Here’s how it works—as the name suggests, the RNG has only one function in life and that’s obviously to ‘generate random numbers’. It does this constantly, generating a new set of randomized numbers in a fraction of a second and repeating the process. It does this no matter if the machine is being played or not. This is a subtle, but important distinction, that helps a player understand exactly how a slot. Slot machines are truly random and use a random number generator, the first slot generation was mechanical, think back to coin-operated slots and even those utilised a random number generator most referred to as RNG, to determine the outcomes of the game. Do modern slots at online casinos use a random number generator? Each slot and random number generator part of the slot need to pass rigorous in-house testing as well as a suite of statistical tests created to detect bias. One of many standard tests for is each slot is the measure of its RTP, each slot has a fixed theoretical value of its return to player used as a baseline value. It was a keno machine and he had a certain code put in the slot machine so all he had to do was punch the code in and the numbers would come up. He was caught and I believe he was sent to jail. But he made a statement that there is no such thing as a Random Number Generator! That someone somewhere had to put those numbers in the RNG the first time.

For those who are serious slot players or who love to play slots a lot, then I highly recommend that you understand the relevance and logic of Random Number Generators (RNG).

Too often, I hear from slot players that the game of playing slots requires no strategy. This is far from the truth! Whilst it is impossible to have sustainable and consistent winnings, you can mitigate losses. Now who doesn’t want to lose more money than they have to! Hence it’s vital to at least know the basics of slots.

For those players who play slots occasionally i.e. a social player, say for example when going out with friends and family or playing on the side while attending a major event, then I can completely understand that knowing RNG concepts would be a waste of time. But for other players, you should familiarize yourself with the concept.

Why should I bother understanding slots strategy RNG?

With any game, hobby or passion, it goes without saying that studying the concepts leads to being a better player. And this applies to slot players. The role of Random Number Generators (RNG) in slots is the core principle of determining odds for players. Which, of course, is the whole part of the game for slot players. Understanding the fundamentals of RNG will help reduce losses and will lead to a better playing experience.

How Does A Random Number Generator Work On A Slot Machine

What is the Random Number Generator?

The core principle of slot machines, is to provide a random outcome for slot players – very similar to other casino table games. Take for example the game of blackjack. In blackjack the cards are drawn randomly and the outcome is unknown (not only for the player, but to everyone including dealer).

Since slot machines are machines (stating the obvious) the randomness of the outcome needs to be programmed into the logic of the software.

Creating randomness with a mathematical equation is theoretically impossible, because if you can apply an equation it means you can determine the outcome. However algorithms can be created with the following attributes:

1. There is no repeatable pattern
2. There is a standard deviation such that over a long period of time there is an even distribution of outcomes.

If there is a repeatable pattern, then an outcome can be theoretically determined, this means that there is no randomness to the outcome. If there is no repeatable pattern then the result could be deemed to be random.

If the outcomes are not evenly distributed and the results are skewed in the long term, then this also means there is no randomness.

By fulfilling the attributes of an unrepeatable pattern and an even distribution over the long run, it can appear that randomness is achieved.

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Starting numbers or seeding

All algorithms require a starting number to begin the calculation of randomness. The starting number is referred to as the seed, Naturally if two slot machines are using the same starting number and have the same algorithm applied, then their outcomes will be exactly the same. As the slot machines churn through the numbers you will see that the output between the two machines would be exactly the same. However, without a person comparing the results of the two machines, individually each machine would appear to be generating outcomes randomly.

The starting number can either be chosen on by a fixed logic, such as today’s date. Or it can be based on a true random event such as the radio activity of decaying atoms. Linking a computer software to an external random event can be done, but is more relatively more difficult to build into a system and therefore most systems rely on a fixed logic to select the starting number.

A Random Number Generator is therefore an algorithm generating what appears to be random results. These results have no pattern(s) and in the long term there is an even distribution of outcomes.

RNG and the outcomes for slot machines

In a slot machine, random numbers are continually and consistently being generated, even when no game is being played. The outcomes of the algorithm are always being calculated, thousands per second. These calculations are being performed by the main server in which all the slot machines are connected to.

When a player pushes a button on a machine (which in itself is completely random) the output that was calculated by the main server at that point in time is produced. The results of a win or loss is then determined by the slot machine.

In knowing this, you can then deduce that it is impossible to predict the outcome of playing any slot machine to the second (or rather thousandth of a second). Unless you have the ability to know the algorithm logic and the speed to time pressing the button on a slot machine, it is humanly impossible to land on a determined outcome.

Know the Myths of playing slots

In playing slots it’s often easy to fall into the trap in believing myths about playing slots. Some of these myths refer to how to play the slot machines strategically to maximize your winnings. These myths can be very dangerous to believe in, and could burn through your bank roll very quickly.

Click here to see the Top 5 Myths and Strategies for Slots

Summary

Understanding RNG will help you with strategically playing slots. In knowing how RNG create random outcomes, it’s impossible for anyone to beat the system. Slots is about extending your playing run, and not going for the big win.

Appendix

Readers ask if quick reflexes are the key to winning

By John Grochowski

How Does The Randon Generator On A Slot Machine Work Cited

I keep a list of questions that I’m most often asked about slot machines. You could probably tick off some of them: “Are games programmed to go cold after a big win?” “Do you get less payback when you use your rewards card?” And the big one, “Can you tell me how to win?”

Those have been standards ever since I started writing about casinos and casino games 20 years ago. But recently, another question has been shooting up the charts. I have it all the way up at No. 2 on the readers’ hit parade:

“I’ve noticed on a lot of video slot games that if I hit the button a second time while the reels are spinning, they stop right away. I was wondering if I could use this to my advantage. If I see the bonus triggers or the jackpot symbols at the top, should I quickly hit the button again and try to stop the reels?”

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I had that thought myself the first time I accidentally double-hit a button and saw the reels click to an immediate halt. Could this be an answer to the chart-topping question, “how to win on the slots?”

Unfortunately, it doesn’t work that way. In nearly all slot games that allow you to stop the reels, there is no skill or timing involved on your part. The random number generator has already determined your outcome when you hit the button to spin the reels, and you’re going to get the same result regardless of whether you stop the reels early, or let them halt in their own time.

When you play a slot machine, the game isn’t actually being played out on the reels, whether it uses “real” reels or video reels. It’s being played internally, on the game’s random number generator. The reels are just a player-friendly interface, and are told where to stop by the RNG. If there’s a malfunction and the reel display doesn’t match the numbers generated, it’s the RNG that counts. Large jackpots can be denied—and have been denied—if a check shows the random numbers on the internal computer chip don’t match the winning symbols on the reels.

But this is extremely rare. The engineering is good enough that almost all the time, the RNG and reel display are going to match up. This doesn’t change if you double-hit the bet button. If the RNG has spit out a random number that tells the first reel to stop on a single bar, then you’re going to get a single bar—regardless of whether you hit the button a second time for a “quick stop,” or just let them take their own sweet time.

There are rare exceptions. When I’ve answered similar questions in the past, I’ve mentioned IGT’s Reel Edge games. In their original incarnation, Reel Edge games enabled players to touch and stop the reels one at a time. There was actual skill involved. Your timing in stopping the reels determined the outcome. The reels spun very, very fast, so it was going take a keen eye and sharp reflexes to get better than random results, but it was possible.

I gave it a try, and found my reflexes just weren’t fast enough to generate more than my normal share of winners. In the original three-reel Blood Life game, I identified a green 7 as the easiest symbol to pick out as it whizzed by. I touched each reel individually as I saw a green 7 reach the top of the slot window, and managed to stop 7s on all three reels. Alas, I failed to land them all on the same payline. Some younger folks with quicker reactions may have been able to do better.

I don’t know if any of the first generation of Reel Edge games remain on casino floors. They were never widespread, and I don’t get lists from casinos or manufacturers telling me what games are available in any given casino. The new generation of Reel Edge puts the skill-based portions of the games in the bonus events.

Blood Life’s updated video incarnation, Blood Life Legends, allows you to test your skill with a joystick to guide a bat through the ups, downs, twists and turns of a cave as you try to collect gems for bonuses. There is actual skill involved, but it’s not the reel-stopping experience readers have been asking about.

On most slot games, even in the bonus events you’re getting an illusion of skill rather than actual skill. And when it comes to stopping the reels, it’s the random number generator, not your reflexes, that determines the results.

What about my readers’ other top questions?

To answer another—no, games are not programmed to go cold after big wins. Results remain as random as humans can program a computer to be. As long as the RNG keeps doing its thing, any big jackpot, any hot streak, and any cold streak eventually fade away into statistical insignificance, and the machine comes very close to its expected payback percentage.

No, you don’t get less payback when you use your rewards card. The player rewards system doesn’t interact with the RNG.

And no, with rare exceptions, there is no way to beat the slots except by being in the right place at the right time. There have been opportunities for small profit on games with banked bonuses such as the old WMS game Piggy Bankin’, where the sharpies would start to play only when there were enough coins in the bank to give the player an edge.

Such games are not common. Just as with stopping the reels early, your results are up to chance and the RNG.