枪口+1 翻牌前过牌-弃牌 彩虹面（UTG+1 Preflop Check-Fold Rainbow）
Describes planning to use a check-fold strategy on a rainbow flop from the UTG+1 position preflop, but the term is not standard due to phase contradiction.
Term Composition
The term consists of four elements:
- UTG+1 (Under the Gun+1): The second position to the left of the big blind, one of the early positions preflop.
- Preflop: The betting round before the flop is dealt.
- Check-Fold: Checking first and then folding if an opponent bets, commonly used with weak or medium-strength hands as a passive play.
- Rainbow: A flop where all three cards are of different suits, usually indicating a lower probability of a flush draw.
Logical Contradiction and Explanation
In standard Texas Hold'em, "Preflop" and "Rainbow" present a phase conflict: it is impossible to know the flop's suits before the flop. Therefore, "Rainbow" here should be understood as a preset strategy—meaning the player plans to execute Check-Fold only when the flop is a rainbow. This term is not a widely recognized fixed term; more common expressions are "UTG+1 Check-Fold range" or strategy adjustments under specific flop textures.
Typical Scenario (Example)
Suppose you are in UTG+1 with a weak hand (e.g., unsuited connectors), and no one raised preflop, you check. If the flop comes rainbow (e.g., A♠ K♦ 9♣), you continue to check; after an opponent bets, because your hand is weak and the likelihood of a draw is low, you fold. This sequence of actions could be informally called "UTG+1 Preflop Check-Fold Rainbow," but in a professional context, it should be described separately.