CO位河牌干燥牌面4bet（CO River 4-Bet Dry）

Meaning

CO River 4-Bet Dry is a composite poker term describing a specific betting action in a particular scenario. Specifically:

• CO (Cut Off): The second position to the right of the dealer, one of the late positions.
• River: The fourth community card (i.e., the final betting round).
• 4-Bet: Refers to a re-raise after at least three raises (typically a preflop concept, but here applied to the river, meaning the fourth bet or raise in that betting round).
• Dry: A dry board, i.e., a board structure that makes it difficult to form straight or flush draws (e.g., no flush draw, no connected cards).

Typical Scenario

This term usually appears when there has been aggressive raising preflop (e.g., someone 3-bet, 4-bet), and it continues postflop. Assuming the CO position made a 4-bet preflop, bet on the flop and turn, and then on the river someone raises again, and the CO re-raises, this could form a "river 4-bet". The dry board emphasizes that the opponent's range contains few draws, so the raise is more likely for value than bluff.

Strategic Implications

On a dry board, the value of made hands is clearer, and scare cards rarely appear. Therefore, a CO River 4-Bet Dry typically represents extremely strong hand strength (e.g., nuts or close to nuts), especially when the opponent still chooses to raise on a dry board. The CO's re-raise is often aimed at extracting maximum value. Players using this strategy should be cautious and avoid excessive bluffing, as opponents are more likely to fold on dry boards.

Notes

This term is not a standard poker term; it is mostly used in specific player communities or learning materials. In general, the number of raises on the river is limited, and a 4-bet there is extremely rare, appearing more often in preflop contexts.