按钮位同花面河牌偷池（BTN River Steal Monotone）
When the flop and turn are both monotone and the river also remains monotone, a large bet made by the button player on the river, attempting to force an opponent to fold and win the pot.
Background & Scenario
BTN River Steal Monotone occurs on a board where all three flop, turn, and river cards share the same suit, i.e., a monotone board. At this point, any player holding one card of that suit could potentially have a flush. The Button (BTN) player bets on the river, intending to represent holding a flush, thereby forcing opponents to fold.
Strategic Importance
In a balanced GTO strategy, the betting range on a monotone river must include value hands (actual flushes) and bluffs (hands that do not have a flush but represent one). The Button, due to its positional advantage, can more easily assess opponents' ranges from late position, making it suitable for such steal attempts.
Common Practices
- Bet Sizing: Typically 66%–100% of the pot, or even an overbet, to increase the threat of the bluff.
- Range Construction: The bluffing portion often selects hands that do not have a flush draw but block opponents from holding top pair or overpairs, such as an Ace of the suit as a blocker.
- Considerations: The opponent's calling tendencies and sensitivity to monotone boards must be taken into account. Against a "calling station," frequent steal attempts are inadvisable.
Typical Example
Suppose the board is A♠ K♠ 7♠ 4♠ 2♠, and the Button holds Q♥ Q♦. The Button bets 80% of the pot, trying to force opponents to fold any top pair or middle pair they might hold. If an opponent holds no ♠, they may believe the Button has a flush and fold.
Risk Assessment
This steal is riskier when opponents have wide ranges or strong made hands, especially in multiway pots. It should be used cautiously in conjunction with opponent data (e.g., fold percentage) and ICM pressure (in tournaments).