Fold to 3-Bet from SB

Context: Term article: 小盲位面对3Bet弃牌率（Fold to 3-Bet from SB）

Meaning

Fold to 3-Bet from SB is a statistical metric in Texas Hold'em that measures how often a player folds when they are in the small blind and face a 3-bet after making an open raise. It indicates the probability that the player folds when they have raised first from the small blind and then face a 3-bet from an opponent (usually the big blind or the button). This value is typically expressed as a percentage and can be calculated using tracking software such as Hold'em Manager or PokerTracker.

Calculation

The typical formula is: Fold to 3-Bet from SB = (Number of hands where the player folds after a 3-bet following a small blind raise) / (Total number of hands where the player faces a 3-bet after a small blind raise) × 100%. It should be noted that only hands where the player actively raised from the small blind and faced a 3-bet from an opponent are counted in this statistic.

Interpretation

• High fold rate (greater than 70%): The player folds too often to 3-bets from the small blind, which can be exploited by aggressive players who increase their 3-bet frequency to steal the pot.
• Low fold rate (less than 40%): The player over-defends, potentially calling or 4-betting too frequently, revealing their hand strength or landing in unfavorable situations.
• General recommended range: In low to mid-stakes games, a balanced range is usually between 50% and 65%, but this should be adjusted based on opponent tendencies and stack depth.

Strategic Significance

The small blind is the worst position post-flop (acting first post-flop), so caution is needed when facing a 3-bet. A reasonable folding frequency helps protect the blind and avoids difficult post-flop situations. Additionally, adjustments should be made based on the opponent: against aggressive 3-bettors, lower the fold rate and counter with more 4-bets or calls; against conservative 3-bettors, maintain a higher fold rate.