Been playing against Villain for about 1.5 hours. No history. He's been limp/calling PF with a ton of hands - suited and off suit connectors, any Aces, most Kings, most Queens, etc. When he raises PF it seems he has solid raising hands. He comes along on the flop with any pair or any draw it seems. Haven't seen him call any big bets or get into any big pots. The table is full of players betting $15-$20 every street no matter how big the pot is, so no real read on what happens with bigger bets or bigger pots with him. He seems to call down with top or second pair as long as the bets aren't that large. Effective stacks are $200.

Hero is in the BB with two black Kings. Villain limps UTG +1 followed by two other loose passive limpers. I raise out of the BB to $20. Villain calls, other two limpers fold. Pot is about $45.

Flop comes down 9h 5c 2s. I lead out $30, Villian quickly calls. Pot is about $100.

Turn makes the board 9h 5c 2s Qs. These are the spots I'm not sure what line to take against wider rangers. I don't know how he plays big pots and what he's willing to stack off with, I'm OOP, and betting the turn of any decent size gets into pot commitment territory. Without more knowledge is it best to check here and see what he does, or is it better to just keep on value betting and building a big pot with the overpair? Thanks for your thoughts and feedback!!

When you have a lot of uncertainty about your opponent's range, think instead about how you want to structure your own ranges. Here, the Q is clearly a better card for your range than for his, which generally means you want an aggressive strategy where you bet with both value hands and some bluffs.

How often you should bluff is complicated and depends on what street it is, what your chances are of improving your bluff, etc etc, but if you bluff about 30% of your hands you will not usually be far wrong. Bluff a bit more with a large bet size and a bit less with a small bet size. If you think about your value range here, starting from the strongest hands, you have 3 combos of QQ, 3 combos of 99, 6 combos of AA which are stronger than KK. That's 12 combos overall. There are 16 combos just of AK available as bluffs if you want them. The conclusion is that you easily have enough bluffs available to balance out including KK in your betting range. If you reason like this, it is not going to matter how he plays against you, you'll be indifferent.

If you imagine being Villain here with like T9 and I bet 2/3 pot on the turn and say to you "look, here's the deal. I'm betting 99/QQ+/AQ here, but I'm also betting all my AK" you can see that it's not obvious what to do. None of your options feel great.

Chris's post is very good. I will add few other things:

1. So think about what type of hands your opponent would "quickly call" the flop with on that board. My thoughts are, it is pretty dry with the exception of 43 as a draw (and given your descrip, that could be in his range). However, "quick" calls mean that V didn't think that much about what to do. To me that means one pair-ish type of hands that have some SD value. It lowers the possibility of sets or 2 pair hands because V would at least take a few seconds to consider raising. So, I think his most likely holdings here are 9x and pairs like 88-66. Doubt he calls with random overcards on this board.

2. So, when the Qs comes, that doesn't help his range really at all (with the possible exception of Q9). Therefore, you have a clear bet for value here IMO, and the real key is sizing. I would bet $75 or $80 here to build a pot as this board looks like a good "bet 3 streets for value" candidate to me. If V raises this turn, then we can re-evaluate.

Don't be afraid to bet/fold at these levels. It is a key skill to being a good NL player. Close to 95% of V's at this level will let you know when you are beat, so bet for value until they tell you otherwise especially on ragged boards like this.

Thanks for the replies and thoughts everyone!! I'd see him calling here with other draws, such as A3, A4, 67, 78, 46. Also though he certainly has a fair number of top pair hands in his range, he as a comparable mix that give him other pieces of the board too. I'm not disagreeing about betting for value, but is $75 to $80 too much? I haven't seen him call any bets this size, so is he calling that size bet with 56, or pocket 77's, or A2, etc.? I'm not sure, so the sizing for value on the turn was the real question for me.

Board is pretty dry. $45 turn/shove river works for me.