CO 200bb 3-Bet Jam

Overview

CO 200bb 3-Bet Jam is a preflop aggressive strategy used under deep stacks, typically employed from the Cutoff position with an effective stack of about 200 big blinds. The "200bb" in this term refers to the smaller of the two players' effective stack depth, not a specific player's actual chip count.

Strategy Background

At standard depths (e.g., 100bb), a 3-Bet typically uses a standard size (about 2.5-3x the raise amount). However, when stack depth reaches 200bb, a standard 3-Bet may create a pot that is too large, making postflop play difficult. In this situation, jamming all-in can:

• Apply maximum pressure, forcing opponents to fold a wide range of calls.
• Avoid playing postflop out of position (CO is in a poor position postflop, especially when the opponent is on the BTN).
• Simplify decision-making and reduce complex postflop scenarios.

Applicable Scenarios

• The opponent on BTN, SB, or BB has a wide calling or raising range and is unlikely to call an all-in with medium-strength hands.
• Holding a strong hand (e.g., AA, KK etc.) but needing to balance your range.
• Targeting specific opponent tendencies, such as frequent blind stealing with a high fold-to-3-bet rate.

Risks and Considerations

An all-in with 200bb is extremely high risk. If the opponent holds a top-end range (e.g., AA, KK), you may be called and lose a large number of chips. This strategy should not be used frequently; it must be combined with opponent data and your own range balance. Generally, under deep stacks, it's preferable to prioritize a standard 3-Bet and only use the all-in in specific situations.

Example

Suppose you are on the CO with A♥K♠ and an effective stack of 200bb. The BTN player raises to 3bb, and you choose to jam all-in for 200bb. This move forces the BTN to call only with very strong hands (e.g., QQ+, AKs) and fold a large portion of their weaker raising range.