The worst flop for AA

You can expect villain knows this isn't a great board for AA or QQ. After you're flop check this is likely you don't have AK or KQ. That makes it a interesting board to bluff at. Lot of potential bad turn cards for trips and it needs protection.

I would most likely Cbet 1/3 pot here here and re-evaluate on further action for thin value and protection.

Now you need to call a bigger bet of the villain in this hand and you can expect you need to play for stacks if villain continues barreling.

River is tough to call a over bet shove without reads. Offcourse there are some missed draws and trips seems unlikely in villains range after the check on the turn.

Cheers,
SDK1987

Originally posted by Dr1fter808
vs Unknown villain, except that he is from the same country as I am

Does the villain know that this is the worst flop for AA, QQ, JJ?

Or does he straight up has the range which bets aggressively on flop like KQ, KJ, K9s, AK?

Well the flop I hate the most when holding QQ+ is something like 7♥:8♥:9♠: since it hits an opponents calling range so hard.
In any situation where I'm OOP and facing solid aggression vs a known passive or unknown opponent, I'll CBet any flop and take the fold.
If called, I'll check/fold the turn (unless the bet is extremely low), but if it is check/check I'll stab at the river.

This line is more or less OK and low stakes, but at NL 25 and higher it might not be.

CO has lot of brodway cards in open range. Call 3B he could have some KQ, KJs, KTs, JTs, ATs, AQ, TT. KK or AKs he could 4B.
After your check on the flop he tried to take pot with more less 100% pot bet.
Check on the turn - he has nothing or straight.
But after you 3x check he bet strongly to take pot - so again he has nothing or very strong hand.

With absolutely no information against the villain this makes it impossible to exploit anything on this hand.

You're just playing a guessing game by check calling and he could showdown anything. Even 23o. So..I can't really say what I would do here unless I was playing the session. It looks like you decided to go with your hand on the flop. I don't think most would bet full pot with KT, TT or Kx on that board. Even for protection. They might bet like 50% or 75% pot with those hands or even check behind.

When he checks the turn he could be checking KJ. Which is now the supernuts and needs zero protection hoping you'll fire the river but there are also a lot of bluffs in his range too. I would honestly just flip a coin in this situation. Heads, bluff catch, tails, fold the river. It's about that simple for me.

He's never doing this with a FD, SD or AT. Maybe would with a hand like QJs, hits J on turn and checks behind his marginal made hand hoping to improve on the river but willing to get stacks in on flop which is why he bet so much if he had it.

It also could be pure air an aggro player who just sees you check the flop signaling giving up. Sees you check turn AND river and decides to go broke on the bluff for value.

Did you call?

(ALSO..I think the 3 bet is too big with no information on the villain with such a strong hand I would only 3x it against the CO in the BB or maybe 3.5x at most. You never want them folding preflop and can easily get stacks in even with just a 3x 3bet preflop by betting around half pot all the way to the river on most boards. I would only go more than 4x against players with less than 20% fold to 3bet stat with Aces.)

Overbet usually means strong or nothing. I can't see what strong hands he'd call 3bet but check turn here (unless slowplaying) so probably a call from me

How often do you say you see a villain bluff off an entire stack? Good or bad player I'd say it's very very rare. Readless, im giving people credit with their bets, this seems like an easy fold to me??

3♣:3♠: obviously