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The RNG
There are many modern computerized slot machines. The odds are programmed. In modern slot machines, the reels and lever exist only for historical and entertainment reasons. The positions of the reels are chosen by a Random Number Generator. It is included into the machine's software.
The rate of generating random numbers by the RNG is extremely high. The most recent random number is used to determine the result when the Play button is pressed. That means that the result depends on exactly when the game is played. The result changes every fraction of a second.
It was noticed that the RNG does not actually generate random numbers. It turned out that The number sequence is repeated time after time. Poor programming is its reason. Pseudo RNGs with very long periods canbe built relatively easily. No computer can complete a single period in the expected lifetime of the universe. Ronald Dale Harris, a former slot machine programmer, had access to the pseudo RNG code and seed values. He discovered equations for specific gambling games like Keno. Thanks to them the fact that the next set of selected numbers would be based on the previous games became known. But it is impossible for most machines, because numbers are picked by the RNG even when no one plays. So the player cannot see the secquence.
Payout Percentage
Slot machines are typically programmed to pay out as winnings 82–98 per cent of the money that is wagered by players. The term theoretical payout percentage is used to denote it. Jurisdictions influence the minimum theoretical payout percentage. Law or regulation typically establish it. Nearly each casino has its own winning pattern. It contains the information about the amounts they pay and the frequencies of these pay-outs. The main criterion for selecting the winning patterns on slot machines is that they should yield a certain fraction of the money played to the house. The players get the rest of the money.
A slot machine's software is written and the theoretical payout percentage is set simultaneously. Physical swap of the software is needed for changing the payout percentage after a slot machine has been placed on the gaming floor. Based on current technology, this is a time-consuming process and as such is done infrequently. In certain jurisdictions the EPROM has a tamper-evident seal. Only Gaming Control Board officials can change it. Other jurisdictions constantly ensure that slot machines contain only approved software.
The Nevada Gaming Commission is working now with Las Vegas casinos on technology that would allow the casino's slot manager to change the game, the odds, and the payouts remotely. The change can be done only after the selected machine has been idle for at least four minutes. After the change is made, the machine must be locked to new players for four minutes and display an on-screen message informing potential players that a change is being made.
Machines Linking
Often machines are linked together in a way that allows a group of machines to offer a particularly large prize, or jackpot. A small amount is contributed by each machine in the group to this progressive jackpot which is given to a player who gets a specific combination of symbols. The amount paid for the progressive jackpot is usually far higher than any single slot machine could pay on its own.
Sometimes multiple machines form multiple casinos. In these cases the manufacturer owning these machines is responsible for paying the jackpot.
Near-miss Programming
Computer software controls the reel display of modern slot machines. It is possible to make the slot machine frequently display combinations that are close to winning combinations.
The term near-miss programming is used to denote this practice.
A related phenomenon is sometimes called near-miss. It is winning percentages that control the chance of a winning combination appearing on a pay line. The combinations above and below the payline are all roughly equally randomly distributed. This means it is much more likely that a winning combination will appear above or below a pay line than on the pay line. The occurance of this phenomenon is possible when abbreviated physical reels are used to display a win pattern based upon the RNG. In video slot machines, virtual reels are used and the symbols that appear around the winning line are usually an accurate depiction of how the reels were mathematically modeled.
There was an investigation held by the Nevada Gaming Commission concerning the issue of a near-miss above or below the pay line. If the near-miss above or below the pay line was not specially programmed it was stated to be legal. The near-miss and any other combination should have the same possibility of occurrence. The machine cannot be specially programmed to show winning combinations more frequently than other combinations above or below the pay line.
In Australia near-miss programming, where a near miss is inaccurately displayed is not allowed either. To audit manufacturer's practices regulators use stop motion cameras.
Slot Machines Fraud
Mechanical slot machines and their coin acceptors were sometimes susceptible to cheating devices and other scams.
Modern slot machines are controlled by EPROM computer chips and coin acceptors were changed for bill acceptors. Different advanced anti-cheating and anti-counterfeiting measures have been taken to make it difficult to defraud these machines. An example of modern ways of slot machine defrauding is directing microwaves toward it to disrupt its proper functioning.
It doesn’t require much skill to play slots. Slots give you an opportunity to win a lot of money. The main element of all slots is RNG, which determines the outcome. RNG is a Random Number Generator. RNG is a microchip, which is constantly churning out thousands of numbers a second. RNG churns the numbers even if nobody plays. When you hit a spin the machine takes the next number out which it then translates into the position which the reels should stop at, and whether you have won or not! Before playing you have to decide how many coins for each go you want to play. If you have enough money or credits you’d better make maximum bets. If you make maximum bets you have an opportunity to get the maximum win, which for some slots is the Progressive Jackpot. The type of the slot machine determines the payout.
The first gambling machine, on which all modern slots are based, was invented by Charles Fey in 1887. Then not symbols, but cards were used. There were three mechanical reels and the lever, which had to be pulled to make the reels move. It was Charles Fey who offered the first slot machine to the public. The first slot consisted of three mechanically spinning reels. Every reel had ten sections with different pictures on them. If three equal pictures came out at the same time it was a win. In 1889 there appeared slots, which gave an opportunity to win the jackpot. Fey’s first slot machine was called the Liberty Bell. Then slots were played mostly by women. Women played slots while their men gambled. There was a period of time when any kind of gambling was forbidden. The reaction was the appearance of “Liberty Bell Gum Fruit” slots. With “Liberty Bell Gum Fruit” people could buy a chewing gum and as a bonus they got an opportunity to have a spin. Pictures of different fruits were used as the symbols. At the end of the 20th century computerized slots and video poker machines appeared. Modern slots are much easier to use. Gamblers push the button and the game starts. Now playing slots through Internet is available for players from all over the world.
All slots work according to one and the same rule. You put coins or money in the slot machine and then pull the handle. The main classification of slots distinguishes two types of slots: straight and progressive slots. The main feature, which distinguishes straight slots from other types is that you get paid according to the payout table, which is shown on the slot machine. Straight slots in their turn can be divided into multiplier, bonus multiplier, multiple payline and buy-a-pay slots. When playing multiplier slots you should always bare in mind that the payoff is dependent on the number of coins being bet. The main principle of bonus multiplier slots is a bonus round, which becomes active if you play with maximum bets. The feature of multiple payline slots is that the number of active payline is dependent on the number of coins being bet. The Buy-a-Pay slots are profitable only if you place maximum bets. Progressive slots are characterized by the big jackpot, which progressively gets larger and larger, as every coin is put in. The amount of the Progressive jackpot is always shown on the slot.
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