4-Betting

Detailed Explanation

A 4-bet is the fourth aggressive action in a betting sequence within a single poker hand. The progression works as follows: the initial raiser opens the pot (the first bet), an opponent makes a 3-bet (the first re-raise), and then another player—or the original raiser—makes a 4-bet (a re-raise of the 3-bet). This action represents a significant escalation of aggression and typically commits a substantial portion of a player's stack, particularly in No-Limit Hold'em games.

The terminology can initially seem confusing because the first voluntary bet is actually counted as the "1-bet," the big blind is sometimes considered the actual first bet preflop, making the open raise technically a "2-bet," and the first re-raise becomes the "3-bet." Despite this technicality, the poker community universally refers to the first re-raise as a 3-bet and the subsequent re-raise as a 4-bet.

4-betting is predominantly a preflop action, though it can occur postflop in highly aggressive games. The decision to 4-bet carries significant strategic weight because it typically indicates either a premium hand (such as QQ+, AK) or represents a sophisticated bluff designed to exploit opponents who 3-bet too frequently. The sizing of a 4-bet matters considerably: it must be large enough to deny proper pot odds for speculative hands but not so large that it commits the player to calling a potential 5-bet shove with marginal holdings.

Practical Examples

Example 1: Value 4-Bet
In a $2/$5 cash game with $500 effective stacks, a player in middle position opens to $15. You're on the button with pocket Aces and 3-bet to $50. The middle position player 4-bets to $140. This is a classic value 4-bet, representing a premium hand like KK+ or AK. The sizing is approximately 2.8x the 3-bet, which is standard for value 4-bets.

Example 2: Light 4-Bet Bluff
You're playing $1/$2 with $200 stacks. A loose-aggressive player in the cutoff raises to $7, and you 3-bet from the small blind to $24 with A♠5♠. The cutoff, who you know 3-bets frequently, 4-bets to $65. This could be a light 4-bet bluff designed to exploit your perceived 3-bet range. The cutoff recognizes that you'll have many bluffs and marginal hands in your 3-betting range and applies maximum pressure.

Example 3: 4-Bet Pot Playing In Position
In a tournament with blinds at 100/200, the under-the-gun player raises to 500. You have A♣K♦ on the button and 3-bet to 1,400. The UTG player 4-bets to 3,200. You call, creating a 4-bet pot. The flop comes K♠9♥2♦. Your opponent continuation bets 2,000 into the 6,800 pot. This scenario demonstrates how 4-bet pots play differently—with higher stack-to-pot ratios eliminated, the action typically proceeds more straightforwardly postflop.

Strategic Considerations

Optimal 4-Bet Sizing: Generally, cash game 4-bets should be approximately 2.2-2.5x the 3-bet size when in position, and 2.5-3x when out of position. In tournaments, these sizes can be compressed due to shorter effective stack depths. The goal is to make the 3-bettor indifferent with their marginal holdings while maintaining the ability to fold to a 5-bet shove when you're bluffing.

Constructing a Balanced 4-Bet Range: From a GTO perspective, your 4-bet range should include both value hands and bluffs. A common framework suggests a ratio of approximately 2:1 or 3:1 value-to-bluff ratio, though this varies significantly based on position, opponent tendencies, and stack depths. Value hands typically include QQ+, AK, while bluff candidates often include suited Aces and Kings with blocker effects (A5s-A2s, K5s-K2s) that reduce the combinations of premium hands your opponent can hold.

Positional Dynamics: 4-betting in position provides significant advantages. You'll have more information on postflop streets, can control pot size more effectively, and have better bluff opportunities. Conversely, 4-betting out of position requires a tighter, more value-heavy range because you'll be navigating difficult postflop situations without positional advantage.

Stack Depth Considerations: Effective stack size dramatically impacts 4-bet strategy. With 30-50 big blind stacks (common in tournaments), 4-betting becomes more polarized—you're essentially committing to get all-in. With deeper stacks (100+ big blinds), you have more room for a merged 4-bet range that includes medium-strength hands like JJ or AQ that can realize equity postflop.

Opponent Tendencies: Exploitative 4-bet strategies require careful observation. Against opponents who 3-bet frequently but fold often to 4-bets, increase your 4-bet bluffing frequency. Against players with high 3-bet/fold stats but who never fold to 4-bets, eliminate bluffs entirely and 4-bet only premium value hands. Understanding your opponent's 5-bet range is equally critical—if they never 5-bet bluff, you can 4-bet bluff with near impunity.

Common Misconceptions

Misconception 1: "4-bets always represent Aces or Kings"
Many intermediate players assume all 4-bets are ultra-premium hands. In reality, strong regulars incorporate substantial bluffing frequencies into their 4-bet ranges. Against aggressive 3-bettors, bluff 4-betting is a necessary adjustment. Failing to recognize this leads to overfolding quality hands like AK or JJ to 4-bets.

Misconception 2: "You must call or fold to a 4-bet—5-betting is only for Aces"
While 5-bet bluffing is advanced and less common, it exists in balanced strategies, particularly against opponents who 4-bet too frequently. Additionally, hands like Kings can often 5-bet for value, and Ace-King sometimes warrants 5-bet shoving depending on stack depths and opponent tendencies.

Misconception 3: "4-bet sizing doesn't matter much"
Sizing is crucial. Oversized 4-bets (4x+ the 3-bet) commit you to too much of your stack, making it difficult to fold to 5-bets even with bluffs. Undersized 4-bets (less than 2x) give opponents correct odds to continue with too many hands, failing to accomplish the 4-bet's goal of narrowing ranges and applying maximum pressure.

Misconception 4: "Postflop play in 4-bet pots is the same as other pots"
4-bet pots play distinctly differently because stack-to-pot ratios are much lower. Continuation betting frequencies are higher, pot geometry changes dramatically, and implied odds are severely reduced. Players often make mistakes by attempting elaborate multi-street bluffs when stack depths make such plays impractical.