Postflop Coach — free heads-up postflop poker trainer中文 · 日本語 · Deutsch

River Defense vs Big Bets

Lesson 24 · Triple barrels, overbets, and polarized lines · 42 practice questions

Defending big river bets

A big river bet is polarized: villain is saying he has either a very strong hand or nothing. Against such a range all your medium hands are worth the same — they beat every bluff and lose to every value hand — so they are called bluff-catchers, and the question is only how often he bluffs compared with the price. Half pot asks for 25% and MDF is 67%; two-thirds pot asks for 29% and 60%; a pot-sized bet asks for 33% and 50%; a 1.5x overbet asks for 38% and 40%. The bigger the bet, the fewer hands you need to call, so you keep the best bluff-catchers and let the worst go. Missed draws and ace-high without a good reason sit below that line at almost every size.

Example. River K♦9♠5♥3♣2♦: villain bets 12 into 18 and you hold K♣J♣. You need 12/(18+12+12) = 29%, and top pair with a good kicker is near the top of your bluff-catchers: call. Same price on A♠K♦8♣5♥2♠ with 8♥7♥: third pair is at the bottom of your range and you have many better hands to defend with — fold. When the bet grows, the line moves up: with J♣T♣ on A♠J♦9♥5♣2♦ facing 21 into 16 you need 36%, and second pair is no longer good enough — fold.

Common mistake: deciding by the absolute strength of the hand ('I have a pair'). Against a polarized bet, decide by where the hand ranks among your own bluff-catchers, and by the price.

Blockers for calls

When several bluff-catchers are equally strong against a polarized range, blockers break the tie. A good bluff-catcher holds cards that villain needs for his value hands — so he has value less often — and does not hold the cards that his bluffs are made of, which are usually the missed draws. On an ace-high board an ace in your hand removes many of his top-pair and two-pair combinations. On a board where straight draws missed, holding the cards of those draws is bad: you are blocking exactly the hands you want him to have. Blockers never turn a bad call into a good one by themselves; they choose between hands that are already close.

Example. River K♥8♦3♣2♠5♥ after you called two barrels: villain bets 30 into 30 and you hold A♥9♥. You need 33%. His bluffs are missed hands like 7-6, Q-J and J-T; ace-high beats all of them, and your ace removes A-K, his most common value hand: calling is fine, and so is folding, because you also hold plenty of kings to defend with. On T♥7♦4♠9♣2♥ with A♥K♥ facing 20 into 30 (need 29%) the point is the other half: ace-king holds none of the cards from J-8, 8-6 or 6-5, so every busted draw is still in his range — a reasonable call. 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.

Common mistake: calling because 'I block the nuts' while also blocking his bluffs. Count both sides: what you remove from his value, and what you remove from his air.

Fold vs aggression

The line matters as much as the last bet. A player who bets flop, turn and river for large sizes has had three chances to give up his bluffs, and most players do give up; what arrives on the river with a pot-sized bet is value far more often than theory requires. So against a triple barrel of big bets, one pair — even top pair top kicker — is a bluff-catcher near the fold line, and folding is the standard play. The reverse also holds. When you hold a hand that beats his value range, a big river bet is good news: raise, because a polarized range that contains sets and two pair will pay. And after calling two streets out of position with a weak top pair, check the river: he bluffs with the hands that would have folded to your bet.

Example. River A♠7♦2♣5♥3♠: villain fires a third pot-sized barrel, 48 into 48, and you hold A♥K♦. You need 33%. Against most players this line is two pair or better: folding is standard and calling is close at best. On J♠8♦3♣2♥5♠ with J♥T♣ facing 44 into 44 after he check-raised the flop and barreled the turn, the same. But with Q♣Q♠ on Q♥J♦9♠4♣2♥ facing 27 into 40 you hold top set: raise for value. And with K♥5♥ on K♦T♠7♣3♥2♦ after calling two barrels (pot 30, first to act): check — better kings call any bet and missed draws fold to it, so the only way this hand gets paid is by catching a bluff.

Common mistake: paying off the third barrel because 'I called two streets already'. The money already in the pot is part of the price, not a reason.

Key takeaways

• Top pair with a good kicker or an overpair facing half to two-thirds pot (need 25% to 29%) → call.
• Third pair, ace-high or a missed draw facing a river bet → fold; you have better hands to defend with.
• Pot-sized third barrel (need 33%) with one pair → folding is standard; if you call, pick hands that block his value and not his bluffs.
• Overbet of 1.3x to 1.5x pot (need 36% to 38%) with second pair or ace-high → fold.
• Set, nut straight or better facing a river bet → raise for value.

Sample drill from this lesson

FAQ

Key terms in this lesson

MDF (Minimum Defense Frequency) · Range (Poker Hand Range) · Position (IP vs OOP) · Polarized Range · Bluff Catcher · Barrel (Second and Third Barrel) · Check-Raise · Blockers · Overbet

All 29 lessons