Villain is is a tight nit, VPIP 15, PFR 10, 3Bet 0, AG 8 over 79 hands.

I admit... I am personally very proud of that fold on the River. I had to fight every fiber of my body NOT to call that shove with that Overpair - and turn it into a bluffchaser. Since Villain is a nit with 0 3bet, I put SB into a tight range to call from SB: AA-22, high suited connectors (QJ to 76), Broadwalks, suited Aces.

I tried my best to delimit his range on the River, however. This is a big issue that I have, having only a few seconds to make a decision under the gun: It is hard for me to put Villain into a clear range before time is up.

By the River, before the shove, here is the range I had him on:

AA-QQ, TT, 77, 66, 44, AQx, QTx, 98x, and clubs suited Aces.

On Equilab:

Board: 6sQc7c4hTd
Equity Win Tie
CO 15.91% 15.15% 0.76% { KhKs }
SB 84.09% 83.33% 0.76% { QQ+, TT, 77-66, 44, QTs, 98s, 76s, AcKc, AcQc, AcJc, AcTc, Ac9c, Ac8c, Ac7c, Ac6c, Ac5c, Ac4c, Ac3c, Ac2c, QTo, 98o, 76o }

Pot odds on the River was 26% - 2,79-to-1.

Describe villain as "Nit" and then give a range where 76o, 98o, and other ridiculous **** is included. You should go into a hand matrix tool and see what 15% is. Then add in that he's in the small blind if you have reason to believe he's aware of what position is.

Don't fold river.

Equilab, VPIP 15: 77+, A7s+, K9s+, QTs+, JTs, ATo+, KTo+, QJo

Even nits aren't flatting AA from SB with 2 players already in pot. With stats you give on villain and the fact he donk/called flop then donked turn I think he's on exclusively 66/77 and maybe AQ if you're lucky.

Looks fine to me, aside from the range assessment.

I would be pretty wary of a nitty reg's lead otf, but they're literally never shoving with a worse hand otr. I guess micro stakes nits might tend to over-value top pair hands, but the really alarming thing is that villain led into you ott when you raised the flop.

Another thing that confused me was that he had a Postflop Aggression Factor of 8.0, despite his low VPIP and PFR. Yes, it is only over 79 hands, but still.

I was trying to figure out with he could be shoving with that I could beat (except AQ). A busted flush draw for bluff, maybe?

Nittier VPIP/PFR stats often actually lead to higher postflop AF I believe because they're playing with a stronger range

nonsense

shove turn