PREFLOP · FIELD NOTE
The Button 3-Bet Your Cutoff Open. How Wide Should You Defend?
How to choose calls, 4-bets, and folds after the button 3-bets your cutoff open—and avoid defending just because you raised first.
You open the cutoff and the button 3-bets. It is annoying because you know the button can be wide, but you will also be out of position for the rest of the hand. This is where pride quietly turns marginal opens into expensive calls.
The short answer
Fold the weakest part of your opening range. Call hands that can realize their equity out of position. 4-bet your strongest hands plus a small number of blocker bluffs. The larger the 3-bet, the fewer hands you should call.
Three useful words
Out of position means you act first after the flop. Domination is the trouble you face when both players pair the same rank but your kicker is worse. A 4-bet is the next raise after a 3-bet.
Practice this spot first
Ace-queen suited can call well and also blocks premium hands, so more than one action may work. Pick call or 4-bet, then say which part of your overall range that choice protects.
Defend a range, not your ego
Opening does not obligate you to continue. The weakest offsuit opens often fold. Medium pairs, suited broadways, and strong suited connectors can call when the price and postflop realization support them. Premiums and selected blockers build the 4-bet range.
Track the percentage of your opening range that continues. If too little survives, a button can 3-bet any two cards. If too much survives, you enter large out-of-position pots with dominated hands.
Let size reshape the response
A small 3-bet gives calls a better price and leaves a higher SPR. A large size folds out marginal continues and pushes stronger hands toward 4-bet or fold. Do not apply a chart built for 7.5bb against a 10bb size.
At shorter stacks, calling loses room and all-in branches become more common. Deep stacks improve implied odds for suited hands but increase reverse implied odds with dominated top pairs.
Construct value and bluff 4-bets together
Value hands want action from worse or have enough equity against a 5-bet. Bluff 4-bets prefer blockers and limited calling value. Suited ace-x frequently fits because it removes aces and ace-king while retaining equity.
Ace-queen suited is different: it may call profitably and can be too valuable to convert entirely into a bluff. Mixed actions protect both ranges.
Prepare for out-of-position postflop play
The cutoff checks frequently after calling. On low boards, the caller retains pairs and suited connectors; on ace- and king-high boards, the button’s 3-bet range often has the advantage. Plan which boards support check-calls, check-raises, and leads before choosing a marginal preflop call.
Rule of thumb: Your cutoff defense is successful when its calls can realize, its 4-bets can withstand a response, and its folds lose less than the alternatives.
Keep studying
See the aggressor’s side in the button-versus-cutoff strategy tree, then work through how pocket jacks choose between calling and 4-betting. If the action escalates again, use the value-first method for constructing 5-bet shoves.