Quote:
Originally Posted by jdr0317
So it's rather simple: don't cap your range before there's even a flop on the table.
It's far more complex than that.
For starters, getting pummeled postflop often happens when you divide your range "horizontally," that is, you have 88+ ATs+ AJo+ and a 7-high flop comes and you either have an overpair or overcards and now someone with like 76 crush you if you do anything 100%. Even a 9-high flop is problematic because you can't have top pair outkicked so T9 can breathe easy.
As the example range suggests, raising from EP suffers the same problem. Why don't we limp our entire range? Not a trick question - for starters, we don't always get 3-bet, and also because we lose value from the top of our range.
So it's not simple, you're balancing the value of having a wider range postflop with the immediate value you're sacrificing preflop.
Let's say you're in the BB and someone raises, and it's folded to you. It makes a huge difference whether the raiser is EP (you're losing value from only a thin sliver of your continuing range and the Villain suffers from a horizontally-segregated range), or whether the raiser is OTB (you're now losing value for a large part of your continuing range and Villain is not horizontally segregated). It's a pretty easy case to say you should just call the former, a lot harder to make the case for the latter.
In particular, keep in mind the times where the aggressor behind you is extremely loose. Take the extreme example - he 3-bets a lot hands you would not open. You're now justified in 4-betting your entire opening range for value and you don't narrow your range at all. Worse yet, if these Villains have a wide re-reraising range (e.g., he opens BTN 80%, you 3-bet BB 40%, he 4-bets 40%, you're sacrificing not one bet but two bets preflop.
The most common scenario is that you open, get 3-bet IP, and the blinds fold. And basically, unless Villain is super wide, you're going to simply call the 3-bet. But there's a variety of other scenarios, e.g., big blind defense, you open LP and get 3-bet out of the SB, where the answer is not simple at all and you should think about what you're doing.
If you think it's close and you're going to play with Villain again, you can always opt to slice your range vertically rather than horizontally. For example, instead of 4-betting all KK or calling with all KK, call black KK and red KK but 4-bet all the mixed color KKs (breaks down 1/3-2/3). Now your range isn't (as) stratified. But to confuse your opponent, you need to play long enough for him to notice sometimes you re-raise KK and sometimes you don't.