按钮位河牌圈彩虹面反加注（BTN River 3-Bet Rainbow）

Term Analysis

BTN River 3-Bet Rainbow describes a specific scenario: on the river, the button player makes the third raise (i.e., a 3-bet) while the board is a rainbow (all three flop cards are of different suits, usually indicating no flush draw possible). In Texas Hold'em, the standard betting rounds are only preflop, flop, turn, and river. Preflop uses terms like "Bet/Raise/3-Bet", but on the river, "Bet/Raise/Re-raise" is more common. However, some players colloquially refer to any third raise on any street as a "3-Bet". Therefore, this term emphasizes the betting round, position, and board texture.

Application Scenarios

• Anti-steal and Value Raise: Button players often play aggressively from late position. On a rainbow river, if no flush is possible, the button player may use position to 3-bet with strong hands for maximum value, or as a bluff to force opponents to fold.
• Adjusting to Opponent Ranges: A rainbow board reduces the likelihood of opponents having draws, so a 3-bet is more likely to represent made hands. The button player should evaluate opponent ranges; on a rainbow board, opponents tend to hold top pair, two pair, or straights.
• Typical Example: Suppose the flop is K♠ 9♥ 2♦ (rainbow), turn is 5♣ (still rainbow), river is A♠ (board remains rainbow but an A appears). The button player, facing a bet and then a raise from another player on the river, 3-bets with the nut straight or a set, fitting this term.

Notes

• This term is not a standard professional term; it is more common in informal discussions or teaching examples. In formal poker, the third raise on the river is usually called a "Re-raise".
• The rainbow feature is only meaningful when first appearing on the flop; after the turn and river, the board may change (e.g., turn rainbow but river brings a flush). "Rainbow" in this term specifically refers to the river board still having three different suits, but it is mostly a descriptive expression.
• Positional factor: The button acts last, giving an informational advantage, but a 3-bet requires stronger hand strength because opponents may have already shown strength.