SB AFq
SB AFq
SB AFq (Small Blind Aggression Frequency) is a poker statistic that measures how often a player takes an aggressive action (bet or raise) versus a passive action (check or call) when in the small blind position.
Overview
SB AFq (Small Blind Aggression Frequency) is a positional poker statistic derived from tracking software like PokerTracker or Hold'em Manager. It quantifies a player's tendency to play aggressively from the small blind by calculating the percentage of actions that are bets or raises (as opposed to checks or calls) when the player has the opportunity to act in that position.
Calculation
AFq is computed as: (Bets + Raises) / (Bets + Raises + Calls + Checks). It excludes folds because folding is a neutral action that does not contribute aggression. For SB AFq, the calculation is filtered exclusively for hands where the player is in the small blind. For example, if a player in the small blind bets 10 times, raises 5 times, calls 20 times, and checks 15 times, their SB AFq = (10+5) / (10+5+20+15) = 15/50 = 30%.
Interpretation
A high SB AFq (above 50%) indicates an aggressive player who frequently bets or raises from the small blind. This style can be effective in blind versus blind battles, generating folds from the big blind and applying pressure. Conversely, a low SB AFq (below 30%) suggests a passive player who often checks or calls. Such players may be exploitable by frequent continuation bets or raises, as they rarely lead into the big blind.
Typical Ranges
In online cash games, a player with a SB AFq of 40-50% is considered moderately aggressive. Professional players often adjust their SB AFq based on the opponent's tendencies and stack sizes. In tournaments, ICM considerations may reduce aggression from the small blind, lowering typical SB AFq values compared to cash games.
Limitations
AFq does not capture all aggressive actions (e.g., check-raises are counted as raises, but the context matters). Additionally, a small sample size can misrepresent a player's true tendency; at least 50-100 hands from the SB are recommended for reliable data. SB AFq should be used alongside other stats (like VPIP and PFR) for a complete profile.
Usage in Strategy
When facing an opponent with a high SB AFq, you can anticipate frequent bets and raises from the small blind, making it profitable to trap with strong hands or to re-raise light. Against a low SB AFq, you can bet more liberally into them, expecting folds or passive calls.
Example
Suppose in a 6-max cash game, the small blind has a SB AFq of 60%. Over 100 hands, they bet or raise 60% of the time when they have a chance. In a blind vs. blind scenario, you (big blind) might check-raise with a wider range, knowing the small blind will often bet again.