Preflop Fundamentals: Part 2

A 3bet is a reraise over someone's open. When player A raises and player B re-raises, that is a 3bet (the blind posts count as bet 1, the open as bet 2, and the reraise as bet 3). 3betting is one of the highest-leverage plays in preflop strategy. Done correctly, it generates enormous fold equity and builds massive pots with strong hands. Done poorly, it creates inflated pots with hands that cannot handle the pressure.

Quick Take

• 3bets win by folding out equity, building pots with value, and shaping SPR.
• Good value 3bets want action; good bluff 3bets have blockers or playability.
• In position, calling and 3betting often compete with each other.
• Low-SPR 3bet pots punish players who keep using deep-stack logic.

What a 3bet Is and Why It Matters

A 3bet accomplishes several things simultaneously:

• Denies equity to calling ranges by charging them to continue
• Claims fold equity because many opens fold to 3bets
• Builds the pot when you have a strong hand that wants to play for stacks
• Shapes the postflop texture because 3bet pots have fewer callers and larger pots relative to stacks, changing the SPR

The 3bettor always wants a clear plan for postflop: either a hand strong enough to play for stacks (value 3bet) or a hand that can profitably use fold equity and has some realization if called (bluff 3bet).

Value 3bet Candidates

A value 3bet is made with hands strong enough to want opponents to call and put in more money. The threshold for value 3betting depends on position and opponent tendencies, but GTO baselines roughly look like:

• Clear value at most positions: AA, KK, QQ, AKs, AKo
• Value in position: JJ, TT, AQs (called or 4bet, both situations are acceptable)
• Marginal value: AQo, JJ from OOP against a late-position open (may be better as a call)

The goal of a value 3bet is to build the pot while ahead. If you 3bet QQ and get called by JJ, you are ahead and happy to play a large pot. If you get 4bet, you face a decision: QQ and KK will call; AA never folds.

Bluff 3bet Candidates

Bluff 3bets, also called light 3bets, add hands to your 3betting range that are not pure value but still have desirable properties:

• Blockers: Hands that contain an Ace or King reduce the probability that opponents hold AA or AK, their most common 4bet hands. A5s blocks AA combos and plays reasonably well postflop when called. A2s-A4s at lower SPR are common bluff 3bet hands because they block the value range.
• Playability when called: Pure air does not make a good light 3bet because if called, you are out of position with nothing. Suited connectors (98s, 87s) and suited aces have the ability to make strong hands on favorable flops, giving you options postflop.
• Not a hand you want to call with: Suited hands that are marginal calls make better 3bet bluffs. By 3betting, you generate fold equity on top of the hand's equity. Calling with the same hand gives you only equity and no fold equity.

Calling vs 3betting In Position

In position (IP), you have a choice between calling and 3betting with many hands. This is often called the "squeeze vs. flat" decision. GTO solutions typically suggest:

• 3bet with your strongest value hands and selected bluff 3bets
• Call with hands that play well postflop and can realize equity (JTs, KQs, medium pairs)
• Fold hands with insufficient equity or playability

The position-specific variant: hands that are pure folds from OOP can be profitable calls from IP. 76s from the BB against a BTN open is marginal; from the CO against a HJ open, it is likely a call.

Calling 3bets (cold calling) in position with medium-strength hands is often correct. KQs vs. a BTN 3bet from the CO is a call in many configurations. Folding gives up too much equity, and 4betting turns the hand into a bluff.

3bet Pot Play Overview

Once a 3bet is called, the pot is large relative to remaining stacks. A 3bet to 9bb from a 3bb open, called, sends the pot into the flop at about 20bb. At 100bb starting stacks, there are roughly 80bb left, which is an SPR of approximately 4. At this SPR:

• Sets and strong two-pair want to get stacks in by the river
• Top pair top kicker is a strong hand but is not always stack-off material at SPR 4
• Draws play differently because there is less room to call flop and fold turn profitably

Understanding that 3bet pots have lower SPR is critical. Many players lose money in 3bet pots because they apply 100bb deep postflop logic (pot control, thin value) to situations where the correct play is to commit stacks.

Common 3bet Mistakes

Over-3betting: Adding too many bluff 3bets without balancing your range. If you 3bet 20% of hands, opponents need to call with wide ranges, and your bluffs will get called more often.

Under-3betting for value: Never 3betting QQ or AKs against a steal because "they might 4bet." The purpose of value 3bets is to get value. If opponents 4bet, you can make decisions then. Giving up fold equity by just calling AA reduces its EV significantly.

3betting OOP without a plan: 3betting 87s from the SB against a CO open creates a 3bet pot where you are OOP with 80bb behind. You need a clear plan for common flop textures. Most of the time you are check-folding or check-calling, which limits your fold equity.

Mechanical 3betting: 3betting AA every single time from every position with the same sizing. GTO sometimes mixes in a call with AA (particularly in position) to balance the flatting range. Pure-always-3bet with AA is exploitable.

Summary

• A 3bet is a reraise over an open. It claims fold equity, builds the pot, and shapes postflop structure.
• Value 3bets: AA, KK, QQ, AKs are universal; JJ, TT, AQs are position-dependent.
• Bluff 3bets: use hands with blockers (A-x suited) and playability (suited connectors).
• In position, you can call 3bets with medium hands that realize equity postflop.
• 3bet pots have lower SPR. Play more committed postflop, not less.