Villain is new to the table. I've seen him raise preflop a few times. BB is the spot. 7 handed. 2/3 blind structure.

I limp KK23 UTG

Villain calls next in. BB checks. 3 to flop 3.66 sb, let's round to 3.5.

A 5 is exposed when a card flips up during the folding round.

Flop is 45J

I bet, both call

Turn is 5 (3.25 BB)

I bet, only villain calls.

River is 9 (5.25 BB)

I bet, villain raises. I'm getting 8.25 to 1

I would call.

What would flash through my mind is, "Could Villain have slow played aces before the flop, trip jacks on the flop, or trip fives after the turn?" Since all of these are possible, it's reasonable that Villain has our two pairs, kings over fives, beat. But I would call in case Villain doesn't have one of those hands.

Buzz

What limit are you playing at and what are the demographics of the Villian?

Against the average player in my game (most often 20/40), I would almost certainly call.

I'm skeptical that bare Aces are raising the river for value here, there are a ton of draw that Villain could have that missed, and if he had the last five or flopped a set, he would proably have been better off raising the turn to charge the low draws.

15/30 45 year old white dude

Same thoughts as buzz, rough aces. I believe you have a crying call, but you just know you are beat. Also, could have A,2 or 3 w/ 99. Tough spot. I hate those situations where you know you are beat but cant stop your hand from putting in the call.

Could have made a hand like Jacks and 9's, thinking your overpair two pair is now counterfeited. Could also just be bluffing a missed heart draw on a pretty dry board.

Does the typical middle-age player actually raise the river here with bare AA?
If not, there are ton more missed draws than value hands. Even if opponent only bluffs the missed draws like 5% of the time, it's still a pretty clear call.

Huh?

Yes, the first part of that makes no sense in retrospect lol. Disregard.

perfect hand to raise pre. I call river.

I'm raising pre flop and I insta call the river he's only repping 99/59 and most 5s should raise you on the turn. Could easily be air

I'm generally one of the stronger advocates of limping, but this hand needs to be raised pre. OTR you both have missed SO often - it's a super-easy call.

Raise preflop, call river.

Pre is never as easy as "raise pre". Construction of player types and their position is so important.

As a default I'd raise kk23ds but there are a lot of tables where I would limp for various reasons.

What are the reasons if you don't mind to share? TIA.

if there is no chance your raise will reduce the field to 2 or 3 players

I'm in the early stages of learning flo8, not sure why we're limping there on the river. The bet on the river is a value bet? Are there enough worse hands calling? Maybe a x/c on the river would be better, saves us a bet if we're beat.

experienced players know that when draws (especially low draws) miss, players will try to steal the pot. they will therefore also make calls in such situations with a lot of hands that have anything resembling showdown value. therefore players should try to value bet "wide" against such players with the knowledge that they will likely get called by almost anything with showdown value.

don't forget as well, this is fixed limit, so the final bet on the river to a potential caller is small compared to the size of the pot. this entices calls from a lot of hands that would not elicit a call in a pot limit or no limit hand.

therefore kings is definitely a bet, and a call of a raise against competent/experienced/aggressive players.

and that's without seeing the 5 being exposed preflop.