Bluff 4-Bet (No-Limit Texas Hold’em)
What a bluff 4-bet is
A bluff 4-bet is the fourth raise in a sequence: open-raise, opponent 3-bets, and you 4-bet with a non-premium hand. You use psychological pressure and fold equity - the chance an opponent will fold - to win the pot without seeing a flop. Cold four-bet bluffs - 4-bets made without first investing in the pot (for example, you were not the original opener but 4-bet directly) - are rare and earn extra respect. That rarity contributes to their power.
When to attempt a bluff 4-bet
Target opponents who 3-bet very frequently, roughly over 20%. Frequent 3-bettors have wide ranges and cannot defend all hands correctly, increasing your fold equity. Prefer deeper effective stacks, generally at least around 55 big blinds, so the 4-bet meaningfully pressures opponents. Shallow stacks, under about 20 big blinds, remove leverage and make the move ineffective. Always check whether fold equity is high enough; if opponents fold about 64% of the time, a 4-bet bluff can be profitable even with any two cards. If a 3-bettor’s continuing range tightens to roughly 9% or lower, the bluff loses much of its profitability.
Sizing and execution
Size your 4-bet to about 2.3-2.7 times the opponent’s 3-bet. This range pressures the 3-bettor without turning the decision into an overbet that merely increases variance.
Execution steps:
- Confirm opponent profile: frequent 3-bettor and loose-aggressive tendencies.
- Confirm stacks: prefer effective stacks of at least 55 big blinds.
- Pick a coherent 4-bet size, roughly 2.3-2.7× the 3-bet.
- Plan for calls and shoves: be prepared to fold or to include some value 4-bets in your mix.
A cold 4-bet usually gets more respect, but it must remain consistent with your perceived range. If opponents start calling or 5-betting exploitatively, reduce frequency or adjust your hand mix.
Hand selection and blocker use
Choose hands that include strong blockers - cards that reduce the combinations of your opponent’s top hands. An ace blocker makes AA and AK less likely; a king blocker cuts some AK and KK combos. Blockers increase fold chances and often leave you with some equity when called. Good examples include A5s and KQs. A5s blocks AA/AK combos and still makes straights and flushes; KQs blocks AK/KK combos and plays well postflop. Prefer hands with backdoor equity that can improve on later streets if called.
Profitability limits and risks
Profitability depends on opponents folding enough. If the 3-bettor’s continuing range tightens substantially, near or under about 9%, the bluff becomes much less profitable. This play carries high variance: when called or met with a shove you can lose big pots, so keep frequency selective. Overusing the bluff reveals tendencies; good opponents will adjust by calling or 5-betting more, which erodes your edge. Mix in value 4-bets to balance your range and keep opponents guessing.
Checklist
- Opponent: frequent 3-bettor (>20%) or clear exploitable leak.
- Stacks: roughly ≥55 BB effective; avoid under ~20 BB.
- Hand: contains a key blocker (ace/king) and reasonable backdoor equity.
- Sizing: ≈2.3-2.7× the 3-bet; avoid gratuitous overbets.
- Frequency: keep it rare; stop if opponents call or 5-bet exploitatively.