Poker Term
10大盲注防守（10bb Defense）
10bb Defense
10bb-defense Refers to a defensive strategy when the stack size is approximately 10 big blinds, facing a raise. It typically involves a wider range and decisions to either shove or fold.
Overview
10bb defense is an important part of short-stack strategy in poker, commonly seen in late tournament stages or deep-stack cash games. When a player's stack drops to around 10 big blinds, the defense range widens significantly due to attractive pot odds and the vulnerability of their own chips.
Key Factors
- Pot Odds: If an opponent raises to 2.5bb, you need to call 2.5bb, the pot already has 3.5bb, giving odds of approximately 1.4:1. You only need about 42% equity to break even.
- Fold Equity: Shoving with a short stack has some fold equity, especially when the opponent's raising range is wide.
- Range Composition: Typical defense ranges include all pairs, Ace-high hands, some suited connectors (e.g., 54s), but should avoid calling too often with dominated hands (e.g., KTo).
Strategy Points
- Shove or Fold: In most cases, calling is less effective than shoving at 10bb. Shoving allows you to take away the initiative from the opponent and maximize fold equity.
- Against Different Opening Ranges: Against tight players, tighten the defense range; against loose players, you can widen it appropriately.
- Position Influence: Defense ranges differ slightly in the small blind or big blind. The big blind, having already posted 1bb, needs to defend more frequently.
Common Mistakes
- Over-defending: Some hands like Q5o may be borderline calls in terms of odds, but could be losing in the long run.
- Neglecting ICM impact: Near the money bubble or final table, the defense range should be tightened.
Overall, 10bb defense is a delicate decision balancing pot odds and survival probability, requiring flexible adjustments based on opponent tendencies and tournament structure.