100 BB effective stacks.

Pre-flop: Folds to hero with QsTh on Button. Raise to $30. Villain calls in BB

Flop: 6h8h9c. Check, check

Turn: Qc. Hero bets $45. Villain calls.

River: 5d. Villain leads $200

Is this a snap fold or do we have to call here sometimes because of the busted flush?

There's really not much info here to go off. He's leading for an overbet of pot and 1 card to the straight arrived. I'm more prone to just believe their betsize and fold TPNK. We also have a Th blocker to some flush draws and high straight/pair peels, and we'll show up with better hands or spots to defend if they make this a habit.

Pretty much agree here.

Have I had some fish donkbet missed draws? Yes. I only know because I tilt called, so it's definitely a thing. Do I think it's hurting my bottom line overfolding? No. Is it hurting my bottom line paying these off when they hit? Probably yes.

Just because there was a busted flush draw should never be a reason to call in general but he's making a bet that usually represents a big hand so just fold.

Any info on villain? If he has 7x why is he over betting? What does he expect you to call with? On the turn he check called? If he did check/call the turn I would say he's more likely to have the straight - he could have some 9x/8x which will have a fair amount of 97/87, and those hands would check call the turn. I think he bets flush draws on the turn so that eliminates those, as well as low equity hands. I still though can't get over why he'd bet so big on the river - hard for you to have much here. I would fold as played but live info can convince me otherwise.

Board isn't good for your range, but I feel it's a mandatory bet with your hand on the flop.

I fold river.

This is very read dependent. If villain is capable of pulling this line as a bluff, especially a reg/pro type, then I think you are going to have to find some hands to call here with that aren't straights. If villain is more of a rec and you haven't seen him do overbet bluffs then I would overfold this spot a ton. Without info I tend to overfold to river overbets like this.

You should be able to have some 7x you bet on the turn as a bluff which is now a straight, right? Th isn't a great card to have because you block hearts with a T which are double gutted and might choose to bluff. You do block JT and T7 - seems like you would have heard from those hands by now though.

If you were going to make a hero call here I think maybe hands like, Q9, Q8s and Q6s that you should have on the button that block Q7, 97, 87 and 76. Having hearts or clubs in your hand I suppose is bad, particularly Ac or Ah, although those do block combos of Ac7c and Ah7h too.

Solver is just mixing here with all bluff catchers, calling your hand about 38% of the time. Two pair hands it is calling a little more, like 55%.

So I think in general I would really just overfold this spot. It would take a lot of convincing for me to think someone was overbluffing in this spot for me to worry about being exploited here. And you don't have to call that often to protect yourself from being exploited.

Disagree about flop - having to bet/fold this is a disaster, and a good villain can really punish us if we're betting textures like this at a high frequency

You have an OESFD, who's folding vs reraise?

No flush draw but yeh didn't realize we have the double gutter.

I would also probably bet this flop a decent amount (although not always, fine to check also I think). We do have to bet some straight draws and this double-gutter (one to the nuts) with two overs seems like a good option. We don't have to bet/fold it.

How’s our bottom line doing when we jam?

This board is good to bet big and check. From the button we can have all the sets, two pair, T7s, 75s, but so can BB. We should take a hand like this and and mix check and bet call, not bet fold.

No hearts = bet 75% and call 50% pot raise.

With 1 heart = bet 75% and call 100% pot raise.

With the heart it is more likely our straight outs are good, plus we have backdoor equity and a bluff candidate on heart runouts.