What is a Gutshot in Poker? The Probability of Making a Straight by the River

The poker term “gutshot” is a poker term describing a hand that is one card away from completing a straight.

Knowing its meaning and the probability of making a straight is useful not only when reading or listening to strategy explanations, but also when thinking through your own actions.

This article explains the meaning of “gutshot” in poker, the probability of completing a straight, and more. Please read to the end.

What is a “Gutshot” in Poker?

A poker “gutshot” is a poker term referring to a state where you need just one more card to complete a straight, and that one card is a middle number.

It is also called a “gutshot straight draw” or “inside straight draw.”

There are alternative names and related terms for gutshot, so let’s learn them together.

Alternative Names and Related Terms for the Poker Gutshot

In addition to being called a ‘gutshot straight draw’ or ‘inside straight draw,’ there are several types depending on the hand content.

Here we introduce the alternative names and related terms for gutshot.

Straight Draw

“Straight draw” refers to a draw situation where one more card completes a straight.

“Draw” in poker is an English-derived term meaning to draw a card, referring to a state where several cards must still be drawn to complete a hand (role). It is also called a “draw hand.”

Therefore, a gutshot is also a type of straight draw.Additionally, when one more card completes a flush, it is called a “flush draw.”

Inside Straight Draw

The poker gutshot is also known as an “inside straight draw.”

It helps to remember it as “the inside (middle) number is missing” in a straight draw state.

Outside Straight Draw (Open-Ended Straight Draw)

The opposite of an inside straight draw — when the “outside (both ends)” numbers are missing — is called an “outside straight draw,” commonly known as an “open-ended straight draw.”

In an open-ended straight draw (outside straight draw), four numbers are already consecutive, and a straight is completed if the card before or after arrives.

It is not a term used frequently, but knowing it will allow you to enjoy poker more.

Double Gutshot (Double Belly Buster)

Rarely, there are cases where two types of gutshots can be formed. This type of hand is called a “double gutshot (double belly buster).”

In the image above, a straight is completed if either an 8 or a Q appears — a high-expectation hand.

If both an 8 and a Q were to appear, the higher-numbered straight of 9, 10, J, Q, K takes priority.

Gutshot Probabilities in Poker

Here we introduce gutshot and its probabilities.

• Probability of a middle connector becoming a gutshot
• Probability of a middle connector becoming open-ended
• Probability of a gutshot completing a straight

Probability of a Middle Connector Becoming a Gutshot

When the starting hand is a middle connector, the probability of a gutshot being made on the flop is approximately 16.8%.

Also, the probability of a middle connector making a straight on the flop is approximately 1.3%.

Probability of a Middle Connector Becoming Open-Ended

The probability of an open-ended straight draw — where four numbers are consecutive — being made is approximately 9%.

When you have a middle connector or suited connector hand, it is dangerous to raise just because the expected value is high.

You need to adjust your actions based on your position.For more on positions, refer to the article “What Are Poker Positions? Explaining Turn Order and Advantageous Play Methods with Starting Hands.”

Probability of a Gutshot Completing a Straight

The poker “gutshot” has high expected value, but it is a harder hand compared to an “open-ended straight draw.”

This is because a “gutshot” requires drawing the missing middle number with pinpoint precision.

The probability of a gutshot becoming a straight by the river is 8% with one chance, 16% with two chances.

Depending on the situation, consider folding as well.

A Gutshot Is One Card Away from a Straight — It’s Worth Going for It!

The poker “gutshot,” also known as an inside straight draw, is a term referring to a state where you are one card away from completing a straight.

If the missing card is a middle one, it is a gutshot — but if it is on either end, it is called an open-ended straight draw (outside straight draw). Also, when two types of gutshots are possible, it is called a ‘double gutshot.’

The probability of drawing the out from a gutshot to make a straight is 8%–16%, so it may be worth going for it depending on the situation of both you and your opponent.

Winning with a gutshot can deal a major psychological blow to other players — that is the strength of the gutshot.

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