Barreling is how aggression compounds. A single c-bet on the flop wins the pot about half the time. A c-bet followed by a turn bet (two-barrel) wins the pot another large percentage of the remaining half. A three-barrel that also bets the river picks up most of what is left.
The math: if your flop c-bet folds out 55 percent of opponents, your turn barrel folds out another 40 percent of who is left, and your river bet folds out another 30 percent of who is left, you take down the pot:
total_fold_rate = 1 - (0.45 0.60 0.70) = 1 - 0.189 = 81.1%
Even with a trash hand, if you can three-barrel consistently and your opponent folds at these rates, you win 81 percent of the pots you contest. That is a huge number.
When to barrel:
- Scare cards on the turn. The turn brings an overcard, a flush card, or a straight card. Your range is credible; theirs gets weaker. Barrel.
- Dry flop, wet turn. Flop was K-7-2 rainbow and the turn brings a heart, putting two hearts on board. Flush draws are now live, and any pair is under pressure. Barrel.
- Opponent profile: tight-passive opponents fold to second barrels constantly. High fold equity means bluffs are profitable.
When NOT to barrel:
- Calling station opponent. Barrels do not work. They call with weak pairs and ace-high.
- Flop missed your range too. If your opponent is paying attention, they know your c-bet range does not hit a paired board any more than theirs does. Barreling into a skeptical opponent is just burning chips.
- Out of position on a wet turn. You are betting first without the chance to see their reaction. Better to check-call with equity, check-raise with strong hands.
The three-barrel bluff:
A three-barrel bluff is the most advanced bluffing line. You bet flop, bet turn, bet river, representing a very strong range. To pull this off credibly, your hand range has to include enough value hands that the triple-barrel is believable. If you only triple-barrel bluffs, opponents call you down with one pair. Balance is the whole game here.
Open Poker strategy template parameter:
The `barrel_frequency` parameter per street in the strategy templates controls how often your bot follows through on aggression. The Shark template uses barrel_frequency of 0.40 on the turn and 0.20 on the river. Dialing it up increases aggression; dialing it down means you give up on bluffs more often.