Navigating 4-Bet Pots Preflop: Shove or Fold?

Four-bet pots are where preflop aggression gets tested, and where a lot of players either freeze or spew. A four-bet is the re-raise over a three-bet: you opened, someone three-bet you, and now you raise again. Done well, it is a precise mix of premium value and carefully chosen bluffs that punishes a three-betting opponent. Done badly, it is either a value-only range that folds to any five-bet or an out-of-position spew that never gets there. This guide covers how the range is built, how the sizing tracks position and stack depth, and when the whole thing collapses into shove-or-fold.

What a 4-bet is fighting

The four-bet exists to answer three-bet pressure. If you open and only ever continue with your very best hands against a three-bet, a thinking opponent can three-bet you relentlessly, because you fold too often and stack off too rarely. The four-bet is how the opener fights back: it re-raises with value hands that want the money in, and it adds bluffs so the range is not so transparent that the opponent can simply fold to it and reload. If your own three-betting is not yet solid, start with 3-bet ranges 100bb cash, because a four-bet range is built as the answer to it.

The goal is balance. A four-bet range that is all value is exploitable by folding; a four-bet range that is all bluff is exploitable by five-bet jamming and calling. The solve keeps the ratio honest so that neither response beats you.

Value plus blockers, not value alone

A GTO four-bet range starts with the hands that want a big pot preflop: the premiums that are ahead of a three-betting range and happy to get it in. Then it adds bluffs, and the bluffs are not random. They are chosen for blockers and playability. Suited aces are the archetype: holding an ace removes combinations of aces and ace-king from the opponent's continuing range, so the four-bet gets through more often, and the suit means that when you are called you can still flop equity.

This is why "four-bet your good hands" is only half the strategy. Without bluffs, your four-bet is a billboard, and a good opponent folds everything but the nuts and never pays you off. The blocker bluffs are what make the value hands get paid, and choosing them for removal and playability rather than for feel is the difference between a four-bet range that profits and one that just gambles. The same blocker logic underpins mixed decisions across the whole range, covered in mixed strategies: one hand, two ways.

Sizing tracks position and stack depth

Four-bet sizing is not one number. In the Simple GTO cash trees at 100 big blinds, a four-bet is roughly 2.3 times the three-bet in position and about 2.75 times out of position. The out-of-position four-bettor sizes up on purpose: without position, you realize your equity worse and want to deny the three-bettor a cheap continue, so you charge more. In position you can size a little smaller, because position does some of that work for you. The general logic of why sizes move with the situation is laid out in preflop raise sizing.

Stack depth then reshapes the whole tree. Deep, at 200 big blinds, there is still room for a non-all-in five-bet, a re-raise that is not yet a jam. By 100 big blinds the five-bet in the cash trees is already all-in, because a four-bet has committed enough of the stack that the only re-raise left is everything. The sizing is not arbitrary: each number reflects how much of the effective stack the previous raise has already committed.

When it becomes shove-or-fold

The "shove or fold" in the title is not a slogan, it is what the math forces as stacks shorten. Once a four-bet puts a large fraction of the effective stack in, the four-bettor is committed, and any further raise is a jam. In the cash trees that point arrives well before most players expect: the five-bet is all-in by 100 big blinds, and by around 40 big blinds the four-bet itself is a shove, because raising to a non-all-in size would commit you anyway and hand the opponent a cheap look.

This is the practical heart of four-bet pots. Above roughly 100 big blinds there is genuine maneuvering room, four-bet sizes, five-bet sizes, and calls. Below it, the tree compresses fast toward all-in decisions, and trying to play a deep-stack four-bet game with a short stack just leaks chips. Knowing where your effective stack sits on that curve tells you whether you are navigating a real four-bet pot or simply choosing between jam and fold.

Facing a 4-bet with your 3-bet range

The other side of the spot is just as important: your three-betting range needs a plan for when it gets four-bet. That plan is a mix. The strongest hands five-bet, jamming at 100 big blinds and below or making the deep non-all-in five-bet when there is room. A slice of hands can continue by calling in position, where you can realize equity. The bluffs that have done their job by three-betting simply fold. A three-bet range with no answer to a four-bet is a range that folds too much, and observant opponents will four-bet you wider precisely to exploit it. The fix is to decide the response before you three-bet: know in advance which hands jam over a four-bet, which continue by calling in position, and which were always going to fold, so facing the re-raise is execution rather than an agonizing decision under pressure.

Where pools go wrong

• Value-only four-bets. The most common leak. Four-betting only premiums makes the range foldable, so it never gets paid and never applies real pressure.
• Under-sizing out of position. A small out-of-position four-bet lays a price the three-bettor is happy to take, defeating the point of denying equity.
• Deep-stack habits at short stacks. Trying to make a small four-bet when the stack is already committing depth just gives the opponent a cheap all-in decision.
• No plan versus a five-bet. Four-betting a bluff and then agonizing over the jam means the hand was not thought through before the chips went in.

The exploitative layer: read the three-bettor

The solved four-bet range is the baseline, and against a balanced opponent you play it straight. But four-bet pots are one of the highest-leverage places to deviate once you have a read, precisely because the pool three-bets so unevenly. The key is that you cannot deviate correctly without the baseline: the exploit is measured as a departure from the solved range, not a replacement for it, which is the whole argument in exploitative vs. GTO: when to leave the chart.

Against a player who three-bets too wide, especially a light, aggressive regular, you add value four-bets: hands that were flats or folds against a tight three-betting range become profitable four-bets for value because the opponent is continuing with too many worse hands. Against a nit who only three-bets premiums, you do the opposite: drop most of your bluff four-bets, because there is no fold equity against a range that never folds, and get your value in without inflating a pot you are behind in.

The mistake is to run one four-bet strategy against every opponent. A wide three-bettor and a premium-only three-bettor call for nearly opposite adjustments, and a player who four-bets the same way into both is leaving money on the table in both directions. The baseline tells you what balanced looks like; the read tells you which way, and how far, to lean off it.

How to study 4-bet pots

Four-bet pots reward drilling in layers, because the decisions come fast and the pots are large. First, learn your value four-bet range and its blocker bluffs from your most common seats, so the construction is automatic. Then attach the sizing, in position versus out of position, until you never default to a single number. Then internalize the stack-depth curve: know the depth at which the five-bet becomes all-in and the depth at which the four-bet itself is a shove, so you always know which game you are in. Finally, rehearse the response to a five-bet, so a four-bet bluff is a complete plan rather than a hand you fold under pressure.

The reason to own the solved trees is that four-bet pots are pure margins: the exact bluff combos, the exact sizes by position, and the exact depth where the tree collapses to all-in. Those margins are where the profit and the leaks live, and drilling them offline until the ranges and the commitment points are reflexive is how you play four-bet pots on a plan instead of a hunch.

Own the 4-bet trees

Four-betting well means knowing the value hands, the blocker bluffs, the position-dependent sizes, and the stack depth where it all turns into a shove. The Simple GTO Master Bundle carries the solved four-bet and five-bet trees across cash and tournaments, and the Cash Game Bundle covers them on the 500z rake structure with the in-position and out-of-position sizes baked in, as files you own and drill offline until the decisions are automatic.