Fold to 4-Bet from UTG+1

Description

Fold to 4-Bet from UTG+1 (F4B UTG+1) is a position-specific HUD (Heads-Up Display) stat used primarily in no-limit hold'em cash games and tournaments. It represents the percentage of times a player who raised from UTG+1 (under-the-gun plus one, i.e., the second position to act preflop) folds to a 4-bet (a re-raise of their initial raise). The stat is calculated as:

F4B [UTG](/term/utg)+1 = (Number of folds to a [4-bet](/term/4-bet) when raising from [UTG](/term/utg)+1) / (Number of times facing a 4-[bet](/term/bet) after raising from UTG+1) × 100%

A player must have faced at least one 4-bet from that position for the stat to be meaningful. Sample size requirements vary, but generally 50+ hands from UTG+1 are recommended for reliable readings.

Typical Values and Interpretation

• Low (0–30%): The player rarely folds to 4-bets from UTG+1. This suggests they have a strong opening range from that position and are confident in defending against aggression. Alternatively, they may be calling 4-bets light or 4-betting themselves, but the stat only tracks folds.
• Medium (30–55%): A balanced approach. The player folds some of the time but also continues with strong hands.
• High (55–100%): The player folds very often to 4-bets from UTG+1. This indicates a polarized opening range: they may be raising a wide range but only continuing with premium hands (e.g., AA, KK, sometimes AK) or they are exploitable in this spot.

Strategic Implications

In early position (UTG+1), players typically open a tighter range than later positions. A high fold to 4-bet from UTG+1 can be exploited by aggressive opponents who may 4-bet more often as a bluff, knowing the original raiser will fold most of the time. Conversely, a low fold to 4-bet suggests the player is sticky and may call 4-bets with weaker holdings, making them a target for value-heavy 4-bets.

This stat must be considered alongside other metrics, such as UTG+1 Raise First In (RFI), 3-bet frequency, and overall fold to 4-bet (regardless of position). A player with a high RFI but also high F4B UTG+1 is likely exploitable: they open many hands but fold to re-raises. In contrast, a low RFI with low F4B indicates a very strong opening range that is resilient to 4-bets.

Limitations

The stat is only relevant when the player is the original raiser from UTG+1 and faces a 4-bet. It does not capture situations where they are the 3-bettor or caller. Additionally, sample size and game dynamics (e.g., tournament stack sizes, table image) can affect interpretation.