Poker Term
小盲10BB防守（SB 10bb Defense）
SB 10bb Defense
When the effective stack depth is about 10 big blinds, the small blind position's defensive strategy facing an opponent's open raise involves choices of calling, pushing all-in, or folding.
Overview
SB 10bb Defense is a common short-stack scenario in Texas Hold'em, often occurring in late tournament stages or cash games with short stacks. When the small blind (SB) holds roughly 10 big blinds (BB) in effective stack and faces an open-raise from another position (especially the big blind or button), how to defend becomes a key decision.
Key Considerations
- Pot Odds and Fold Equity: The SB has already posted 0.5 BB, so the defensive cost is relatively low. However, if the opponent raises big (e.g., 2.5 BB), calling requires an additional 2 BB, while shoving may force the opponent to fold, capturing the dead money already in the pot.
- Range Construction: Typically, the SB defends with a tighter range, avoiding marginal hands that could lead to large pots. Common defending ranges include medium pairs, strong A-high hands, suited connectors, etc. The jam range usually includes value hands (e.g., TT+, AQ+) and some semi-bluffs (e.g., A2s, K8s) to balance the range.
- ICM Impact: In tournaments near the money bubble, the SB's survival equity is higher, so the defending range should be tighter. In the early stages or cash games, it can be slightly looser.
- Opponent Tendencies: If the opponent folds often, the SB can widen the shoving range. If the opponent calls wide, the SB should focus more on hand strength.
Common Actions
- Fold: For very weak hands (e.g., 72o), even with pot odds, it's usually correct to give up.
- Call: Suitable for medium-strength hands (e.g., K6s, 77) – hoping to see a flop and leverage position. However, if the flop misses, subsequent pressure becomes high.
- Shove: When hand strength is strong or pressure is needed, go all-in directly, forcing the opponent to fold if they miss the flop.
Notes
- At 10 BB depth, the SB should generally avoid flat-calling and then being pressured into folding on the flop by an opponent's continuous bets.
- The shove size should be 10 BB; raising too small gives the opponent good calling odds.
- Unlike standard play, the SB at ultra-short stacks tends toward a linear, value-heavy shoving strategy to reduce complex decisions.