40% Is Not a Small Bet: A Real Student Hand Review on Turn Sizing
Most live players think they know what a small bet is. They bet 40% of the pot, call it small, and wonder why their bluffs keep getting called and their value hands keep getting stuck on the river. This hand came straight from a coaching call with one of my students, and it's one of the cleanest examples I've seen of a leak that almost every 1/3 and 2/5 player has.
The Hand
My student opens ace ten suited to 2.5 big blinds from late position, about 120 big blinds deep. A reg in the big blind calls. The flop comes king high, rainbow, nothing connected, something like king, nine, three. The villain checks, my student bets about a third of the pot, and the villain calls.
The turn is a king. Still rainbow. The villain checks again. My student bets about 40% of the pot, planning to give up if he gets called. The villain folds.
So it worked. But results don't tell you whether a decision was good, and the reasoning behind this bet had real problems.
The Wrong Goal
When I asked him what the purpose of his bet was, he gave me three answers. Deny equity. Find out where the villain is at. Get him to fold. All three are the wrong goal on this turn.
Finding out where you're at is never a reason to bet. And trying to get a fold on the turn is putting pressure on the wrong street. We'll get to why in a minute, but first you need to know who actually owns this board.
Who Has the Nut Advantage?
Late position opens, big blind calls. At this point the ranges look pretty similar. Both players can have all the king x hands. But think about what the big blind doesn't have. Ace king, pocket kings, pocket aces, and most of the strong king queen combos usually get three bet out of the big blind, especially against a reg who three bets at a reasonable frequency.
The opener still has all of those. So without knowing the exact other two cards, the player who opened has the nut advantage on a king high board, and it gets even stronger when a second king hits the turn.
That matters because your betting should be built for your whole range, not just the hand you're holding. If you'd bet a certain way with pocket kings here, your bluffs need to look exactly the same.
Why 40% Isn't Small
My student had the right instinct. He thought a big bet would look like a bluff and a small bet would look like a king trying to get paid. That's exactly the beauty of small bets, they cover both ends of your range.
The problem is his number. 40% is not a small bet. It's closer to half pot than it is to zero. Here's how I think about sizing:
Small: 10 to 25%
This is where small bets actually become powerful. 25% is the maximum I'd still call small, and 30% is really pushing it.
Medium: 25 to 75%
You can slice this range thinner, but this is the middle ground where most players live without realizing it.
Large: 75% and up
Big pressure bets and overbets. They have their place, and it's usually the river.
So what should the size be? Ask yourself what you'd want to get value from if you actually had the king. Weaker kings, sure. But also hands like pocket eights, pocket sevens, and ace x that paired one of the other board cards. With this villain, those hands would call somewhere around a quarter to a third of the pot, and they'd fold a lot more often to 40%. That's your answer. Bet the size that the bottom of his calling range can still call, around 25%.
Fold Equity Lives on the River
If you want people to fold, you have to put them in the environment where they're most likely to fold. Across every stake, especially at lower stakes, the river is the street with the most folds in it. Players are the most price sensitive there because there are no more cards to come.
So you don't apply your maximum pressure on the turn. You paint the story on the turn, and you finish it on the river.
That's why a small turn bet is so powerful. It lets you keep the lead. The pot grows exponentially as you bet, so a 25% turn bet still builds the pot, and when you get to the river you've kept enough stack behind to jam for 1.2 to 1.5 times the pot. That's the pressure that actually gets folds.
And the moment you check that turn, you've basically told the villain you don't have a king. You've given away all your fold equity on the river.
How Big Turn Bets Get You Value Owned
Here's the mistake I see from most low stakes players, and from most of the non pros I work with. They want fold equity on the turn, so they bet 60 or 70% of the pot.
Try to imagine this. The pot is 30 big blinds and you put 20 in on the turn. Is the villain ever folding a king? No. Is he folding everything else? Yes. So you just got value owned. Only kings continue, and now the SPR is so low that you've got no room to escape on the river.
This is exactly how players end up stacking themselves to a hand like king five or king eight, then walking away asking how the villain could possibly call with that. He called because of your turn bet. Once he makes that turn call, he's never folding a king on the river.
The Two Mode Trap
Most low stakes players are predictable and easy to exploit because they only have two thought processes. I have value, so I'm piling in the money. Or I'm going for the fold. And both of those modes come with a big bet.
That approach throws away a ton of value on the hands that aren't nutted but would happily keep calling smaller bets. That's where your profit actually comes from.
Got a hand you're not sure about? Drop it in the community and let's talk through it.
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