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4-bet preflop in poker: value, blocker bluffs, and when to just call

The preflop 4-bet is your answer when an opponent reraises your open. Built well, it has two blocks: pure value hands you play for the whole stack, and a handful of bluffs chosen for their blocker cards. Between the two sits a grey zone where the best move is often to simply call. Here is how to decide.

What a 4-bet is actually for

A 4-bet is not just "a big raise with a big hand." It serves three purposes. First, it punishes 3-bets that are too wide: a player 3-betting 12-15% has a large chunk of their range made of hands that can't continue against a 4-bet. Second, it protects your premiums: always calling with AA or KK puts you in bloated pots out of position with a capped range. Third, it gives you the initiative — the 4-better is almost always the favorite for fold equity on later streets.

The context that matters most: your opponent's fold to 3-bet rate, their 3-bet frequency, and your relative position. A 4-bet bluff against someone who never folds their 3-bet is just a donation.

The value block: QQ+, AK, and sometimes less

Against an unknown or tight 3-better, your 4-bet value is limited to QQ+ and AK. These are the hands that keep decent equity even when called, and that don't mind seeing an opponent commit their stack.

Against a wide, aggressive 3-better — someone whose 3-bet rateyou've seen climb above 10% — you can widen: JJ, AQs, sometimes TT in position become a 4-bet for value and protection, because the range that calls you is much weaker. Conversely, never 4-bet AK "to see where you're at" against a nit 3-betting 3%: there, AK is a call.

The blocker 4-bet bluff

A good 4-bet bluff is not a random hand. It is a hand that blocks the combos your opponent continues with. The best candidates: A5s, A4s, A3s. They remove an ace from your hand, so mechanically a share of the opponent's AA, AK and AQ — the exact hands that 5-bet shove or call. As a bonus, they keep nut flush and straight potential when you get called and see a flop.

KQs and KJs can work out of position when your calling range is already loaded, but the backbone of the bluff is low suited aces. Frequency depends on the opponent: against someone who over-folds their 3-bet, you can 4-bet bluff generously; against someone who calls everything, you cut the bluffs to zero and 4-bet for value only.

When to just call the 3-bet

The grey zone: JJ-99, AQ, AJs, KQs, sometimes suited broadways and small pairs in position with depth. Calling instead of 4-betting makes sense in three cases.

Out of position, the logic flips: calling a 3-bet with AQ or JJ puts you in awkward spots on most flops. There, you often prefer to pick a lane — 4-bet or fold — rather than take it.

Sizing, without giving it away

In position, a 4-bet around 2.2 to 2.5 times the size of the 3-bet is enough: the threat of the stack does the rest. Out of position, go to 2.5-3x to discourage light calls and shrink your tricky postflop zone.

Two classic mistakes: the min-4-bet, which gives the 3-better an unbeatable price, and the giant 4-bet, which only isolates the hands that beat you. Keep sizing consistent between your value and your bluffs — otherwise an attentive opponent reads your hand from the size of your bet.

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