Facing a 4-bet all-in: call or fold

Which hands are worth a whole stack?

Only the hands that hold up against a range built to be called by less. A 4-bet all-in is rarely a bluff at these stack depths, so you are looking at a tight, strong range, and to call you need a hand that has real equity against it. That means the top pairs and the strongest ace-king type holdings, and little else. Everything marginal folds, because calling off a stack as a coinflip or worse burns money over time even when it wins the occasional pot.

Why is this the spot beginners lose the most in?

Because the stakes per decision are maximal and the temptation is strong. A hand that felt great when you 3-bet with it, a good but not premium pair, still feels great facing the shove, and calling feels natural. But feeling strong and beating the shoving range are different things. The charts show exactly where the line sits, and the discipline to fold the hands just below it is worth more here than anywhere else.

How much of your 3-betting range calls?

Between 24% and 41%, with a mean of 32% across the nine spots. In raw terms that is 31 to 59 combinations out of the 1,326 in a deck, so about one hand in thirty is worth a stack here.

The figure is weighted by how often you 3-bet each hand to begin with, which matters in a spot like this: a hand you 3-bet a quarter of the time contributes a quarter as much to how often you actually face this decision.

Which hands are always a call?

Aces, kings and ace-king suited, in all nine spots without exception. Queens call in eight of the nine, ace-king offsuit in seven.

That is the whole reliable list. Everything below it is spot-dependent, and the gap between the hands that always call and the hands that sometimes call is the widest step anywhere in the preflop tree. There is no gradual slope here. Either the hand beats a range of monsters or it does not.

Why is folding correct so often?

Because a 4-bet all-in is the least bluffy action in poker. The player shoving has committed a stack into a pot you built by 3-betting, which means they expect to be called by strong hands and are content with that. Their range is dominated by the very top.

Against that, the usual comfort of "I have a good hand" stops applying. A pair of tens is a good hand in most spots and a losing call here. The correct instinct facing a 4-bet jam is that folding is the default and calling is the exception you have to earn.

How do you actually learn these?

Not by memorising every grid. The gap between knowing the right play on a page and finding it under a clock is where the money goes, and closing it is a matter of repetition. PlusEV deals these exact spots back to you and returns to the ones you keep getting wrong. The opening ranges these all branch from are in the chart library, and the positions guide explains why seat decides so much.