Do you call this river 340bbs deep?

Villain’s range is pretty much just the nut flush, possibly some second nuts as well. Only the biggest of punters is gonna snap donk bluff jam the naked ace this deep in a spot where you’re already pretty much repping a strong flush with such a large turn sizing. Regs are never bluffing the river here and neither are many fish

Turn sizing is a pretty big punt imo, I don’t know that we ever want to bet a straight OTT this deep to begin with unless we’re against a very clear whale. We prob only want to bet the strongest flushes for a 3/4 size. We could split into a smaller range too, like 1/4, but this deep it’s prob only flushes, and maybe some sets/2 pair since those have boat redraws. With a straight you’re just really too close to dead vs their continuing range. It might be better in theory, but in practice I think it’s pretty bad

Snap donk jam 200bb is a pretty big timing tell as well, river is a pure fold as played. There’s def a lot of nonsense on ignition, but I would assume much less so when you’re 300+bb deep

This kind of turn call river lead with these SPRs has a lot of nutted hands. The logic for this is that villain is sitting there facing your turnbet with the nuts and he’s like wtf do I do now? Jam is weird, small raise way too scary. Flat. Then I guess jam the river not to miss value.

Also what combos bluff can he have?

Don’t get carried away with your relative hand strength here. 43 js just napkins facing this action. No blockers at all to any value or SD value hands.

Ah ah, see below my only big pot lost today, in a sunrunning session. I thought "the straight is my best non-flush hand", which in hindsight was really stupid. I imagine they need to have bluffs, but this is very rarely a bluff at microstakes, I could retire with all the money I'd saved folding every time in this situation. If they have bluffs, straights are not the best hand for bluffcatching I think, I imagine we want to have a flush blocker card. In your case though I have a hard time imagining what hand you can have here, maybe KQd would be a nice one, or of course KJd. Or JJd.

€0.20 NL

Hero (CO): 152.9 BB
BTN: 121.2 BB
SB: 91 BB
BB: 101.5 BB
UTG: 100 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has A♥ Q♣

UTG raises to 2.5 BB, Hero raises to 7.5 BB, fold, fold, fold, UTG calls 5 BB

Flop: (16.5 BB, 2 players) T♠ 4♣ K♠
UTG checks, Hero bets 5.8 BB, UTG calls 5.8 BB

Turn: (28.1 BB, 2 players) J♦
UTG checks, Hero bets 28.1 BB, UTG calls 28.1 BB

River: (84.3 BB, 2 players) 7♠
UTG bets 58.6 BB and is all-in, Hero calls 58.6 BB

Hero shows A♥ Q♣ (Straight, Ace High)
UTG shows 5♠ A♠ (Flush, Ace High)

This is a very important insight.😉

And then you called a 3bet.

Don't open this hand from this position and definitely don't call a 3bet. It is losing you money.

I agree with everything you've said, I play mostly fast structure tourneys so I don't have a lot of experience 300+bbs deep. Coupled with it being at the end of a long session and having very little time to think about it I made a very bad decision on the river.

You think the turn is a pure check this deep? I suppose that makes sense. I was thinking his range had a lot of overpairs, many of which contain a diamond and I'd want to charge them. I guess that kind of thinking is a bit silly this deep though, if I get check raised on the turn it's completely gross. In hindsight my decisions were very much calibrated for a much shallower stack depth.
Thanks for the response.

Yeah I thought about this hand quite a lot after the fact and couldn't find any bluffs at all. 2 combos of thin value I can beat in jacks with a diamond. It was a complete punt calling off on the river.