HERO FOLD RIVER??

I am insta calling this. His lane makes absolutely no sense. 44, 55, QJ should raise the turn for value and protection by most competent players.

You beat the rest unless he floated you with something retarded like KT.

Well it's a tough, because we are betting for value. Personally I would bet bigger OTR. I think we can find a nitty fold, because villain is unknown and the raise is huge. Actually we have a lot of better hands to call with: QQ,JJ,55,44,KTs,KTo,T8s,QJs,QJo.
It's really rare to see bluff here, especially when we did a triple barrel OOP, imo it will be mainly nuts (sometimes some random spews).
Make a note and move on.

What did you do and why?

I'd also find a tight fold - to me his line looks pretty strong OTR as we know river raises are the nuts veeeeeeery often ♦

I agree with Sunrise1912 that his line doesn't make alot of sense, but anyway, on this limit I think the call will not be profitable because we will run into weird played KT, QJ and sets more often than not.

Flop is a check/call, This is the worst Qx you have probably, we need some Qx in our checking range.

Turn you're also vbetting too light.

River, due to your small sizings you made it possible for him to end up with KT aswell, triple float, huge river raise is rarely a bluff, you beat 0 of his value, i'd fold.

If this is vs a comfirmed fish things might change a bit. But 10hands is too small to say anything.

The best line you mean c/c flop and c/c turn (or bet if no bets OTF)?

FLOP = We dont have 3streets of value => WE CHECK FLOP.

I agree with with check/calling the flop, we need hands like this in our checking range.

On the turn I think we can bet bigger.

You can definitely mix in a bet some of the time with the hand, that's no big deal although probably more so when you go smaller with half pot you should lean towards a check. Especially since I'd assume like most ppl at the limit you'll play your A3 etc. as a bet here.
Yeah not having 3 streets of value has merit, but so does having some more TP mixes in bet check line, especially if you cbet a lot more than optimal like everyone does at the limit

Turn's interesting, even at NL400 I probably cbet more than optimal with hands like backdoor hearts etc. even throw in some backdoor blocking AhKx etc. so I'd go with 2/3 sizing as I picked draws and still have a bunch of strong hands on the turn and with that the Q9 is just a check.

Bu you know what, Snowie with it's tight cbet strat actually uses 50% and with that you do actually bet most combos of Q9 now, interesting. It works because then it will throw a blockbet on cards like this one with 90% of range including the TPNK it bet and then call off a hand like this happily

River I'd just fold, and bet either smaller or much bigger this bet feels weird to me

I would fold river too.