PFR
翻牌前加注率
Context: Term: Pre-Flop Raise (PFR) Pre-Flop Raise (PFR) refers to the frequency with which a player voluntarily raises (including raises and re-raises) before the flop. It is a key metric for measuring a player's aggression.
Context: Term article: Pre-Flop Raise Percentage (PFR)
Overview
PFR (Pre-Flop Raise) is one of the most important statistics in Texas Hold'em, often used in conjunction with VPIP (Voluntarily Put Money In Pot). It indicates the percentage of hands where a player actively raises (including initial raises and re-raises) before the flop out of all hand opportunities. For example, a player with a PFR of 15% raises pre-flop in about 15 out of every 100 hands.
Calculation Method
The formula for PFR is:
PFR = (Number of Pre-Flop Raises / Total Hands) × 100%
Note: PFR only counts active raises, excluding calls or folds. If a player goes all-in pre-flop, it is usually also counted as a raise.
Typical Ranges
- Tight-Aggressive (TAG): PFR is typically between 12% and 18%, with VPIP between 15% and 20%. Such players are selective with starting hands but aggressive when they enter the pot.
- Loose-Aggressive (LAG): PFR is above 20%, with VPIP above 25%. They raise with a wider range of hands and are highly aggressive.
- Tight-Passive (TP): PFR is low (< 10%), VPIP is also low, and they raise infrequently.
- Loose-Passive (LP): PFR is low (< 10%), but VPIP is high (> 30%). They often call rather than raise.
Application
The difference between VPIP and PFR (VPIP - PFR) reflects a player's passivity. The larger the difference, the more often they call and the more passive they are. For example, a player with VPIP 30% and PFR 10% calls frequently and is easily exploitable.
In strategy, against players with a high PFR (> 20%), you can widen your calling range, but be aware that they may also hold strong hands. Against players with a low PFR (< 10%), their raises typically indicate strong holdings, so you should proceed cautiously.
Notes
PFR is influenced by game type (cash games or tournaments), position, stack depth, and other factors. For example, in the late stages of a tournament, PFR may increase due to blind pressure. Additionally, with a small sample size (e.g., fewer than 100 hands), PFR has limited reliability.