I’m always running into novice gamblers who want me to explain how online slots work. Are they rigged? Do the machines really get hot and cold? Are they better than land-based games?
Since I’ve become weary of fielding these endless questions, I’ve decided to turn the information into an article and call it “Online Slots Explained.” The next time someone starts prodding me for details, I can just refer them to this URL and go get a cup of coffee instead.
How an Online Slot Works
Just like its land-based counterpart, the main component of an online slot machine is the random number generator (or “RNG”). This function starts working as soon as a virtual slot is activated , and it constantly generates random digits at the rate of several hundred per second. Since all results are random, your chances of hitting a jackpot are the same on every spin (even if the previous spin yielded a jackpot win).
When a player pushes the “spin” button, the RNG selects the most recent group of random numbers and applies them to the reels. The first number determines which symbol shows up on the first reel, the second number for the second reel, and so on. The game is over the moment the spin button is pressed, and the virtual reels are just there to show you which symbols were selected.
Most of the random numbers generated by the RNG correspond to symbols with lower payouts, which is why jackpots aren’t commonplace. This means the reels are “weighed,” or greater preference is given to some symbols over others. This can increase down the reels, which is why players often get two bonus symbols only to have the all-important third one elude them.
Par Sheets
If you want to know the probabilities for a slot, you need to get your hands on its Par sheet. This document details the specifics for a particular machine, and they’re closely guarded by designers of both land-based and virtual games. A few have made their way into circulation, but these tend to be for games found in real-life casinos.
Machine Payback Percentage
If you did manage to obtain the Par sheet for a slot, you could then figure up the payback percentage. This is the amount the customer can expect to win back if they play a machine for an infinite amount of time, and it’s calculated by multiplying the payout for a hit by its probability.
For example, let’s look at a machine with a payback percentage of 94%. That means, over an infinite number of spins, the player could expect to win back 94 cents for every dollar wagered. This percentage fluctuates over the short term, of course; otherwise, there would never be any jackpot winners.
Assuring Fairness in Internet Slots
The first step in assuring the fairness of a slot is the software company that makes the game. This is why firms such as IGT, Microgaming, and Realtime Gaming have such solid reputations within the industry.
That’s not always enough for customers or regulatory authorities, however, which is where independent testing houses such as eCOGRA and TST come into play. For a fee, they run compliance testing to make sure the slots and other casino games operate in a fair and efficient manner. Some of their testing methods include the following:
- Evaluate Random Number Generator
- Audit poker systems
- Evaluate game and mathematics
- Perform full security audit and penetration testing
- Verify and report on game payout or ongoing RNG
- Evaluate systems for pari-mutuel and lottery systems
- Evaluate betting exchanges, live dealers, and sportsbooks
- Perform quality assurance testing for technology and gaming systems
Advantages of Online Slots
Now that we’ve looked at how an online slot machine works, let’s touch upon some of the advantages they have over their land-based counterparts.
Anonymity – When you play in the privacy of your home, nobody has any idea how much you won or lost (unless you tell them).
No Extra Expenses – You don’t have to spend money to travel to a casino. Instead, the casino comes to you.
Fewer Distractions – Land-based casinos can provide lots of distractions. When you play online, it’s much easier to block out the rest of the world.
No Lines – Your favorite online slot is always available, and there’s no standing in line at the cashier.
Practice Games – There are no free practice games in Las Vegas or Macau. At online casinos, however, you can play for free and then graduate to real-money games.
No Smoking – If you’re a non-smoker, there are few things worse than going to a land-based casino and getting stuck next to a nicotine addict for hours. That’s not an issue when you play online, unless you happen to live with a smoker.
That concludes the article that we’ve dubbed “Online Slots Explained.” Now that you know how the virtual games work, you should be able to play with confidence and stop worrying about being cheated by “rigged” machines. You’ll also be able to sound like a seasoned pro, so go ahead and hit a few gambling forums and show off your knowledge.