I'm running horribly those days and I though that, instead of complaining about it (which I just did ? ), I'd rather try to improve my game... Might be too optimistic but I guess running bad makes me doubt a bit and then, try to improve.

Anyway, I'd like to talk about a specific spot which happens quite often and many times I have trouble evaluating the best decision.

The spot is quite simple:
- You are CO. BTN is reg, lets say pretty straightforward. BB is a good reg and 3bet 8% in that position
- You open, BTN call, BB 3bet. You expect BB to 3bet a bit less vs two players IP than he would vs only one.
- You don't expect BTN to 4bet a lot... and, when he does, it would be mostly with bad AAXX. You don't expect BTN to fold neither.

Now, how to make the decision between folding/calling/4beting ?

I know it's hard to answer properly to that question without righting a novel... but any comment would be appreciated even if you just feel like talking about one specific type of hands or anything.

Well, it depends on how loose you open from the CO but generally speaking your hand would have to be pretty bad to fold to the 3-bet when you have position on BB. Obv you will have to factor in the BTN behind you who will always at least call if you also call. I personnaly open around 28 % from CO so basically I'm not raise folding any part of my range against a BB 3b.

If BTN decides to 4-bet and BB calls then fold hands that does badly against aces (mostly non-premium hands including an ace) and call with everything else.

Hands to 4-bet: Premium rundowns, premium kings and obv aces.

That's my 2 cents. Don't know if that answered your Q though?

It's helpful to get a point of view, yes.

Just, are you sure that, with your opening range, you can call profitably almost any hand ?
I might be wrong but I find it very hard to act "without position" postflop and I find myself in many difficult spots where, for example, I would be incline to shove against BB's range on a given flop, but could easily be almolst drawing dead against BTN shoving range etc...

Let's change a bit "the rules", and let's say BB is 100bb, you are 200bb, and BTN is 200bb deep. Do you still thing you can call almost all your opening range from CO ?

OMG my English sucks. Sorry guys

In the situation that you described you actually do have position on the PF 3better. Since BTN only flatcalled our opening raise he is most likely not superstrong, i mean ragdy aces is obv part of the BTN`s flatting/4b range but aside from that we dont need to be too worried about him preflop. Thus when the 3bet comes from the blinds and we are looking at a possible multiway pot with position on the 3better you can profitable call with the bigger part of your opening range. Unless you open like 50 % or w/e.
Had the 3bet instead come from the button then you need a stronger range to call, being OOP.

If you dont mind me asking what is your PFR from CO when folded to hero?

What you do postflop is obv an entirely different story as here you actually do have to think a lot about BTN acting behind you and you need to have connected more strongly with flop to call or raise than if the pot had been HU. But that`s just the way it is. Sometimes the initiative will benefit BB but sometimes it definetly won`t. BTN obv has the best spot here.
Had SB called in this situation with BB 3betting and you calling in CO he would actually have good relative position as he can choose to see what PF 3better and you and BTN does before deciding what to do himself.

28% given my tracker.

My understanding of this spot is a bit tighter than what hitmandk describes, although not by much. I agree with his general idea, but I think he underestimate the reverse implieds of "BTN reshoving", and having bad relative position postflop meaning we have to fold some marginal hands vs cbet we could have called/shoved otherwise. Also straight pot odds are a little worse in a squeeze spot, which makes it okay to fold a few hands imo.
I feel i'd open like 30-35%, and then fold like 20ish% to 3bet.

Of course if you know BTN rarely ever reshove and or you think you can play easily vs these villain postflop, then you don't need to fold much anything.