Reply To: Stealing the Afikomon

You are very machmir in kazeisim, so you would know the shiyur for Bentching on bread whenever you eat! When youmake kiddush every shabbos you need a reviis. True today we have many shaylos, as you mention a bubble in the matza, but in times of Sedei CHemed, people made their own matza, examined them and settled all their question before pessach. Likewise they made their own wine and knew how much water to add during the process. In any event, that is what the Sedei CHemed writes (he is a melaket, so it is from a sefer he collected from).

There are other answers why Chazal werenot gozer by pessach shechal b’shabbos not to eat matza (morror or daled kosos), but here is notthe ofrum.

In brief, al pi Kabbala and nistar, Shabbos accomplishes whatever shofer and lulov does, therefore when ROsh Hashana is on shabbos, the drawing of malchus is accomplished by the Shabbos Malkasa, hence there is no need for shofar, and since a michshal can happen of shema yaverena, CHazal abolished the mitzva assay of shofar, sinc it is unneccessary. Same by lulov. However, shabbos cannot accomplish the hamshocha of matza etc therefore Chazal did not abolish these mitzvos when pessach is on shabbos.