A bluff catcher is a hand that beats only your opponent’s bluffs, not their value bets. You call with it to stop the opponent from bluffing profitably, choosing the ones that block their value.
On a polarized river, most of your calling range is bluff catchers — hands like a middling pair that beat air but lose to any value. Your job is to call enough of them to meet the MDF, and to pick the specific combos that block the opponent’s value hands and unblock their bluffs.
Against balanced opponents a bluff catcher is a break-even call by design. The profit comes from exploitation: fold more of them versus players who under-bluff, and call them all down versus players who bluff too much.
Choosing which bluff-catchers continue is where blockers matter. A good bluff-catcher holds cards from villain’s value hands and does not hold cards from his bluffs, which are usually missed draws. On K♥8♦3♣2♠5♥ facing a pot-sized bet, A♥9♥ beats every missed 7-6, Q-J and J-T, and its ace removes A-K, his most common value hand. Compare A♥T♥ on K♠Q♦8♣5♥2♠ facing 8 into 16: the ten is a card from his missed J-T, and ace-high loses to every pair — fold. Never raise a bluff-catcher: a raise folds out the bluffs it beats and is called only by the value hands it loses to.
Worked example
FAQ
How do you pick which bluff catchers to call?
Prefer combos that block the opponent’s value hands and don’t block their bluffs — that makes it likelier you’re facing a bluff and less likely they hold a call.
Is calling a bluff catcher profitable?
Against a balanced bettor it’s break-even by design. It becomes profitable when the opponent bluffs too often, and a fold when they rarely bluff.