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When to 3-Bet in Poker: Ranges, Sizing and Spots

Three-betting is where most of the money is won and lost before the flop. The hard part is not the hands you obviously re-raise — it is the ones just below them.

What a 3-bet is

The counting confuses everyone once. Preflop, the big blind is treated as the first bet. Someone raising it is making the second bet — an open. A re-raise over that open is the third bet, the 3-bet. Re-raising a 3-bet is a 4-bet. After the flop, where nobody has posted a forced bet, a bet is the first and a raise is the 2-bet, so the first re-raise on a flop is the 3-bet.

Why it matters more than any other preflop decision: a 3-bet does three things at once. It builds a pot when you have the better hand, it denies the opener the cheap flop they wanted, and it takes the initiative into the flop. Calling gets you none of those. That is the consequence — the ranges below are just the mechanism.

Value 3-bets and bluff 3-bets

Every 3-bet is one of two things, and knowing which one you are making answers most follow-up questions.

Value 3-bets

A value 3-bet is a hand that is happy to be called, because it is ahead of the hands that will call it. Premium pairs and strong aces. The purpose is simple: get more money in while you are in front. These hands also handle a 4-bet, so you are not afraid of the raise coming back.

Bluff 3-bets

A bluff 3-bet (often called a light 3-bet) is a hand that wants a fold now but can still win if called. Good candidates share three traits:

• Blockers. A hand holding an ace or a king makes it less likely your opponent holds the premium hands that 4-bet you. A5s blocks AA and AK; K9s blocks KK and AK.
• Playability. Suited hands that make flushes and straights can continue after the flop. Offsuit junk cannot, which is why 92o is never a 3-bet bluff regardless of how often the opener folds.
• It was not already a comfortable call. The hands you turn into bluffs should be hands that calling does not handle well. Using a hand that calls profitably as a bluff costs you the better option.

The reason you need bluffs at all is readability. A 3-betting range of only QQ+ and AK is trivial to play against: opponents fold everything that loses to it and stack you with the rest. The bluffs are what make your value hands profitable.

What to 3-bet against an open, by position

The table below is a conservative standard for 6-max cash with 100 big blind stacks — close to published beginner-friendly ranges, deliberately on the tight side of solver output so it is simple to remember and hard to punish. Seats: UTG (under the gun, first to act), MP (middle position, sometimes called lojack or hijack), CO (cutoff), BTN (button), SB (small blind), BB (big blind). The s means suited, o means offsuit.

Two patterns run through the whole table. The later they opened, the wider you 3-bet, because a button open contains far more weak hands than an under-the-gun open. And from the blinds you 3-bet more than you would from a seat in between, because calling out of position with a marginal hand is the worst of the three options — you will be acting first on every street.

Everything outside these ranges either folds or calls. From the big blind, calling is a large part of your strategy because you are already partly invested and getting a good price. From the small blind, calling is much less attractive and the range tilts towards 3-bet-or-fold. For the full grids and how to drill them, see the preflop charts, the button range and how to use preflop charts.

Sizing in and out of position

Position here means whether you act after your opponent on later streets. You have position on the opener if you are seated to their left.

Why bigger out of position? You are about to play a pot where your opponent sees your action before making theirs on every street. That is a real disadvantage, and the compensation is charging more now — a larger 3-bet folds out more of their range and builds a pot you are more likely to win immediately. In position you can afford to keep more hands in, because you will play the flop, turn and river with an edge.

Use one size for your whole 3-betting range in a given spot. Sizing big with premiums and small with bluffs is the most common readable tell among improving players, and good opponents will notice it within an hour.

How to respond when you get 3-bet

The default is uncomfortable but correct: fold most of your opening range. You opened with a wide set of hands and someone has told you they hold a narrow one. Sorting your response into three buckets:

• 4-bet. Your strongest hands — QQ+ and AK from an early open, a little wider if you opened the button — plus a small number of bluffs with blockers, typically suited aces. Size to about 2.2× their 3-bet in position, 2.5× out of position.
• Call. Hands that play well against a strong, narrow range and can handle a big pot relative to stacks: JJ–TT, AQs, AJs, KQs, and suited hands that make strong flops. Fewer hands than you think.
• Fold. Everything else, including hands that feel too good to fold — AJo, KQo, small pairs from early position. A 3-bet makes the pot large compared with what is left behind, and that is exactly the condition in which marginal hands lose money.

Position flips the balance. If the 3-bet came from a player you will act after, you can continue with more hands. If it came from the blinds and you will be out of position, tighten.

Common mistakes

• 3-betting only premiums. The most widespread leak. Easy to play against and it wastes the pressure your position gives you.
• Using offsuit junk as bluffs. The value of a bluff 3-bet is partly in what happens when it gets called. 83o has no plan after the flop; 76s does.
• 3-betting small pairs against one opener. 22–66 want a cheap flop and a big payoff when they flop a set. Three-betting turns them into hands that fold to a 4-bet and miss most flops.
• One size for position, a different size for strength. Vary sizing with position, never with your hand.
• Calling too much after being 3-bet. It feels safer than folding. It is not — the pot-to-stack ratio is now working against your marginal hands.
• Widening against a nit. Against a player who only opens strong hands from everywhere, 3-bet bluffs have nothing to fold out. Tighten to value and let them open into you.
• Forgetting the short stacks. With 40 big blinds behind, a 3-bet is most of a commitment. Bluffs shrink and value widens as stacks get shorter.

Do it in Zayrion

Ranges are easy to read and hard to execute at speed. Zayrion deals you real solver-solved 3-bet spots from 6-max cash games, you pick raise, call or fold, and the app shows the solver’s answer, what your choice cost in big blinds, your equity and the hands you beat.

• Learn one seat at a time: the in-app preflop charts cover each seat’s opening, 3-betting and defending ranges. Drill the button against the cutoff first — it is the spot that comes up most.
• Find the seats you get wrong: drills are built from your own misses, so if your small-blind 3-betting is the leak, that is what you get served.
• See the exact frequencies: Elite shows exact frequencies and a strategy grid, so you can see the hands the solver 3-bets only part of the time instead of guessing where the line sits.
• Start free: Hand of the Day and the lessons from zero are on the free tier. Pro is $12.49/mo at the founding-beta price (normally $24.99); Elite is $17.49 (normally $34.99).

Educational only. No real-money play. 18+. On Google Play now; iPhone coming soon.

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