Small set seems the most likely to me.

Fold river, he's not bluffing and he's not value betting worse.

River's definitely a fold, and I agree that a very good player's never betting into us here unless he views us as a passive station. The reason is that our range raising the turn is going to be too strong for this to be a good bluff spot, but betting anything for value's still awful since our river betting range is going to be larger than our river calling range. However, when people do make such a non-sensical bet in a big pot like this against a really strong range, it almost always turns out to be because they hit the queen in some way, and then got excited and bet before they really had a chance to think about it. I'd say he has like 10% bluff here, 5% A9, 10% really weirdly played small set, and 75% AQ or QQ.

BTW, I'd pop the flop here up to 5400 here, and I think the people saying turn raise is bad just misread the suits.

lol i dunno why i said raising turn was bad... probably didnt see double fd.

you love level at poker foruns saying ''nobody has nothing''. come on, its PLO, its very common both players has big hands on turn.

Isn't this a very safe river to stuff if were the villain and we miss i'd like to think if he has a set he's gonna jam the turn. the textured bricked out to where a set is nutty and it's very hard for any hand to call a jam