CO 3-Bet Pot Preflop Strategy

Overview

The cutoff (CO) is the second-to-last position to act preflop, offering a positional advantage over players in earlier seats but still vulnerable to the button and blinds. In a 3-bet pot—where the initial raise is met with a re-raise (the 3-bet)—CO's strategy must balance aggression and caution, leveraging position while respecting the strength of the 3-bet range.

As the 3-Bettor

When CO opens and faces a 3-bet from the blinds or button, the decision to call, fold, or 4-bet depends on stack sizes and opponent tendencies.

• Against a tight 3-bet range (e.g., from the small blind): CO should fold marginal holdings (e.g., suited connectors, small pairs) and call with strong but not premium hands (e.g., AJs, KQs, TT) to realize equity postflop. 4-bet with TT+, AQ+ for value and occasional bluffs (e.g., A5s) to balance.
• Against a loose 3-bet range: CO can defend wider, including suited broadways and medium pairs. 4-betting with value hands like JJ+ and AK, plus some suited aces as semi-bluffs, is standard.
• Position matters: out of position (vs. button) tighten calling ranges; in position (vs. blinds) can call more speculative hands.

As the Caller (Facing a 3-Bet from CO)

When CO opens and another player (e.g., button or blind) 3-bets, CO's response hinges on the raiser's range and effective stacks.

• Deep stacks (100BB+): call more frequently with hands that flop well (suited connectors, small pairs) to trap or outplay postflop. 4-bet with AA/KK/AKs for value, and a few bluffs (e.g., AJo, K9s) to discourage light 3-bets.
• Short stacks (≤50BB): prefer 4-bet or fold; avoid calling as it commits too much without positional advantage.
• Position: when in position (CO vs. blind), calling is more viable. When out of position (CO vs. button), tighten range and consider 4-betting more often.

Postflop Considerations

In 3-bet pots, the SPR (stack-to-pot ratio) is typically low (≈2-5). CO should:

• C-bet frequently when in position, especially on connected or high-card flops that favor the 3-bettor's range.
• Check back with marginal made hands or draws in position to control pot size.
• Float or raise against a blind's check only with strong draws or if opponent folds often to small bets.
• Against aggressive opponents, CO can check-raise as the caller with flush draws or middle pair to exploit fold equity.

Key Principles

• Position is power: CO can realize equity cheaply in 3-bet pots by seeing flops in position.
• Range polarization: in 3-bet pots, ranges are narrower; avoid over-calling with dominated hands.
• Adjust to opponent: vs. a passive player, call more; vs. an aggressive one, 4-bet lighter.
• Stack depth dictates: deeper stacks allow more speculative calls; shorter stacks force all-in decisions.

This strategy is foundational but must be adapted to exploitative play and table dynamics.