It is 5/10 NLHE that plays and feels like 2/5.

Villain (~$900) at BB (regular who has lost about $2k today).

Hero covers at BTN

History: Hero has been steal at BTN when folded to me. Have played 2 pots previously in BTN vs BB. Both time BB call steal will A high. One of the time where villain hit top pair (weak ace) he chose to check call my flop cbet and check down river

Preflop:
Hero (BTN) with K7s raises $35, BB calls.

Flop ($75): A74 two diamonds

Villain check, hero bets $45, villain raises to $115, hero raises to $300, Villain tank called.

Turn: 9 (non diamond)
Villain check, hero ???

Reason for my line:

Preflop: usual steal with K7s. I put villain on a wide range, like anything suited hand, connectors+.

Flop: usual cbet with middle pair. But when villain reraised, I do not think he has Ace pair becoz he would check call with it is previous hand history. Hence, I put him on draws and bluff.

Turn: given his range doesn't change much, I'm considering shoving turn to get him out of the hand in the event he has a slightly better pair than mine. Or to charge him if he is still drawing.

As for opening with K7 - seems fine if guy is gonna defend light

I probably would of just check this flop - and bet the turn personally but your play seems fine. His line seems full of **** - since he is repping a set or 2 pair which is unlikely since you block a 7 and I doubt he raises a bare Ace.

This spot is so villain dependent, it's gonna be tough in an online forum to analyze without knowing much about villain aside from what you provided. In my experience, if villain has a value hand he wants to go with, he either 4 bets the flop or stop and go's you and open ships turn if the draw bricks. Normally here, villain has a draw/combo draw that thinks you are never folding so is hoping for a check behind. But then again there are some villains who just click buttons without a plan for the hand, they checkraise flop with something like AQ or TT, and then when they get raised or called they get really uncomfortable and don't know what to do so they check.

If you are taking this line and villain checks turn, its def a ship to not give his draws a freebie. Hopefully he folds his pocket pairs, (pray he doesn't have 99 or 9xdd) and didn't decide to do something out of character with Ax. Honestly though with no other information to go on, i'm just going to fold to the xr until I have some history that says I usually have the best hand or usually can get folds from better. The thing that sucks about this spot is that you don't know his range AND you don't know how much fold equity you have vs. better hands. Playing for stacks with marginal hands and no information is Russian roulette. Its cool when you knock some guys head off with 3rd pair, but it sucks when you realize you just lost 90bb with 3rd pair and only a few outs.

Since guy is reg, do you know his tendencies when he's stuck? Some people play super tight as a response and others start opening up their ranges to try and get everything back. Would be nice if we knew this tendency.

We can consider checking back this flop because getting raised in this spot sucks but betting is fine.

As played just ship the turn I guess. Hard to believe he has a lot of Ax here but with the FD out there he could be inclined to raise with two pair+. He also probably perceives you as wide on the button which makes it less likely he'd be raising with value hands on flop as you cbet this board with most of your wide stealing range and often have air here.

is the Ace a diamond?

can't see V with drawing hands here - feels like A4, AQmin that needs to see a safe turn peel off to get the money in. Why would a pot control Ax guy shift to ck-r-call with draws? If he was getting frisky, it would be ck-r-shove anyway once you made it 300 assuming he spazzes draws and PC weak hands. I'd expect to see A4 a lot.. AQ might ck-f to a barrell, but you'd need a super wet turn to get that fold a lot once he put I in his ck-r-call on the flop.

Not putting in another dollar especially considering even his weakest draws have pretty good equity against Hero. You need folds nearly always for this to make money.