What is a Probe Bet in Poker?

A probe bet is a postflop bet made by the player who called a raise preflop, when the preflop raiser checks to them on the flop or turn. The key is that the raiser has shown weakness by checking, and the caller can now take the lead with a bet. It's not a bluff—it's often a value bet with a made hand or a semi-bluff with a draw, but its primary purpose is to win the pot right there or to set the price for seeing the next card.

Many players confuse a probe bet with a continuation bet (c-bet). A c-bet is made by the preflop raiser, while a probe bet is made by the preflop caller. The probe bet is a response to the raiser checking, which often signals that the raiser missed the board or is giving up. By betting, the caller can take control of the hand and often win the pot without a showdown.

What a Probe Bet Is and Is Not

A probe bet is a bet made by the preflop caller after the preflop raiser checks. It is not a bluff, though it can be a semi-bluff. It is not a check-raise, and it is not a bet made by the preflop raiser. The probe bet is a way to exploit the raiser's check, which often indicates weakness.

For example, if you call a raise with 9♠8♠ and the flop comes K♦7♣2♥, the raiser checks to you. You can make a probe bet of about half the pot. You might not have the best hand, but you can represent a king or a strong draw, and you can win the pot if the raiser folds. This is a typical probe bet spot.

How to Use a Probe Bet: Sizing and Timing

When you make a probe bet, the size should be smaller than a typical c-bet, usually around about a third to three-quarters pot. This is because you are betting into a range that may be weak, and you want to get folds from hands that missed. A smaller bet also gives you better pot odds if you are semi-bluffing with a draw.

Timing is crucial. Probe bet when the flop is likely to have missed the raiser's range. For example, if the raiser raised from early position and the flop comes 9♠6♦3♣, that flop is more likely to hit a caller's range (which often includes suited connectors and small pairs) than the raiser's range (which is often high cards). So, if the raiser checks, a probe bet can be very effective.

When Not to Probe Bet

Do not probe bet when the flop is very coordinated and likely to have hit the raiser's range. For example, if the raiser raised from the button and the flop comes A♠K♠Q♥, that flop hits the raiser's range hard. If they check, they might be trapping with a strong hand, so a probe bet could be costly.

Also, avoid probe betting against opponents who check-raise frequently. If you know a player likes to check-raise, you should be more cautious with your probe bets, as you might be walking into a trap.

Another spot to avoid is when you have a hand with poor equity and no draw. If you have nothing, a probe bet is essentially a bluff, and it should be used sparingly. Only bluff with a plan, and prefer to probe with hands that have some equity, like overcards or backdoor draws.

How This Line Plays Out

When you make a probe bet, the opponent's response will guide your next move.

• If the opponent folds: You win the pot without a showdown. This is the ideal outcome, and it happens often when the raiser missed the board.
• If the opponent calls: You need to reassess on the next street. If you have a made hand, you can continue betting for value on the turn. If you have a draw, you can check back and take a free card, or bet again if you improve.
• If the opponent raises: This is a strong signal. They are either trapping with a big hand or they are bluff-raising. You should usually fold unless you have a very strong hand or a draw with good equity. If you have a draw, you might continue if the pot odds justify it.

For example, you call a raise with 8♠7♠, and the flop comes J♠5♦2♣. The raiser checks, and you bet 50% pot. If they call, the turn is the 9♠, giving you a flush draw and a straight draw. You can now bet again as a semi-bluff, or check back to see the river. If they raise, you likely fold unless you have a strong draw.

Leaks on This Line

• Probe betting too often: If you probe bet every time the raiser checks, you become predictable. Opponents will start check-raising you with a wide range, and you'll lose money.
• Probe betting with no equity: Betting with hands that have no chance to improve is a pure bluff. While occasional bluffs are fine, doing it too often with no equity is a leak. Prefer to probe with hands that have some backdoor potential or overcards.
• Probe betting too large: Betting too much (like 75% pot) when you have a marginal hand can be costly. You want to risk less to win the pot, so keep your probe bets small.
• Ignoring opponent tendencies: If you know an opponent never folds to a probe bet, you should stop probing and instead check back or bet for value with stronger hands.

Frequently Asked Questions

What is a probe bet in poker?

A probe bet is a postflop bet made by the preflop caller when the preflop raiser checks to them. It's a way to take control of the hand and often wins the pot immediately.

When should I make a probe bet?

Make a probe bet when the flop is likely to have missed the raiser's range, such as on low, disconnected boards. Also, consider the opponent's tendencies and your own hand strength.

How much should I bet on a probe bet?

A typical probe bet is about a third to three-quarters pot on the flop, and a typical fraction on the turn. This size is small enough to be profitable as a semi-bluff and large enough to get folds from weak hands.

Is a probe bet the same as a continuation bet?

No. A continuation bet is made by the preflop raiser, while a probe bet is made by the preflop caller. They are opposite sides of the same postflop situation.

What should I do if my probe bet is raised?

If your probe bet is raised, you should usually fold unless you have a strong hand or a draw with good equity. A raise often indicates a strong hand or a bluff, and you need to weigh the pot odds and your hand's potential.