On the turn, ranges become much more polarized than they were on the flop. This article explains when to use 66-100% pot barrels by considering turn-card type, range advantage, SPR, and the river plan together.
Many players repeat the same mistake on the turn. Since a small c-bet worked on the flop, they assume they can continue in a similar way on the turn. But the turn is not just an extension of the flop. It is the point where the pot structure changes completely.
On the flop, you can often bet widely with medium value, backdoors, and weak equity mixed in. On the turn, however, a call has already gone in, so your opponent's range is stronger, and the pot is larger relative to the remaining stacks. That is why turn betting ranges usually narrow into strong value and enough bluffs.
Flop c-bets are often small and wide. On A-high boards, you can use a small size to pressure your opponent's air and backdoors; on low boards, you can bet with overcards and backdoors mixed in.
But on the turn, medium hands become awkward. Top pair with a weak kicker, second pair, underpairs, and weak draws are in a tough spot if they bet and face a raise, and they often struggle to extract three streets of value. These hands frequently move into the checking range on the turn.
A turn bet has four main purposes.
You do not need to memorize complex solver mixes for the turn. Instead, if you judge each spot in the same order, your practical accuracy improves.
4 Steps for Turn Bet Sizing
A brick is a card that does not complete a flush or straight and does not significantly change the top-pair structure. For example, suppose BTN opens, BB calls, the flop comes Kc 7d 2s, the c-bet gets called, and the turn is the 3h.
This kind of card is usually good for the flop aggressor. The opponent folded many air hands on the flop, and the remaining range is compressed into Kx, 7x, pocket pairs, and some backdoors. The aggressor can apply heavy pressure with strong Kx, overpairs, sets, and well-chosen bluffs.
Overcards like A, K, and Q are powerful, but they are not always good for the aggressor. The key question is who has more of that card.
For example, LJ opens, BB calls, and on a 7h 2c 2d flop, LJ c-bets and BB calls. If the turn is the Ks, LJ can have more strong Kx and overpairs, so LJ can increase barrel frequency. Conversely, if BB's calling range retains a lot of Kx, blindly firing big becomes dangerous.
When a third card of the same suit falls on the turn, existing one-pair value becomes thinner. Even top pair that looked strong on the flop now has to be compared against flushes.
On high flush-completing cards, the in-position player can sometimes continue betting top pair and strong draws with a small size. But on low flush-completing cards, the caller may have connected with more suited hands, so the aggressor should check more often and build a more polarized betting range when betting.
Straight-completing cards must be evaluated alongside preflop ranges and the flop calling structure. On Jd 9c 6s, when the turn is the 8h, hands like T7, QTs, and 75s become meaningful. Sizing depends on who can naturally have more of these hands.
If your range contains many straights and strong two-pair hands while your opponent is tied to one pair, a large bet is effective. Conversely, if the caller has more of those connected hands, you need to protect your range by checking.
When the board pairs, the number of strong combinations decreases, while the distribution of trips and full houses becomes important. When a high card pairs, for example Ac 8d 4s Ah, the preflop raiser often benefits because they hold many Ax hands.
By contrast, when a low card pairs, BB can have more trips. On a turn like 9s 6d 3c 6h, BB defended a wide range of 6x, so OOP may even have a reason to lead.
Turn pot: 9100
Hero's bet: 7700, about 85% pot
For Villain to call, they must put in 7700 to contest a final pot of 24500
Required equity: 7700 / 24500 ≈ 31%
QhJh has 2 overcards and some backdoor heart potential, but the main point is applying heavy pressure to BB's 7x, 88-TT, and weak Kx
On a brick turn, Hero's strong Kx, AA, and sets can keep using a large size, making it natural to build bluffs with the same size
At 20bb effective, a turn bet quickly leads to stack commitment. Once the pot has grown after the flop, even a 60-80% pot bet on the turn leaves a natural all-in on the river. So at 20bb, rather than forcing thin value on the turn, it is important to choose hands and bluffs that can withstand a river shove.
At 40bb, the situation is different. Because the remaining SPR is larger, one turn bet does not automatically commit you. Checking frequency rises, and the betting range becomes more selective and polarized. Even on the same board, medium hands check back noticeably more often at 40bb.
Betting less often on the turn does not make you weak. You need a good checking range for your big bets to be credible. Keep some strong hands in your checking range, protect your awkward showdown value, and when you do bet, push clear value and bluffs with a large size.
Solvers may mix several turn sizes such as 75%, 100%, and 150%. But in practice, it is difficult to copy those complex numbers exactly. The important message is that you need leverage, not that you must randomize perfectly every time.
As a practical default, using around 85% pot with a polarized turn betting range works well. Use the large size on bricks or overcards that favor your range, and check more on turns where a flush or straight completes more favorably for the opponent.
Good Conditions for a Large Turn Bet
If you decide turn sizing based on how you feel about your hand, your strategy will wobble. Classify the turn card first. Is it a brick, an overcard, a flush-completing card, a straight-completing card, or a paired board? Then decide whom that card favors.
If the answer is your side, use a large size with strong value and good bluffs. If the answer is your opponent's side, check more and be more selective when betting. The turn is the street where one small habit can carry you all the way into a river all-in decision.
원문: BBZ Poker Blog
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