7th hand at the table. No one knows me b/c I have never played at said casino before. This is the first hand that I have been in though (folded pre until now)
UTG ($600) opens to $20, folds around to hero in SB, looks down at Ad Kx, flats, BB flats.

UTG is a young black guy. He seems to be playing reasonably. I would tend to give him some credit because he seemed to be friends with the BB and the BB was talking about a different hand where a guy flatted with AK instead of 3 betting it. And he was like "no 3 bet." In conclusion, the guy's friend seems to have some background in poker.

Flop K63 two diamonds
ck ck, bet 45 into 55, call, fold

Turn: offsuit Q
ck ck

River: ($145) offsuit blank, forget what card
Hero?

100. Fake swallow to induce

Why'd you check the turn?

At this point, I'd probably bet like 55 hoping he'll raise me with a missed FD or SD... I don't expect 100 to be raised often... Or just go ahead and pot it. Bet 150. And hope he thinks you missed and calls you with a low pair...

Not betting here is massive, massive leak.

I don't mind turn check but as played not getting 2 streets of value is a crime. The whole point to NOT 3 betting ak pre is to get value in spots like this. So pretty much 100 and hope for a call. I honestly don't understand the point to this hand, I am just going to assume that he had kq and you get coolered. The whole point to slow playing is to make more money in spots where villian is not drawing very live at the cost of losing a bigger pot when villian hits said miracle. If you can not embrace the variance 3-bet pre or don't play poker. This hand is pretty straightforward and plays itself, no need to get into overthinking here. FWIW I am folding to river cr given history (none).

With the c/c, c line that u took, he has to consider draws in your range. All draws missed. So, I would lead the river big to look bluffy and be more likely to get called by less than top pair. With him raising utg, I think there has to be 77-JJ and AQ in his range that may look u up.

I think this is the quintessential 2-streets of value type situation. I think turn check is fine if you thought he was aggressive and always barrel diamonds and frequently barrel air on scare cards. Otherwise a lead might have been better.

As played you have two options. Option #1 is to bet 60% pot to get value from Qx, 77-JJ. Option #2 is to c/r. Against a good player who would vbet thin I would c/r as he is always betting 99-JJ, Qx after we check, and almost always calling the c/r since we 'rep nothing'. He is also sometimes bluffing missed diamonds. Against a typical 2-5 player option #1 is better, as they don't bet this river enough.

I'm fine with checking turn, but only because I plan to bet this river when he checks it back. Now, I bet about 2/3 - 3/4 of the pot, looking to rep a missed diamond draw. Something like $100 feels about right here. Given the action, I don't see how he could fold a Q here. There's no reason for him to have a Kx hand given the action. It would be hard for him to fold 77-JJ.

If we check, I'd expect him to value bet his Qx hands, but I'm not sure that we can count on most players to stick another bet in here with a 77-JJ hand that has just seen a second over card hit.

re: 2 streets of value- what worse hands do you think we are getting value from? We are hoping that KJs is in his under the gun opening range? It was 10 handed so not so sure we can even say that KJs is in his range. As far as Kings, wouldn't you think just KQs + is his pf range?

Trying to make it look like a bluff doesn't seem like a bad plan. In doing that, we will look like KQ, too.

How about a c/c line, just hoping that he is the type to blalubet.

Pretty clear river vbet. I'd bet 75ish