CO河牌彩虹面驴式下注（CO River Donk Bet Rainbow）
On a rainbow flop three cards of different suits, a donk bet made by the cutoff player on the river.
Term Breakdown
- CO (Cutoff): The cutoff position, located to the right of the button. It acts late preflop and often has an aggressive raising range.
- River Donk Bet: A donk bet on the river. A donk bet refers to a player who did not actively raise in the previous round taking the lead by betting in the new round before the previous round's raiser acts. It usually indicates a specific hand strength or an intention to polarize.
- Rainbow: Refers to a flop where all three cards are of different suits. This typically reduces the probability of flush draws, making made hands more straightforward in value.
Strategic Meaning
This term usually appears in hands where the flop is rainbow. The CO player did not take the lead on the flop or turn, then suddenly leads out on the river. This sequence carries strong range polarization implications:
- Value Bet: Represents a very strong made hand, such as a completed straight on the river, a set, or two pair, aiming to extract maximum value.
- Bluff: Represents a bluff after a missed draw, exploiting the fact that the rainbow board restricts the opponent's range.
Because the CO's preflop range is wide and the rainbow flop limits flush draws, the river donk bet appears abnormal. The opponent must deduce the CO's hand strength based on bet sizing and range.
Typical Scenario
The CO player calls a button's raise preflop. The flop is rainbow (e.g., A♠9♦4♣). CO checks, button makes a continuation bet, CO calls. Turn is K♣, both check. River is 2♥, CO leads out. This bet is what the term refers to.
Notes
The term itself does not presuppose any specific hand example; practical application requires considering opponent tendencies and table dynamics. A rainbow flop reduces the likelihood of flush draws, so the CO's river donk bet is more likely to represent a made hand or a pure air bluff, rather than a semi-bluff.