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Ask the Slot Expert: Calculating the long-term payback of an online slot8 May 2013
The animation you see on a video slot is not the actual spinning of the reels. Most video slots have a sequence of animations they go through to display the reels starting to spin, spinning and then slowing down. It's only when the reels stop that what you see really exists in the programming of the machine. What you see is like a cheap cartoon that reuses footage over and over. I assume that online slots work the same way. So, you can't try to reconstruct the video reels by slowing down the spinning animations. You should be able to reconstruct the reels by noting the symbols you can see after the reels have stopped and piecing those snippets together. To calculate a machine's long-term payback, though, you don't really need to know the layout of the virtual reels. All you need to know is each symbol's probability of landing on the payline on each reel. If you keep track of how many times each symbol lands on the payline on each reel, you can calculate estimates of the probabilities -- and your estimates get better with each play. I think you'll find estimating probabilities to be the easiest way to calculate a machine's long-term payback. Jackpots for all,
Dear Dennis, The machine might use the same reels for the free spins or it might use different reels. Machines frequently say that special bonus reels are used when the reels are not the same. In your case, it doesn't sound like you went into a "free spin bonus round." It sounds like you just won some free spins. In this case, the reels are usually the same as those used for a paid spin. Cold streaks can happen during free spins, in addition to during paid spins. I think that's what happened to you. I recently won some free spins (not 50, about 10) on a slot and didn't win a single thing on them. At least you won toll money on yours. Jackpots for all,
Dear Harry, Thanks for the kind words about my columns. I'm pretty sure that the music on those machines was commissioned for use on them. Licensing existing music is usually very expensive. Manufacturers usually promote the fact that a machine features music that people have heard and I couldn't find any mentions that these machines feature songs from the past. If anyone knows that these machines are using existing music, please let me know. Jackpots for all, Send your slot and video poker questions to John Robison, Slot Expert™, at slotexpert@slotexpert.com. Because of the volume of mail I receive, I regret that I can't reply to every question.
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