kneading on. So therefore it follows that watching the matzos is also from kneading on. But if learn that yom tov you allowed to do work for food needs from cutting that the watching of the matzos would also be from cutting.