For players studying preflop dynamics, understanding the 4-bet is essential — and for quick access to practice tools and platforms, check out four bet login to get started.

In poker terminology, a “four-bet” refers to the third raise preflop: open, 3-bet (a raise of the opener), and then a 4-bet (a re-raise of the 3-bettor). Mastering four-betting is a crucial step from basic preflop awareness to a more advanced, exploitative and balanced strategy. This article explains when to four-bet, how to size, how ranges change by position and opponent type, and practical tips to integrate four-betting profitably into your game.

Why four-bet? There are two primary reasons. First, value: you hold a hand that is ahead of your opponent’s 3-betting range and you want to extract maximum value or isolate. Second, fold equity and leverage: by four-betting you can force marginal hands to fold and seize the initiative, often winning the pot preflop or simplifying postflop decisions. Additionally, well-timed four-bets as bluffs (4-bet light) pressure opponents holding big but vulnerable hands, like medium pocket pairs or broadway combinations that fare poorly against a polarized four-betting range.

Range construction is the backbone of modern four-bet strategy. There are three principal ways to structure a four-betting range: polarized, linear, and mixed. A polarized range contains very strong hands (value hands you always 4-bet) and bluffs (hands you four-bet to fold out equity-dominant hands), but not many medium-strength hands. A linear range consists mostly of the strongest part of your opening or 3-betting range — for example, when in position against a looser opponent who 3-bets light, you might 4-bet with a narrower, stronger selection. A mixed approach balances both philosophies based on opponent tendencies and stack sizes.

Position matters hugely. When you are in position (IP) and face a 3-bet, your four-bet range can be more exploitative: you can 4-bet with more bluffs because you will realize equity postflop with positional advantage. Out of position (OOP), you should be more cautious: many players lean toward a tighter, more value-heavy 4-bet strategy OOP because postflop play is more difficult if called. Against a late-position open followed by a 3-bet, a button or small blind four-bet dynamic differs significantly compared to early-position battles; always factor in who the opener and 3-bettor are.

Sizing the four-bet is a strategic tool. Typical modern sizing approaches are: small (2.2–2.6x the 3-bet), medium (2.7–3.5x), and large (4x+ or shove). Small sizes can preserve fold equity while keeping ranges wide and control pot size; they are popular online where stacks are deep. Larger sizes extract value from dominated hands and discourage multiway callers, especially effective in deeper-stacked cash games when you want to isolate the 3-bettor. Adjust sizes to the dynamics: if your opponents are prone to calling large 4-bets with weak hands, increase value sizing; if they fold too often, reduce sizing to widen your four-bet bluff frequency.

Four-betting light — using hands that are not pure value to re-raise as a bluff — is a powerful weapon but must be used with discipline. Good four-bet bluffs have blockers to the opponent’s strongest hands (for example, A♠K♣ when villain frequently holds A♣A♦ or A♣K♣ combinations), play well postflop if called, and are preferably suited or connected to maximize equity. Typical four-bet bluff candidates include combos like Axs (ace with suited), KQs, or occasionally lower suited broadways depending on positions and tendencies.

Exploitative adjustments by opponent type are essential. Versus tight players who 3-bet rarely and only with very strong hands, your 4-bet bluff frequency should be minimal; favor a value-heavy strategy with premium hands. Versus loose-aggressive 3-bettors, you can widen both value and bluff ranges because you will often be up against dominated hands. Against players who respond to aggression by shoving, widen your calling range with premium holdings and tighten four-bet bluffs. Noting how an opponent reacts to pressure — fold, call, or shove — will help calibrate your long-term four-bet strategy.

Stack depth changes the calculus. Deep stacks (100bb+) allow for more nuanced postflop play, making linear 4-bet strategies and smaller 4-bet sizes attractive because you preserve maneuverability. With shallow stacks (25–40bb), four-betting trends toward polarized all-in shoves: with effective stacks that shallow, many players simply 4-bet shove with a polarized range to maximize immediate fold equity and to avoid complex postflop decisions.

Multiway pots complicate four-betting decisions. Four-bets are most valuable in heads-up preflop situations. When a pot becomes three- or four-handed, the value of aggressive preflop re-raises diminishes because the likelihood of being called by multiple opponents with equity increases. Generally, avoid four-betting in multiway contexts unless you are reasonably sure you will isolate the action or hold very strong hands that play well multiway.

Postflop planning should be part of your four-bet strategy. If called, consider how the board textures favor your perceived range. A dry flop (K73 rainbow) often favors preflop aggressors, while coordinated, connected boards may give callers more equity. When you four-bet as a bluff and get called, be ready to fire on certain runouts but be willing to fold when action and texture clearly favor the caller. Good four-bet players think two streets ahead and define a continuation plan before committing chips.

Tools and practice accelerate learning. Use solvers and GTO software to study balanced four-bet frequencies and identify exploitable deviations. Range visualizers help you see combinations and blockers. Equally important is tracking real sessions: note how often opponents fold to four-bets, call light, or respond with aggression. These live data points allow you to switch from a GTO baseline to a profitable exploitable strategy tuned to your player pool.

Mental game and table image are underrated factors. A player known for frequent aggression may receive more calls to their four-bets, so sizing and frequency must compensate. Conversely, a tight image can allow you to four-bet lighter because opponents give you credit for strength and fold more often. Manage tilt and variance: four-betting increases short-term volatility, so ensure your bankroll can support the swings and your tilt control remains intact.

Practical exercises: 1) Build a 4-bet value and bluff range for each position and compare them to solver outputs. 2) Run simulated hands where you face different 3-bet frequencies and practice adjusting your 4-bet strategy. 3) Review hands where a four-bet was possible and ask whether the goal was value, fold equity, or pot control. 4) Track opponents’ responses and compute approximate fold-to-4-bet percentages to guide future decisions.

In summary, mastering the four-bet elevates your preflop game from reactive to proactive. Balance polarized and linear strategies depending on position and opponent tendencies, size with purpose, and always have a postflop plan. Combine theoretical study with practical table observations to refine when to value-bet, when to bluff, and when to simply call or fold. With disciplined implementation, a well-structured four-bet strategy becomes one of the most profitable and psychologically impactful tools in a serious poker player’s arsenal.