” I hesitate to tie down his shitta, since I did not hear it from him directly. “
That is ok, my rav did. And of the thousands of his talmidim, there is only one, Rav Meiselman, who thinks that The Rav didn’t really mean it when he said he wanted gemara to be available to women.
And The Rav *personally* taught gemara to women so there is no question that he thought this was not a theoretical matter.
‘Can you please bring Talmudic sources for this psak of Rav Soloveichik Zt”l that communities are obligated to teach women Gemora?’
No. He never wrote a halachic tshuvah on this. (He rarely wrote a halachic tshuvah on anything; one of the few things for which we have a written halachic opinion from The Rav is an endorsement of co-ed schools.
” [If you are allowed to question Rash”i’s opinion, we may definitely question Rav Soloveichik’s.”
Certainly! Many have done so and continue to do so, and not just in the Charedi world. For example, Rav Aviner in Israel forbids women being taught gemara. (I’m not aware of any non-Charedi rabbis in America who do.) But Rav Soloveitchik is a legitimate gedol and my rav — and the rabbis of my community — are entitled to follow him.
” Also, since the Rishonim have not stated such an obligation, shouldn’t this psak be considered another one of your examples of arguing with rishonim?]”
Absolutely. As I pointed out, poskim — especially Ashkenazic poskim — can and do argue on rishonim even when there is no rishon to back them up.