SB Turn Raise-Fold Rainbow

Overview

"SB Turn Raise-Fold Rainbow" describes a specific line taken by the player in the small blind (SB) on the turn betting round, on a board where all four cards are of different suits (a rainbow board). The action consists of two parts: first, the SB raises after facing a bet from an opponent (typically the big blind or a later position), and second, when faced with a re-raise (3-bet on the turn), the SB folds. This term is not a standard poker jargon but rather a descriptive play pattern used in training or analysis.

Components

• SB: The small blind, who is out of position for the rest of the hand.
• Turn Raise: The SB initiates a raise on the turn, often as a semi-bluff or value raise. The turn is the fourth community card.
• Fold to Re-raise: The SB folds when the opponent raises back (3-bets the turn), indicating the SB's raise was not intended to continue against further aggression.
• Rainbow Board: All four board cards are of different suits, reducing flush possibilities. This makes the board texture more dry, meaning draws are less plentiful.

Strategic Context

In typical scenarios, a rainbow turn board reduces the number of flush draws, so the SB's raise is often representing a made hand (like top pair or two pair) or a straight draw. The decision to fold to a re-raise suggests the SB's hand was not strong enough to withstand further aggression, or the re-raise signals that the opponent has a very strong hand (e.g., a set or top pair with a good kicker). This line is often employed as a bluff or thin value raise that fails. Players using GTO (Game Theory Optimal) strategies might balance this line with some strong hands that would call or re-raise for value.

Example Hand

This is an illustrative example, not from actual play.

• Preflop: SB calls BB's raise. Flop: K♠ 7♦ 2♣ (rainbow). Check-check.
• Turn: J♥ (rainbow board). BB bets. SB raises. BB re-raises. SB folds.

Here, the SB might have had something like K♣ 9♣ (top pair, weak kicker) and tried to raise for value/protection, but folded when the BB showed strength with a re-raise.

Related Terms

• Turn Raise: A raise made on the turn betting round.
• Rainbow Board: A board with all cards of different suits.
• SB (Small Blind): The player who posts half the big blind and acts first post-flop.
• Fold Equity: The chance that a bet or raise causes opponents to fold.