On boards where BTN has a large range advantage, even underpairs can become good barrel candidates. The key is to consider the value of the hands you fold out, blockers, and redraws together.
In a 25bb Spin & Go, when BTN opens and BB calls, the preflop structure already creates a favorable setup for BTN. BTN enters the pot with a relatively tight, linear range, while BB defends much wider because of good pot odds.
That is why on flops with many high cards, such as A-K-Q, A-K-J, or K-Q-J, BTN does not merely have position. BTN also has far more nutted hands and strong one-pair combinations. On these boards, BB is mathematically supposed to continue fairly often, but in practice, because of range structure, too many hands struggle to withstand pressure.
The boards BTN can pressure most aggressively are boards containing many high cards. Conversely, on low boards of 8-high or lower, BB’s wide defending range connects more often, so BTN’s automatic C-bet frequency decreases.
Flops Most Favorable for BTN, in Order
Suppose BTN opens to 2bb at 25bb effective and BB calls. The flop is A♠ K♠ Q♥. This is a classic structure where BTN can C-bet aggressively with almost the entire range. If BTN bets 3bb into a 4.5bb pot, about 67% pot, BB has to fold many Kx, Qx, weak draws, and high-card hands.
After BB calls the flop and the turn comes 5♦, the pot is 10.5bb. When BTN now bets 7bb again, an interesting question arises. Should an underpair like 66 check, or should it push forward as a bluff?
Turn pot after flop bet: 4.5 + 3 + 3 = 10.5bb
Turn bet: 7bb into 10.5bb
Break-even fold frequency for a pure bluff: 7 / (10.5 + 7) = 40.0%
Equity BB needs when calling: 7 / (10.5 + 7 + 7) ≈ 28.6%
66 gains immediate significant value if it folds out hands currently ahead, such as Kx and Qx
Even when called, it is better than complete air because a river 6 can improve it to a set
66 has almost no showdown value. If it checks and reaches the river, it loses to most of BB’s hands containing just one A, K, or Q. But when it bets, the story changes.
First, the moment BB folds Kx or Qx, 66 has pushed out hands stronger than itself. This is not just a simple bluff. It is a real form of value realization. Second, even when called, there remains a small chance of hitting a 6. Third, because the EV of checking is low, the required fold equity threshold is lower than it may seem.
Intuitively, AA feels strong enough to keep betting, while 66 feels like a hand you want to give up. But in this spot, you should think in the opposite direction.
When you hold AA, you greatly reduce the Ax combinations BB can have. In other words, there are fewer top-pair hands that can call your bet, and there are not many hands you actively want to fold out. Folding out Kx or Qx is not a big gain for AA, because those hands are already nearly dead.
By checking instead, you give BB a chance to bluff or bet thinly on the river. Strong hands do not always have to bet. What matters more is which hands your bet forces to fold.
For example, J♠7♠ may look like a natural bluff. It is suited, and it is easy to imagine some straight potential. But when you hold a J, you block some of the J-high hands BB could call on the flop and then give up on the turn. In other words, you are blocking the hands you want to fold.
By contrast, a hand like 6♠5♠ can be a much better barrel candidate. If it folds out flush draws, it removes hands that could beat you at showdown, and holding a 5 also reduces some of BB’s check-raise combinations. On top of that, it has a chance to win a big pot if it improves to a straight.
Most players feel uncomfortable firing the turn with low pocket pairs. So they build their bluffing range only with more familiar hands like flush draws, open-enders, and gutshots.
This approach is not a completely broken strategy. If you only look at overall betting frequency, the difference may not be huge. But the range composition changes. If you bluff only with natural draws, your opponent can infer that your barrels have a clearer structure, and the checking frequency of certain strong hands also changes.
This concept should not be applied the same way to every flop. On a board like K♥8♦7♦, where there is only one broadway card, BB’s defending range connects much better. BTN can still have good hands, but it is much harder to pressure with the entire range compared with an AKQ board.
On two-broadway boards like J♥T♥5♦, a strategy of betting small and wide on the flop often appears. But the turn card matters. High cards like A, K, and Q that do not complete a flush are good for BTN. By contrast, a low heart turn that completes BB’s flush draws reduces BTN’s advantage.
Questions to Check Before Barreling the Turn
On boards where BTN is overwhelmingly favored, ordinary bluffs alone do not fully use the power of the range. On a flop like AKQ, if BB calls the flop but has a hard time continuing on the turn, low pocket pairs and weak pairs can also become aggressive candidates.
The key is not the current label of the hand. 66 is not an automatic check just because it is an underpair. You need to compare what your bet makes fold, what backup plan you have when called, and how little value the hand has when checked.
원문: https://blog.gtowizard.com/the-art-of-value-bluffing-from-the-button/
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