Poker Term

CO位河牌湿牌隔离加注（CO River Isolation Raise Wet）

In the cutoff CO on the river, when the board is wet draws possible for straights or flushes, a player makes an isolation raise to isolate an opponent or extract value.

Term Explanation

CO River Isolation Raise Wet is a combined poker term describing a specific post-flop action in Texas Hold'em. The term consists of four key elements:

  • CO: Refers to the Cut-Off position, one of the later positions pre-flop, directly to the right of the button.
  • River: The fifth and final community card dealt, and the betting round that follows.
  • Isolation Raise: A raise intended to force weaker hands to fold, isolating a single opponent or reducing the number of participants in the pot. On the river, it is often used for value or as a bluff.
  • Wet: Refers to a board texture with obvious drawing possibilities, such as flush or straight draws. A wet board means opponents may hold completed hands or strong draws.

Usage Scenarios & Strategy

  • Typical Situation: The CO player, facing one or more opponents on the river, believes their hand has enough value on a wet board, and raising can force opponents who missed their draws to fold, or extract extra value from weaker made hands.
  • Purpose:
    • Value Extraction: When the CO player holds a strong made hand (e.g., full house, flush, straight), an isolation raise can extract more value from opponents who missed draws or hold weaker hands.
    • Bluff: If the CO player suspects opponents hold draws that missed, and they hold blockers (e.g., key cards for the draw), an isolation raise can represent a strong hand and force folds.
  • Notes:
    • Wet boards increase the likelihood opponents have strong hands, so isolation raises should be used cautiously to avoid being re-raised by stronger made hands.
    • The CO position offers positional advantage on the river, allowing observation of opponents' actions to better judge whether an isolation raise is appropriate.

Example

In a hand with a board of K♠ 9♠ 7♦ 6♠ 2♣ (offering flush and straight possibilities), the CO player holds 9♥9♦ (a set). After the CO bets on the river, an opponent raises. The CO chooses to re-raise (isolation raise) aiming to isolate a possible flush-holding opponent and extract value.

Related Terms

  • CO Position: Cut-Off, with significant post-flop positional advantage.
  • River: The final betting round.
  • Isolation Raise: Reducing the number of opponents in the pot.
  • Wet Board: A community card structure with high drawing potential.

Related Terms

Isolation Raise