What do you think your opponent had in this situation? I do not play nl50, but I suppose people call AK, JJ, KK and AA ip sometimes, but they probably fold hands like QT, or 33.

I do not have enough knowledge to comment if your play was actually right or not, but I am curious about how you perceive villain´s range.

Pretty much the opposite of that range haha

Jj Ak+ should all 4b get it in and QTs flat. My 3b strategy is about 10% of my range here so he can flat quite wide in position

Sounds reasonable. I agree they SHOULD 4-bet with jj and ak, but I do not know if they actually do that in NL50. QTs makes sense.

should 4b 100% at 50nl so I discount that for the most part.

Very strange spot. I'd have a hard time folding here because most opponents will be somewhat capped after checking back the flop + he's bound to be 4betting AK, JJ, KK+ with some frequency and shouldn't have all of those hands in his range. At the same time betting the As on the turn with bluffs also makes more sense than checking them back with the intention to raise the river. I think it's fairly close but I slightly prefer calling vs. unknown.