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What is 3-Bet in Poker?

Direct Answer / Definition A 3-Bet is the third wager in a preflop betting sequence: the Big Blind is the 1st bet, the initial open-raise is the 2nd bet, and the re-raise is the 3-bet. 3-betting is an essential aggressive tool used to build pots with premium holdings, isolate weak openers, and deny equity.

What Does “3-Bet” Mean in Poker: Detailed Overview

In pre-solver poker, 3-betting was reserved almost exclusively for monsters (AA, KK, QQ, AK). In modern poker, balanced 3-betting ranges incorporate polarized bluffs (like suited wheel aces A2s-A5s and suited connectors) or linear ranges designed to dominate opponents.

Executing well-timed 3-bets forces the open-raiser into difficult decisions: fold and surrender their raise, call out of position with a capped range, or commit to a high-variance 4-bet.

Polarized vs Linear 3-Bet Range Construction

Linear (Merged) 3-betting: Used when you are in position against loose callers. You 3-bet a continuous band of strong hands (e.g. 99+, AJs+, KQs) that outperform the caller's continuing range.

Polarized 3-betting: Used primarily out of position from the Small Blind or Big Blind against late position openers. You 3-bet the absolute nuts (QQ+, AK) and high-equity bluff candidates with blockers (A5s-A2s, K9s), while flat-calling medium-strength hands.

  • Standard 3-bet sizing: In position = 3x the open raise; Out of position = 3.5x to 4x the open raise.
  • Use suited aces (A2s-A5s) as 3-bet bluffs: they block pocket Aces and retain nut flush/wheel equity.
  • Punish frequent late-position steals with aggressive 3-betting from the blinds.

Standard 3-Bet Sizings & Winrates

Standard sizing benchmarks across positional matchups:

In Position 3-Bet (e.g. BTN vs CO) 3x the open raise Facing 2.5bb open -> 3-bet to 7.5bb
Out of Position 3-Bet (e.g. SB vs BTN) 4x to 4.5x the open raise Facing 2.5bb open -> 3-bet to 10-11bb
Average 3-Bet Frequency (6-Max) 7.5% to 9.5% Balanced modern GTO benchmark
Hand Example

Practical Application: “3-Bet”

Scenario: Hero in Small Blind with A♠ 4♠. Cutoff opens to 2.5bb. Button folds.

Hero Hand: A♠ 4♠ (Small Blind) | Board: Preflop

Action: Hero 3-bets to 10.5bb out of position. Big Blind folds, Cutoff folds.

“A4s is a premier polarized 3-bet bluff candidate. It blocks pocket Aces, has wheel potential, and scoops 4bb in dead money without seeing a flop.”

Pro Tips from 3-Bet Lab

  1. Size up out of position: if you 3-bet too small from the blinds, opponents get attractive pot odds to call in position.
  2. Target high-fold-to-3-bet openers: if an opponent opens 30% and folds to 3-bets 75%, 3-bet bluff them relentlessly.
  3. Avoid 3-bet calling weak offsuit broadways: folding or 4-betting cleanly outperforms passive out-of-position calling.

Frequently Asked Questions (FAQ)

Why is it called a 3-bet instead of a 2-bet or re-raise?

Because the Big Blind is considered the 1st mandatory bet, the open-raise is the 2nd bet, and the re-raise is the 3rd bet in the sequence.

What hands should you use as 3-bet bluffs?

Suited wheel aces (A2s-A5s), suited broadways (KJs, QJs), and suited connectors (87s, 76s) that possess blockers and excellent postflop playability.

How do you respond when your 3-bet faces a 4-bet?

5-bet shove with your premium value (AA, KK, AK) and selective bluffs (like A5s), while folding marginal holdings.

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