小盲位河牌静态4-bet（SB River 4-Bet Static）

Term Background

In GTO (Game Theory Optimal) strategy for Texas Hold'em, players sometimes use a "static" range to simplify decision-making, i.e., using a preset fixed range in specific positions and scenarios, rather than dynamically adjusting based on opponent tendencies. SB River 4-Bet Static specifically refers to the static range when the small blind makes a fourth bet (i.e., 4-bet) against an opponent's bet on the river.

Strategic Significance

A 4-bet on the river typically means all-in (since the pot is large, the raise size is often close to or equal to the effective stack). The SB (small blind), as the preflop aggressor or caller, usually includes strong hand combinations in its river 4-bet range, such as nut flushes and full houses. A static range means the range does not change based on opponent's action history or tells, making it suitable when lacking information about the opponent or when facing an unknown opponent.

Construction Principles

A static range must consist of extremely strong hands to ensure positive expected value when the opponent's range does not deviate. Typical components include:

• Absolute nut combinations (such as nut flush or straight flush on the board)
• Some medium-strength but high-making hands (decided based on the board)

Generally, the SB's static 4-bet range on the river should be very narrow, usually containing only a few high-value combinations to avoid unnecessary risk.

Limitations and Cautions

Although a static strategy simplifies decision-making, it can be exploited by experienced opponents (e.g., after identification, they may bluff frequently). In actual play, players often incorporate dynamic adjustments, balancing based on opponent's fold rate or raise frequency. Therefore, SB River 4-Bet Static is more of a learning framework or initial strategy, not an optimal long-term profit solution.