I don't really like flop x/r as you can't rep too much. You should 3 bet your strong AA and 3 bet 99+. If you x/r, you're repping a narrow semibluff range of A9, AT, 9T, or some sort of gutshot broadway with flush draw or 78 etc.

I think your river bluff is very interesting and has a lot of merit. Although I think your hand is actually good here a very high % of the time, if you believe he will fold Ax to a x/r then I think this is very +EV bluff. Some people may think x/ring KQ in this spot is turning a hand with great showdown into a bluff but I think given your blocking potential which eliminates a lot of potentially strong combos from the villain, this x/r is pretty good.

You block KJ, QQ, AQ, AJ,. His range doesn't look like he has AA, 9x, TT b/c of his check back on turn. So if he decides you're bluffing, he might call with a worse Qx or Tx or even JJ. If he decides you're not bluffing, then he would have folded Ax anyways as there is almost no reason for you to turn Ax here into a bluff since it'll be a split pot a lot vs other Ax.

Thanks! I feel that most players wouldnt expect me to bluff here, or def not expect me to overbluff at least.

Really decent answer, don't know how we block AJ, but whatever :D

Flop xC and river xR both seem like the best play to me.

Why aren't you 3betting this pre though? I think it's mandatory assuming he is opening a standard button range.

At first sight I was like: wtf you raise river for value? :)) then I got it.
... as long as you think villain is capable of folding Ax or he could put you on a total air ball and call you with some worst Tx Qx this is a great play :)