CO位河牌单调面5-bet（CO River 5-Bet Monotone）

Term Decomposition

• CO: Cutoff, the position immediately to the right of the dealer button, typically having a strong preflop raising range.
• River: The fourth and final betting round after the fifth community card is dealt.
• 5-Bet: Originally refers to the fifth raise preflop (e.g., Open → 3-Bet → 4-Bet → 5-Bet). Postflop, "5-bet" is rarely used; terms like "only two bets left" are more common.
• Monotone: All community cards share the same suit. For example, a flop of three suited cards, with the turn and river also suited, creating an extreme flush board.

Actual Meaning

In typical postflop betting structures, the maximum sequence is: bet → raise → re-raise → third raise (sometimes called a 4-bet). A fifth raise is extremely rare. Thus, "River 5-Bet" is uncommon and is only a standard term preflop. This term may appear in specific teaching systems to describe a scenario where the CO position makes an extreme value bet on the river with a very strong flush, but it is not a standard poker term.

Typical Example (Hypothetical)

• Suppose the board is K♠8♠3♠ on the flop, 2♠ on the turn, and 7♠ on the river, creating a monotone flush board.
• The CO holds A♠Q♣. On the river, an opponent bets, CO raises, opponent re-raises, and CO re-raises again (the fifth bet).
• Here, CO's 5-bet indicates extreme confidence in their flush (especially the nut flush).

Notes

• In real games, the number of postflop raises is limited by stack depth. A 5-bet can only occur with deep stacks and both players holding very strong hands.
• Most poker books do not specifically discuss this term. It is recommended to prioritize standard postflop terms such as raise, re-raise, etc.