庄位河牌彩虹面诈唬（BTN River Bluff Rainbow）

Term Composition

• BTN: Button, referring to the player in the button position, who has the advantage of acting last post-flop.
• River: The fifth and final community card.
• Bluff: Betting or raising with a weak hand in an attempt to force opponents to fold.
• Rainbow: A flop or turn where all three cards are of different suits, making a flush draw impossible. In the context of the river, a rainbow board means no flush is possible in the final community cards.

Strategic Meaning

This term describes a specific scenario where the button player bluffs on a rainbow board on the river. Since a rainbow board eliminates the possibility of flush draws, the bluffing range typically focuses on potential straight draws or made hands from the turn. The button's positional advantage allows for a more accurate assessment of the opponent's range and applying pressure with a river bet.

Key Considerations

• When bluffing on a rainbow river, the button player must consider whether the opponent's calling range contains enough foldable combinations.
• A rainbow board usually reduces the success rate of bluffs because the opponent's defending range is more stable (without interference from flush draws).
• Typical example: Flop K♦7♣2♠, turn J♥, river 5♦ (rainbow). The button, holding A♣Q♣, can bet on the river to represent a straight (9-10) or top pair, forcing the opponent to fold medium pairs.