MP 15bb 3-Bet Jam
MP 15bb 3-Bet Jam
A preflop all-in 3-bet from middle position with a stack of 15 big blinds, typically used as a shoving strategy in tournament play.
Definition
MP 15bb 3-Bet Jam refers to a specific poker tournament strategy where a player in Middle Position (MP) with a 15 big blind (bb) stack faces an open-raise from early position (EP) or MP itself and responds by moving all-in as a 3-bet (a "jam"). This play is common in tournament poker, especially when stack sizes are short (15bb is considered a short stack) and the goal is to either win the pot uncontested or go to showdown with marginal equity.
Strategic Context
At 15bb, a player's options are limited. A standard 3-bet (non-all-in) would commit too much of the stack, making it difficult to fold later. Therefore, the all-in jam becomes a linear shoving range that denies the opponent's implied odds and simplifies decision-making.
Typical Ranges
- GTO-like ranges: From MP, a 15bb jam range against a typical EP or MP open of 2-2.5bb might include hands like AT+, KQ, 77+, and possibly suited connectors (e.g., 54s) for balance. However, exact ranges vary based on opponent tendencies and ICM pressure.
- Exploitative adjustments: If opponents open too wide or fold too often, the jam range widens. Conversely, against tight openings, the range narrows to premium hands.
Considerations
- Position: MP is early-middle; the jam must survive potential callers from later positions (CO, BTN, blinds). Hence, a stronger range is needed compared to a btn or sb jam.
- Stack depth: At exactly 15bb, the jam is not desperate (as with <10bb) but still aggressive. It maximizes fold equity while preserving chips if called.
- ICM implications: In tournaments, the cost of elimination reduces the incentive to flip. Thus, jamming with marginal hands may be avoided if min-cash is close.
Usage Example
In a tournament with blinds 500/1000, Hero in MP has 15,000 chips (15bb). UTG opens to 2,200. Hero decides to 3-bet jam with AJo, hoping to force folds from UTG and later players.
Related Terms
- 3-Bet: A re-raise after an initial raise.
- Jam: All-in bet.
- Short Stack: A stack size below 20bb where conventional raise-fold strategies become suboptimal.
- Fold Equity: The chance that a bet forces opponents to fold.