Q. Kvod Harav I wonder, since our Sages teach us that if someone wanted and decided to do a mitzva but by accident and situations beyond his control was unable to do it, the Torah considers it as been done, is it correct that one should try seriously to finish learning all Mishnayos for a fathers Yohrzait, even when he knows it is unlikely that he will be able to do so?
Horav Shlomo Miller’s Shlit’a opinion is that if he is truthful and with honesty plans to give his commitment a good and fair serious try, it can be done. This should be done clearly expressing that it is ‘Beli Neder” (without any oath or promise)
Rabbi A. Bartfeld as revised by Horav Shlomo Miller, Horav Dovid Pam, Horav Aharon Miller and Horav Chanoch Ehrentreu Shlit’a