this post was submitted on 24 Jun 2024
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In the UK, slot machines fall into 4 main categories. Of particular interest are category C machines, as these can remember a fixed number of previous games. I.e. the "myth" that a machine is "about to pay out" because "someone lost a lot to it" can hold for these games.
Cat A and B machines are completely random, previous games can have no impact on probabilities of winning (though pots can climb).
Online games have different rules, not always fair ones!
Oh, and ALL games (in a physical location) must (by law) show "RTP" (return to player) somewhere. It usually gets stuck it in a block of text in the manual since no-one reads them. (If it's below 97.3% just go play roulette as it offers better returns).
walks into a casino Alright man, gimme the manuals to these bad boys right now, money ain't gonna win itself.
Speaking of slot machines, every slot machine, electronic poker machine, etc. are just state machines that operate based on a stream of random numbers fed into them by another device.
The random number generators (RNGโs) used for gaming are highly regulated (at least here in the US) and only a small handful of companies make them. They have to be certified for use by organizations like The Nevada Gaming Control Board. RNGs have to be secured so only NGC officials and other key people can access them. If they are opened unexpectedly or otherwise tampered with then they need to go into lockdown and stop generating numbers until an official resets it.
The RNGs also need to be able to replay sequences of numbers on demand. If the same sequence of numbers are fed into a game and the user plays the same way then the result of the game should be 100% identical each time.
Extra fact - in the USA almost all games use long weighted reels.
I believe this is by law, but may be misinformed.
Also, if you know the rng gen you can game machines: a very very clever group in Russia bought up old machines from defunct casinos, reverse engineered the games, and then developed an app that let a user photograph x number of spins to find out what the seed was for the next spin, and from there told them to bet high or low based on the upcoming game. They made millions, and farmed it out to make more. (https://www.wired.com/2017/02/russians-engineer-brilliant-slot-machine-cheat-casinos-no-fix/)
What about category D?
Never really worked with them (we never made them).
I think they're lower prize threshold cat Bs.