Poker Term
按钮位河牌彩虹四倍下注（BTN River 4-Bet Rainbow）
In poker, refers to a specific game situation where the button BTN player makes a fourth bet i.e., the third raise on the river, with a rainbow board three different suits, no flush possible.
Term Explanation
Components
- BTN (Button): Button position, i.e., the dealer position, which is the last to act preflop, giving positional advantage.
- River: The river betting round, after the final community card is dealt.
- 4-Bet: The fourth bet, typically referring to the third raise (initial bet is first, first raise is 2-bet, next raise is 3-bet, third raise is 4-bet). On the river, there are fewer betting rounds than preflop, so a 4-bet only occurs in rare situations where three prior actions have occurred (e.g., someone 3-bet preflop, someone bet and raised on the flop, someone bet on the turn, and then a re-raise on the river).
- Rainbow: A rainbow board, meaning the flop or final board contains three different suits, eliminating the possibility of a flush draw.
Situational Application
This term is typically used in advanced strategy discussions to describe an extreme bluff or value betting scenario. Since the rainbow board removes the flush threat, players are more inclined to make large bets with marginal made hands or air. The button's 4-bet on the river represents an extremely strong range (usually the nuts or a very strong hand), but it can also use position and board structure to bluff.
Notes
- This term is not a core concept in standard poker textbooks; it is more of a shorthand used in practice to describe a specific rare scenario.
- A 4-bet on the river rarely happens because it requires enough previous betting rounds. Typical example: a 3-bet pot preflop, a bet and raise on the flop, a bet and call on the turn, and then a lead bet followed by a raise and a re-raise on the river constitutes a 4-bet.
- In actual application, players need to combine pot odds, opponent tendencies, and board structure for comprehensive decision-making.