What you need to know about the gap theory in Roulette

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Roulette is the most popular and most-played casino game in the world. The game is entertaining and straightforward, plus you do not necessarily need a huge bet to play. Because of how easy it is to play the game of roulette, many casino players around the world have devised strategies and theories of playing the game to increase their chances of winning. Among these numerous theories is the gap theory.

The wheels of the roulette are a division of slots, and each slot is numbered methodically from 1 to 36 while the number 0 is for the green division. Meanwhile, American roulette tables have a second green division numbered 00. The results of the game depends on how the wheel spins. Some numbers might appear more than once, while others might not even appear.

Continue reading to discover all there is to know about the roulette Gap theory.

So what is a gap in american roulette?

A gap in roulette is how long it takes a number to hit the roulette wheel again. Practically, if the number 10 hits on spin #2, and the same number 10 hits the wheel again on spin #38, the gap between the hits is 36 (38-2). Again, if number 30 hits the wheel on spin #12, and again on spin #28, the gap between the hits is 16(28-12). A gap is simply the number of spins between hits of the same number on the roulette wheel.

Roulette number sequence.

The game of Roulette isn’t completely random, and most roulette players expect a certain number that hasn’t won in a while to win soon. Many roulette players believe that they can determine the winning numbers by just looking at the numbers that have already won the previous spins. Learn how to predict the roulette game here

However, the results of a spin in roulette are an independent event and highly random, because roulette does not store the results of the former games.

Repeating numbers

The probability of a number winning twice in a row in a roulette game is 1/38 × 1/38 = 1/1444, or due to solitary probabilities. An example is the number 12. For the number 12 to win twice, the probability is 1/38 × 1/38 = 1/1,444. Again, when it comes to the probability of the same number winning three times, the probability is 1/38 × 1/38 × 1/38 = 1/54,872. This means that the probability for the number 12 to win three times is 1/54,872. The overall chance for a number to win four times in a roulette game is 1/38 × 1/38 × 1/38 × 1/38 = 1/ 2, 085,136. This is to say that the probability of the number 12 winning 4 times is 1/ 2,085,136.

gap theory in Roulette

This probability is very low and has made most players conclude that for a number to win four times, it has to contend with extraordinary odds. But this is not because the first three spins of the roulette wheel can overcome the odds. Your first three roulette spins have a probability of 1/54,872 this means that the number has to overcome the 1/38 probability to win on your fourth spin. If the number wins the fourth spin, the probability of all four spins is still 1/ 2,085, 135, because 1/54,872 which is the probability of your first three spins × 1/38 which is the probability of your fourth spin = 1/ 2,085,136.

However, the chances for a number to hit again decrease more after each previous hit.

Roulette Bets and Betting Patterns

Most professional roulette players prefer to add different betting combinations or patterns to increase their chances of winning and reduce the risk of losing their bankrolls early. Betting patterns can greatly help reduce the risk that comes with playing roulette.

To succeed at the roulette table, the most important ingredients you need are; how much to bet and what number combinations to wager on. Here are some bet patterns that can help you win:

Recognize sleeping patterns

Hedge betting (This means you are placing bets that complement each other so that you can achieve the perfect balance between your risk and potential winning)

Hedge betting on the dozen (Here, you use the hedge pattern while betting on the Dozens)

Betting on even chances

Betting on action numbers like numbers 10-15.

Red betting system

Covering the wheel sections with call bets (This pattern is used mostly in French and European roulette because the wheel variation is different from that of American roulette).

Number sequences

Most times, roulette betting techniques recommend placing bets on groups of numbers adjacent to each other on the roulette wheel head. This is why wheel manufacturers created wheels where roulette players will need to scatter their betting chips while betting, making it impossible for them to continue wagering on contiguous sectors.

For example, if you feel like number 8 will win the current spin, but you are not sure if it will win in the next spin. In this case, you can decide to settle on placing a neighbor wager that consists of the number 8, and four numbers adjacent to it like numbers 14 and 23 to the right, and numbers 25 and 34 to the left. Hence, five of your casino chips should be placed on each of these five numbers.

Alternatively, you can use these methods:

Orphelins wagers: This wager covers 8 numbers in total, these numbers are 6,34,17 which are located at one section of the wheel and are adjacent. The other five numbers are 1,20,14,31, and 9, are located at a different section of the wheel.

Voisins du Zéro: This wager covers 17 adjacent numbers. These numbers are 22, 18, 7, 29, 28,12,3,35,26,0,32,15,19,21,4,2, and 25.

Tiers du Cylindre: This wager covers 12 numbers, which are 33,16, 24,5,10,23,8,30,11,36,13, and 27.

Number spans

Looking into the American roulette, the most common combination of contiguous wagers is concentrated in the center column.

For example, the center column wager includes a period range of 15 numbers, that comprises approximately ⅖ of the ring’s circumference. Then, the range of numbers from 13 to 32 on the wheel moving clockwise have gaps of 0,5,9,26, and 34. Also, two extra numbers 6 and 31 remain beyond this range.

This wager is usually placed in the following ways:

Column and Straight-up: Here, the player can place one chip in each of these numbers; 0, 7, 9, 28, and 30. Players can also place a stack of at least four or more chips in the center column.

Center column: You can decide to wager on the center column, with the hope that the roulette ball doesn’t stop on any of the five gaps.

Column and Street: In this wager, you can put one chip on the row that covers the numbers 7, 8, and 9, and another chip on the row that covers 28, 29, and 30. Then, you can put two chips or more in the center column.

Street Bet: The street Bet has two combinations, which professional players use often since it covers eight number spans.

The first span of the street bet stretches from 25 – 4 and includes four street bets – one bet on 4, 5, 6, another one on 16, 17, 18, another bet on 25, 26, 27, and the last one on 31, 32, 33. Do well to remember that the opposite side of the wheel also includes a secondary range of numbers, namely 20, 29, 14, and 5.

The second span of the street bet is the street and split bet, it stretches from 16 to 7. This bet includes one street wager on 7, 8, and 9 and another street wager on 28, 29, 30, and two split wagers; one on 13-16, and the other on 15-18. Two numbers will remain outside the major spa, the numbers 35 and 2.

Law of the third in roulette

The Law of the third in the game of roulette is a playing technique that is based completely on mathematically proven facts.

What is the Law of the Third?

The Law of the Third is a technique in gap roulette, which is based on mathematical facts. This law states that some numbers would not emerge after a specific number of spins. Although the roulette wheel spins in full revolution, it doesn’t necessarily mean that the ball will land evenly on each pocket.

How to play the Law of the Third: A guide

Below is a step-by-step guide on how you can play the Law of the Third:

Pick a position at the roulette table and buy chips. You don’t necessarily have to bet on every spin

Take note of how many spins it takes for the wheel to get 9 different numbers.

Wait for another spin before collecting your chips, and prepare to bet on the 9 different numbers you have seen.

Make a single unit bet on those 8 numbers for the next three spins.

By the time everything is steady, a number will appear a second time, and you will get paid 35 to 1, losing a total of 27 units in the process. As you won’t be betting on that number, you will have extra 9 units. Then, you will have the opportunity to win a third of the 27 units you risked, which is the Law of the Third.

If this is the case, you will hit another number and win 45 chips in return. If luck is on your side, each of your three spins will be repeated by one of the numbers, and you will receive 81 chips. If this happens, you will have chips enough for three full playing sessions.

What are the odds of a number repeating in a roulette game?

The probability of one number odds roulette happening is 1/38 in American roulette , and 1/37 in French roulette . It is visible from the above odds that it’s a great coincidence for the same number to appear two times in a row.

The longest consistent appearance of a number in roulette was in June 1959, when the number 10 appeared six times in a row. The probability of the same number appearing six times in American roulette is:

1/38 × 1/38 × 1/38 × 1/38 × 1/38 × 1/38 = 0.000000000332122593261671.

It’s a different case for every spin. For instance, if the number 20 wins a spin, what is the probability of the number 20 winning again? Numbers with the same probability (1/37 in French roulette, and 1/38 in American roulette) have a chance to win in every spin.


In this section, we provide answers to some of the most asked questions about the Gap theory in roulette.

Can I win more money playing roulette using the gap theory?

Yes, if you bet using the gap theory and the different strategies we have talked about, you increase your chances of winning. However, make sure you play the roulette with money you can afford to use, because you can never predict the outcome of every spin.

What is the most common winning number in roulette?

Like most other gambling games, the number 7 red is the most common winning number in roulette.

How often does a number come up in Roulette?

Depending on the type of roulette you are playing. In American roulette, a number comes up about 1/38 times, and on French and European roulette, it comes up 1/37 times.


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