关位翻牌前双枪彩虹面（CO Preflop Double Barrel Rainbow）
After raising in the cutoff CO preflop, when the flop comes with three cards of different suits rainbow flop, an aggressive play of betting again double barrel.
Term Analysis
"CO Preflop Double Barrel Rainbow" is a combined poker term describing a specific aggressive betting pattern. Here: "CO" stands for Cutoff, the position immediately to the right of the button; "Preflop" refers to the action stage before the flop; "Double Barrel" means two consecutive bets (typically including a preflop raise and a flop c-bet); "Rainbow" describes a flop with three cards of different suits, making a flush draw less likely.
Strategic Significance
This play is often used to raise preflop from the CO with strong hands or semi-bluffs. When the flop comes rainbow, the lack of flush draw threats makes a continuation bet more effective at representing made hands (e.g., top pair, overpair), forcing opponents to fold. If the flop structure is dry (e.g., K♠7♦2♣), the double barrel is even more effective.
Key Execution Points
- The CO preflop raising range should include both value hands and bluffs to balance your image.
- Flop bet sizing is typically 60–75% of the pot.
- Pay attention to opponent ranges: if opponents call frequently, adjust to more solid value bets with made hands.
Notes
This term is not a standard poker term and is commonly encountered in advanced strategy discussions. It should be understood in context. Beginners should first master basic continuation bets (C-Bet) and board texture analysis.