Bluffing Fundamentals
Bluffing · updated 2026-03-08
Basics
| Factor |
Meaning |
| Board structure |
Who connects more often? What is the opponent's range? |
| Runouts |
Which cards improve your range or his range? |
Flop types by fold equity
| Type |
Examples |
Characteristics |
| Bad |
J97, T98, QJT |
Connected, both ranges hit hard |
| Neutral |
J97r, 345r, T95s |
Both ranges partially connect |
| Good |
A93r, K82r, Q64r |
Dry, preflop aggressor advantage |
Runouts
For preflop aggressor:
| Type |
Examples |
Action |
| Good |
Q/K/A, no completed draws |
Barrel |
| Neutral |
J+, weak draws |
Barrel selectively |
| Bad |
Completed straight/flush, paired board |
Give up |
For caller:
| Type |
Examples |
Action |
| Good |
Paired middle card, third to straight |
Lead, raise |
| Neutral |
Small overcards |
Attack sometimes |
| Bad |
A/K pairing top pair |
Give up initiative |
How opponent's range changes across streets
| Street |
What folds |
| Flop |
Air and marginal hands |
| Turn |
Remaining weak + some medium |
| River |
Medium hands, missed draws |
Opponent's range structure
- Air
- Weak (backdoors, small pairs)
- Medium (middle pairs, weak top pairs)
- Strong (top pairs with kicker)
- Nuts
- Draws
Barrel against 1–3. If few of them remain, no reason to continue.
Bluff math (0% equity)
| Sizing |
BE% |
Needed folds |
| 30% |
23% |
>23% |
| 50% |
33% |
>33% |
| 70% |
41% |
>41% |
| 120% |
55% |
>55% |
Conclusions
- Build bluffs based on ranges and structure, not on your specific hand.
- Calculate fold equity and BE%, especially on the river.
- Barrel if there is something to fold out.
- Do not bluff if opponent's range is strong or board is bad.
Common spot presets
1. RFI vs BB (SRP)
| Position |
Flop |
Turn |
River |
Comment |
| IP (CO/BTN) |
Bet 33–50% |
Bet 60–75% (on good runouts) |
Bet 30–70% (thin value/bluff) |
High fold equity on dry boards |
| OOP (UTG/MP) |
Bet 50% (best boards) |
Check → Bet 60–70% selectively |
Check/Bet 50% |
More checks on neutral boards |
2. SRP 3BP (IP vs OOP)
| Spot |
Flop |
Turn |
River |
Comment |
| IP (BTN vs BB 3bet) |
Bet 33% (entire range on Axx, Kxx) |
Bet 60–70% (continue pressure) |
Bet 50% / Jam polar |
IP has range advantage |
| OOP (BB vs BTN 3bet) |
Check → check-raise some draws |
Bet 60% on good cards |
Check/Bet 50% polar |
Vulnerable to barrels |
3. IP lines
| Line |
When to use |
Sizings |
| Bet–Bet–Bet |
On good boards, high FE + value |
50% → 70% → 50% |
| Bet–Check–Bet |
Turn is bad but river helps your range |
50% → x → 70% |
| Check–Bet–Bet |
Slowplay flop or pot control |
x → 70% → 50% |
4. OOP lines
| Line |
When to use |
Sizings |
| Bet–Bet–Check |
Strong on flop/turn, river worsens |
50% → 70% → x |
| Check–Call–Donk |
On runouts favoring OOP |
x → call → 75% |
| Check–Raise–Bet |
Strong draw/nuts on flop |
x/r 3x → 70% |
Mini-summary
- RFI vs BB SRP → IP bets small (33–50%), OOP more cautious, more checks.
- 3BP → IP applies pressure, OOP defends with checks and raises.
- IP lines → Polar strategy: Bet–Bet–Bet for pressure, Bet–Check–Bet for thin spots.
- OOP lines → Mix of donks, check-raises, and delayed bets.
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