CO 200bb 3-Bet Jam

Definition and Context

The "CO 200bb 3-Bet Jam" refers to a specific poker action: a player in the cutoff (CO) position, holding a stack of 200 big blinds (deep stacked), elects to re-raise (3-bet) an opponent's open-raise by moving all-in (jamming). This move is typically preflop and is a high-risk, high-reward play often seen in both cash games and tournaments with deep stacks.

Key Components

• CO (Cutoff): The position to the right of the dealer button. It is a late position, offering good information and leverage over earlier raisers.
• 200bb: Indicates a deep stack of 200 big blinds. Deep stacks allow for more post-flop play but also increase the potential loss if jamming is unsuccessful.
• 3-Bet: A re-raise after an initial raise (the open). A 3-bet jam means the re-raise is an all-in, not a standard size.
• Jam: Slang for moving all-in.

Strategy Considerations

A 200bb 3-bet jam is an extreme polarization tactic. The jamming range is typically split into two types of hands:

1. Premium Holdings: Hands like AA, KK, or sometimes AKs/QQ that want to get called by weaker hands but also deny equity to drawing hands. With 200bb, even premium hands rarely jam because they prefer to build a pot or induce action.
2. Bluffs: Speculative hands (e.g., suited connectors, small pairs) that have poor playability post-flop due to stack depth but high fold equity preflop. The bluff jam is designed to make the opener fold a wide range, including many hands that dominate the bluffer.

However, jamming 200bb preflop is unconventional. Typical 3-bet sizes with deep stacks are around 9-12bb to preserve stack-to-pot ratios for post-flop play. A 200bb jam is a "polarized" shove that forces the opponent to make a difficult decision for their entire stack, effectively turning the hand into a single-bet all-in, eliminating skill advantage.

When is it Used?

• Exploiting Weak Opens: Against an open-raiser with a wide range who might fold too often to a huge shove.
• Short-Handed or Heads-Up: Deeper stacks in full-ring games often call wider, making the move riskier.
• Tournament Spots: Where ICM considerations may make opponents more risk-averse, increasing fold equity.

Typical Hand Ranges (Example)

• Value Jam: {AA, KK} only, maybe AKs if opponent calls loosely. But most strong hands prefer smaller 3-bets.
• Bluff Jam: Hands like 65s, 87s, or A2s-A5s that block strong aces and have equity when called.

Risks and Rewards

• Reward: Wins the pot outright (12-13bb) without a flop, which is a significant gain.
• Risk: If called, the jammer is often in a coinflip or dominating situation, and with 200bb, losing means losing a huge stack.

Related Terms

• 3-Bet: A re-raise preflop.
• Jam: All-in move.
• Cutoff: Position at the table.
• Deep Stack Play: Strategy with large stacks relative to blinds.
• Polarized Range: A range split between very strong and weak hands, lacking medium-strength hands.