Poker Term
CO位河牌对子面隔离加注（CO River Isolation Raise Paired）
On the river with a paired board, the player in the cutoff CO raises to isolate remaining opponents and exploit the board structure for value or bluff.
Term Background
This term describes a specific poker scenario: The hand reaches the river, the board is paired, and the player in the cutoff (CO) position chooses to raise. The CO is the position immediately before the last preflop action position, offering positional advantage to observe subsequent players' reactions.
Strategic Implications
- Isolation: The raise aims to force the remaining few opponents (usually 1–2) to fold or call, simplifying the situation and focusing the confrontation on a specific opponent.
- Paired Board: A paired river increases the likelihood of hands like full houses or trips, and also provides an opportunity to bluff by representing such hands. The CO player may hold a made hand (e.g., a full house) or use the paired board to bluff after a failed draw.
Usage Scenarios
Typical cases include:
- After the CO called or raised preflop, the pot becomes heads-up or three-way.
- The river pair completes a draw or strengthens existing hand strength—e.g., the player holds top pair, but the river pair improves it to two pair.
- Opponents' ranges suggest they may hold medium-strength hands, and the raise can force them to fold.
Considerations
- Assess opponents' fold frequency and calling ranges.
- Stack depth affects raise sizing; typically 2/3 to full pot.
- Overusing this line may allow experienced opponents to adjust and counter it.