小盲位河牌双重下注彩虹面（SB River Double Barrel Rainbow）
SB River Double Barrel Rainbow
The small blind player, after consecutive bets on the flop and turn, bets again on the river with a board of three different suits. This play is essentially a triple barrel on a rainbow board.
Term Composition
"SB" refers to the Small Blind; "River" is the river card; "Double Barrel" typically refers to consecutive bets on the flop and turn. Here, combined with River, it indicates betting again on the river after consecutive bets on the flop and turn—i.e., a triple barrel; "Rainbow" means the community cards consist of three different suits, with no possible flush draw.
Strategic Meaning
This term describes the Small Blind's action of betting three consecutive streets on a rainbow board. Since the board has no flush draw and the Small Blind is out of position (forced into the pot preflop), this line usually represents a strong hand (such as top pair or better), or as part of a polarized range (containing very strong hands and bluffs). The rainbow board reduces the opponent's drawing possibilities, making the Small Blind's bet more credible.
Typical Application Scenario
For example, the Small Blind holds A♥K♠, with a flop of K♣8♦3♥ (rainbow), a turn of 2♠, and a river of 7♣. The Small Blind can bet all three streets, conveying to the opponent that he holds top pair or stronger.
Notes
- This term is not a standard label; in most situations, "triple barrel" or "third barrel" is used directly.
- On a rainbow board, lacking a flush draw, the opponent's calling range is more weighted toward pairs and straight draws.