How to defend your big blind

Why the big blind is special

The big blind is the only seat that has already paid a full bet before seeing its cards. That changes everything:

• You get a discount. Part of the call is already in the pot.
• You close the action. Nobody can raise behind you once you call.
• You play out of position after the flop against almost everyone.

The discount means you should defend far more hands than you would play from any other seat. Being out of position means you should not defend everything.

Pot odds: the price you are getting

Pot odds tell you how often you need to win to break even. The formula is amount to call ÷ (pot after the bet + amount to call). With blinds of 0.5bb and 1bb and no antes:

Against a min-raise you need only about one win in five. Against a 2.5x open, a little over one in four. With antes in the pot, as in most tournaments, the price is even better and you can defend wider still. Try other sizes in our pot odds calculator.

Raw equity is not the whole story

Out of position, you will not always reach showdown to collect your equity. You face c-bets, you check and fold, and you win smaller pots with your good hands. So a hand needs comfortably more than the bare minimum to call. Hands that flop well and play easily realise their equity best. Weak offsuit hands realise it worst.

Compare 8♠ 7♠ with K♠ 3♦. The suited connector can flop flushes, straights, draws and two pair, and it rarely makes a second-best hand. K♠ 3♦ often flops a king with a weak kicker, which loses a big pot to any better king. Even with similar raw equity, the suited connector is the clear defend.

Which hands to defend

How wide you go depends on who opened. Early-position openers have strong ranges. Button openers have wide ones.

Against a button or cutoff open

Defend widely:

• All pocket pairs, from pocket twos upwards.
• Almost all suited hands, including suited connectors and one-gappers like 8♠ 6♠.
• Offsuit broadways and connectors such as K♦ T♣, Q♥ J♠ and 9♣ 8♦.

Against an early-position open

Tighten up:

• Pocket pairs, suited aces, suited broadways and good suited connectors.
• Fold weak offsuit hands such as K♠ 7♦ and J♣ 5♥. They are dominated and hard to play.

When to 3-bet instead

Re-raise with your strongest hands and a few bluffs, especially against late-position openers who fold too often. Suited aces like A♥ 4♥ are good candidates. Out of position, make it about 4x the open. Our 3-bet strategy guide has the details.

Playing the flop from the big blind

You will check first on most flops. That is fine. The skill is in what you do when your opponent bets.

Facing a small c-bet

Say the button opened to 2.5bb, you called and the pot is 5.5bb. The flop is K♦ 7♣ 2♥ and the button bets 1.8bb. You need 1.8 ÷ 9.1, about 20% equity. Hands with any pair, a gutshot or two overcards often have enough to continue.

Facing a bigger c-bet

If the button bets the full pot of 5.5bb instead, you need 5.5 ÷ 16.5, about 33% equity. Now weak pairs and gutshots should usually fold, while top pair, good draws and strong second pairs continue. The bigger the bet, the stronger your continuing range needs to be.

Check-raising

A check-raise is your main weapon out of position. Use it with strong hands like two pair and sets, and with good draws such as flush draws and open-enders. It wins pots immediately and stops the opener from c-betting freely.

Leading out

A donk bet, betting into the preflop raiser, is rarely needed. It can work on low, connected boards like 6♥ 5♥ 4♣ that suit your range better than the opener’s. Most of the time, checking and letting the opener bet into you is simpler and works better.

Turn and river

When you call a flop c-bet, many openers give up on the turn. If they check behind, you can often bet the river with hands that improved or that have little showdown value. If they keep betting big on the turn and river, fold your weakest pairs unless you have a read that they bluff often.

Tournament and short-stack adjustments

• Antes widen your range because the pot is bigger before you act.
• Short stacks around 15bb or less often 3-bet all-in or fold rather than call and play the flop.
• Near the bubble, ICM pressure means calling off your stack needs stronger hands.
• Big stacks opening into you often raise very wide near the bubble. Look for spots to 3-bet strong hands rather than just calling.

Common big blind mistakes

• Folding too much. Giving up your blind against every button raise is a slow leak.
• Defending every hand. 7♣ 2♦ might have about 34.5% against one random hand, but against an opening range, out of position, it plays very badly.
• Calling and then folding every flop. If you defend, plan to fight back sometimes.
• Never 3-betting. Pure calling makes your range easy to read.
• Ignoring the open size. A min-raise and a 4x raise call for very different defending ranges.

Quick checklist

What is the open size? Which position opened? Does my hand flop well? Should I call, 3-bet or fold? What is my plan on the flop? Five questions, and your big blind stops being a chip leak.