Gen 1 Slot Machine Odds

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Slot Machine malfunctions. How and why slot machines screw up, causing players to think they've won the jackpot when they really haven't. Slot Machine Simulator. I programmed an exact replica of the Blazing 7s slot (odds-wise). Click it to play thousands of spins in one second and see how you do. This is the second part of a two-part video where Mike Shackleford, also known as the 'Wizard of Odds' gives his top 10 list of mistakes that slot machine players make.

JW17
SO i have heard, but want to know from all of you experts. When playing slot machines you should play the highest level of slot you can afford because the house take is much lower because of the higher limit. Now I have done well on the $5 slots, for instance drove to LV, walked into the high limit slots room, played $5 a spin ond on my second spin hit for $1600. I continue to play the $5 and occasionally $10 slots on my trips, a hundred or two, as I usually am just killing time and drinking. BUT I was thinking of taking a grand and trying the $100 slots. Am I crazy or is it true, there is a greater chance of hitting this than a $.01 slot?
Machine
FleaStiff
CAREFUL. The reliable information from the Gaming Authority is only available in certain denominations. The very large slot machines might indicate the identity of the licensee therefore only limited information is available and data is therefore unreliable.
P90
Available information indicates there's no or almost no gain in extreme slot denominations. I don't remember the source, but it goes like 89%, 91%, 94%, 95% for penny to dollar slots, then 96-98% for multi-dollar slots, and actually drops a little at the very top.
Also, however high the return is, it's still under 100%, so it remains a losing proposition.
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FleaStiff

Also, however high the return is, it's still under 100%, so it remains a losing proposition.

Yeah, the casino owner sort of likes it that way.
winmonkeyspit3
Also remember that $1200 on a single spin requires tax declaration, so unless you have losses to offset these you will owe money to the IRS. On a $100 machine a 12x win isn't even very big but will require a hand pay. Just keep this in mind.
pacomartin
Machine

Am I crazy or is it true, there is a greater chance of hitting this than a $.01 slot?


Of course it is true. Manufacturers always reward higher bets with better odds.
Do the math! If you improve the player advantage by a few percentage points, but you get them to bet twenty times as much, do you think that the machine makes more or less money per hour?
tsmith
Slot

Also remember that $1200 on a single spin requires tax declaration, so unless you have losses to offset these you will owe money to the IRS.


I was just wondering about this myself the other day, thinking that you'd be filling out forms every 5 minutes on the high-dollar slots, which didn't make any sense to me. So I did a little research and the way I understand it from what I've read, and I could be mistaken, the $1,200 tax thing applies only if the odds on the win were greater than 100-to-1, which would mean that on $100 slots you would have to hit a single win of $10,000 before they slapped you with a W2G.
MrV
Quote:

... the way I understand it from what I've read, and I could be mistaken, the $1,200 tax thing applies only if the odds on the win were greater than 100-to-1


You most certainly are WRONG there.
tsmith
Okay.
MrRalph
Anytime you win over $1200 on a single spin you get the W-2G. If you get really curious about higher denomination slots you could try the $1000 per spin at the Bellagio. They are 3 reel and 2 coin max I believe. A single cherry will get you the W-2G there. I have yet to see anyone playing them. I think they have two of them.

Slot machine odds used to be easy to calculate. When you’re dealing with three reels, ten symbols on each reel, and a limited pay table, then it’s just a simple math problem. But the rise of electromechanical slot machines and (later) video slots added some complexity to the situation.

How Probability Works

Probability has two meanings. One is the likelihood of whether or not something will happen. The other is the branch of mathematics that calculates that likelihood. To understand the odds as they relate to slot machines (or any other gambling game), you have to understand the basic math behind probability.

Don’t worry though. The math isn’t hard. Probability involves addition, subtraction, multiplication, and division, all of which you learned in middle school.

The first principle of probability is that every event has a probability of between 0 and 1. If something has no chance of ever happening, then its probability is 0. If something will always happen, no matter what, then its probability is 1.

Probability is, therefore, always a fraction. It can be expressed in multiple ways, as a decimal, as a fraction, as a percentage, and as odds.

A simple example is a coin flip. The probability of getting heads when you flip a coin is 50%. That’s common sense, but how is it determined mathematically?

You simply take the total number of possible outcomes, and divide the outcome you’re trying to determine the probability of it by that number. There are two possibilities when flipping a coin, heads or tails, but only one of them is heads. That’s 1 divided by 2, which can be expressed as ½, 50%, 0.5, or 1 to 1 odds.

Odds are expressed as the number of ways something won’t happen versus the number of ways that something will happen. For example, if you’re rolling a single six-sided die, and you want to know the odds of rolling a six, you’re looking at 5 to 1 odds. There are five ways to roll something other than a six, and only one way of rolling a six.

When you want to determine the probability of multiple things happening, you use addition or multiplication, depending on whether you want to determine whether one OR the other event will occur, or whether you want to determine whether one event AND the other event will occur.

The Green Machine Slot Odds

If you’re looking at an “OR” question, you add the probabilities together. If you’re looking at an “AND” question, you multiply the probabilities by each other.

So if you want to know what the probability of rolling two dice and having one or the other come up with a six, you add the probabilities together. 1/6 + 1/6 = 2/6, which is rounded down to 1/3.

If you want to know the probability of rolling two dice and having BOTH of them come up six, you multiply the probabilities. 1/6 X 1/6 = 1/36.

Slot Machine Odds Percentage

How Slot Machine Odds USED to Work

Early slot machines were mechanical devices. They had three metal reels that had ten possible stops each.

To calculate the odds of a single symbol appearing on a reel, you just divide the one symbol by the total number of potential outcomes. So if you had one cherry on a reel, your odds of hitting that cherry were 1/10, or 10%.

To calculate the odds of getting three cherries, you multiple 1/10 X 1/10 X 1/10 and get 1/1000, or 0.1%.

If the odds of hitting that symbol are the same as all the others, then you have 10 possible jackpots you can win, which means that your chances of winning SOMETHING are 10/1000, which is 1%.

Most people wouldn’t play a slot machine that lost 99 times out of 100, though, so slot machine designers added additional, smaller prizes for getting two symbols out of three for certain symbols. And as long as they paid out less in prizes than the odds of hitting those jackpots, then those slots are guaranteed to make a profit in the long run.

For example, if a prize for hitting three cherries was $1000, you’d be playing a break-even game, but if the prize were $750, it’s easy to see how the casino would be guaranteed a profit. The difference between the odds of winning and the payout odds is where the casino makes its money.

How Slot Machines Work Now

Modern slot machines use a computer program called a random number generator to determine the outcomes of the various spins of the reels. This creates an imaginary reel with a number of symbols limited only by the program in question.

A mechanical slot machine with 256 symbols per reel would be huge, too large to play, much less to build. But a computer can create an imaginary reel with 256 symbols per reel and take up no more space than an iPod Shuffle.

To make things even more interesting and entertaining, slot machine designers can program different probabilities for each symbol to come up. Most symbols might come up once every 256 spins, but others might come up twice as often, while still others might only come up half as often.

Casino Odds Slot Machines

This enables slot machine designers and casinos to offer slot machine games with far larger jackpots than they were able to when they were limited by mechanical reels. And they’re able to offer these large jackpots and still generate a healthy profit.

How Does This Relate to Payback Percentages?

The payback percentage is the amount of money that the slot machine is designed to pay out over an enormous number of spins. This number is almost always less than 100%. The difference between 100% and the payback percentage is the house edge, and that’s where the casino makes its profits.

Slot Machines Odds Of Winning

A simple example can help illustrate how this works. Suppose you have a slot machine with three reels with ten symbols on each, and it only pays out when three cherries hit. The odds of winning that jackpot, as we determined earlier, is 1/1000.

If we set the jackpot as $900, and charge $1 per bet, the payout percentage for that game will be 90%, or $900/$1000. Of course, no one would play a slots game which only paid out once in every 1000 spins, which is why there are various smaller payouts programmed in.

There’s no way to tell what the payback percentage on a particular game is unless you have access to the par sheet for that machine. Casino management has that information, but players never have access to that info.

The best slot machine odds are almost always found in real casinos. If you see slot machines in an airport or a bar, be aware that the payback percentages on those games is much lower than you’ll see in a real casino.

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