关煞位河牌圈彩虹面持续下注（CO River C-Bet Rainbow）
Refers to a continuation bet made by the Cutoff player on the river when the flop is a rainbow three cards of different suits and there is no possible flush draw.
Term Analysis
CO River C-Bet Rainbow is a specific betting scenario in poker strategy, combining three elements: position, street, and board texture.
- CO (Cutoff): The seat to the right of the dealer button. It is a late position, providing an informational advantage.
- River: The final betting round.
- C-Bet (Continuation Bet): A bet made by the pre-flop raiser after the flop is dealt. C-Bets typically occur on the flop or turn; a river C-Bet is relatively rare and usually represents a strong hand or a specific bluff.
- Rainbow: A flop where all three cards are of different suits, making a flush draw virtually impossible. This results in a relatively "dry" board that is easier to read opponent ranges.
Core Scenario
This term usually describes a situation where:
- Pre-flop, the CO raises, and the big blind (or another player) calls.
- The flop is a rainbow, the CO bets (C-Bet), and the opponent calls.
- Both the turn and river are dealt, and the CO bets again on the river.
Here, the CO's bet represents a complete aggressive line from flop to river. Since the board is rainbow, the opponent's drawing range is limited, making the CO's bet more easily interpreted as a strong made hand (e.g., trips, two pair, top pair top kicker) or an attempt to represent strength.
Strategic Considerations
- Value Bet: When the CO holds a strong hand (e.g., top pair top kicker or better) on a rainbow board with no apparent drawing threats, a river continuation bet can extract value from opponents who call.
- Bluffing: Because a rainbow board lacks draws, the CO's bluff needs to tell a coherent story. For example, a pre-flop raise, a flop C-Bet, a turn check (if no turn bet was made), and a river bet. This pattern can easily be picked up by sharp opponents, so pure bluffs usually have low success rates.
- Frequency: On the river, the CO's C-Bet frequency should be lower than on the flop or turn, especially after opponents' ranges tighten.
Example
Assume an online six-handed table with blinds of $1/$2. The CO holds A♠K♣ and raises to $7. The big blind calls. Flop: Q♦8♥2♠ (rainbow). CO bets $10, big blind calls. Turn: 5♣, both check. River: 3♦, CO bets $20. Here, the CO's bet qualifies as a "CO River C-Bet Rainbow."
Related Terms
- C-Bet (Continuation Bet)
- Dry Flop
- Cutoff
- Position