按钮位置彩虹面河牌公开下注（BTN River Open Rainbow）

Term Explanation

BTN River Open Rainbow is a compound term describing a specific betting scenario in Texas Hold'em.

Breakdown

• BTN: Refers to the Button position, the seat that acts last postflop, providing an informational advantage.
• River: The river betting round, after the fifth community card is dealt.
• Open: Means the first bet made when no one has bet before (open bet).
• Rainbow: Usually refers to a flop where all three community cards are of different suits, making a flush draw impossible on the flop. When used on the river, "Rainbow" generally extends to mean that no flush draw has been possible throughout the hand, i.e., there are no three cards of the same suit among the community cards.

Scenario Meaning

This term is commonly used in strategic discussions to highlight that the button player, facing a "clean" board (no flush threat) on the river and in position, can have a wider betting range because it is harder for opponents to check-raise with flush hands. In this spot, the bet typically represents either a value hand or a bluff, but adjustments depend on the opponent's range.

Notes

• In actual play, describing the river as "rainbow" is less common than for the flop; when used, it must account for whether the turn and river have affected the board's suit composition.
• This term appears mostly in advanced strategy analysis and is not a basic concept.