小盲位河牌干燥牌面全下（SB River Jam Dry）
SB player's aggressive move of going all-in on the river against a dry board, usually representing a strong hand or a polarized range.
Meaning and Background
SB River Jam Dry is a specific aggressive strategy in Texas Hold'em. "SB" stands for Small Blind, "River" is the fifth community card, "Jam" means all-in, and "Dry" refers to a dry board, i.e., a board structure that makes it difficult to form strong draws or have weak potential for flushes, straights, etc., for example: K♠8♥2♣7♦3♠.
Strategic Logic
On a dry board, the opponent's range tends to be more weighted toward made hands rather than draws, so the small blind's all-in has a polarizing effect: either a very strong hand (like top pair top kicker, sets, two pair) or a pure bluff. Since the dry board is difficult to evolve, opponents find it hard to call with medium-strength hands, so this play is often used to force opponents to fold marginal hands or middle pairs.
Considerations
- Positional Disadvantage: The small blind is out of position post-flop, so river all-ins usually need to be combined with the betting history from pre-flop and the flop.
- Range Balancing: Using this play too frequently can lead to exploitation by opponents, so it should be mixed with value hands.
- Opponent Tendencies: More effective against tight-passive players; use caution against calling stations or loose-aggressive players.
Example
Pre-flop, the small blind calls the big blind. Flop: K♠8♥2♦. Small blind checks-calls. Turn: 7♣. Both check. River: 3♠. Small blind shoves all-in. In this case, the small blind might hold KQ or 88, or could be bluffing with air like A4.