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pizzatron
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11-12-2005, 08:36 PM
Post subject: How'd you catch me if I rigged my RNG like this...
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#1 (permalink)
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Join Date: Aug 2005
Posts: 40
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I was reading on google groups about how sites could potentially rig their RNG and NOT get caught. This thread is not about whether WHY they would want to rig it, or IF they do. It's purely hypothetical and I wanted to know if you guys think that a site can be caught if they're indeed doing so. One of the posters on a thread I read suggested the following ways that a RNG can be rigged without being detected very easily. I'm sure other methods can be employed, but this only serves as an example.
1st possible method:
One hand in every seven, two suits are chosen at random, and all cards below the 10 in those suits are taken out of the deck, so a 36-card deck is used to deal this hand, which will be more likely to generate action because of increased high-card and flush possibilities.
Over the other six hands, a 46-card deck is used, with six of the 36 cards
from the 'Action Deck' mentioned above, taken out of play at random, until they've all skipped their turn.
This ensures that every card will show up an equal number of times overall, and they can 'prove' the non-riggedness, while still rigging the game.
2nd possible method:
Use a 'sticky cards' logorithm when performing random shuffles. Every
Ace-thru-Jack (16 cards total) is allocated eight cards that work well with it (same value, same suit, or connector). One of these court cards is chosen at random, and three of the eight 'sticky cards' are stuck either side of the card in the deal, so if the Qc was the randomly designated card, there could be a sequence of QhKcKdQcAcJsJd in the deal, for example.
The juicy sequence might come up when dealing hole cards, it might be the last flop card, and the turn and river, or the deck might not get to it all (which proportionately increases the likelihood of a concentration of low connected cards). Again, it's not really detectable.
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The reason I looked this up is because I find that some people argue that online sites (especially well-known ones) could not possbily be rigged because it'd easily show up on poker tracker and the thousands of players who keep track of their hands.
Again, I'm not suggesting that poker sites are rigged. I'm only suggesting that IF they do, would anyone be able to catch them given that not all hole cards can be seen through recorded hand histories?
Pizzatron
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pizzatron
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Join Date: Aug 2005
Posts: 40
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If anyone is interested, the post that i found is from here:
http://groups.google.com/group/rec.g...dc4d772efa42a1
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UG
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Moderator
Join Date: Jan 2005
Posts: 1,855
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If a tree falls in a forrest, and no one is there to hear it fall, does it make a sound?
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pizzatron
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Join Date: Aug 2005
Posts: 40
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please clarify what you mean by "sound".
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EasyT
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Full House
Join Date: Jan 2005
Location: Yo Mamma
Posts: 834
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I know this is not an answer, Pizzatron.
But I make money playing online poker. I've agreed to accept that the game is not in any way fixed. I don't care if it IS fixed. I'm making money.
EasyT
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LeFou
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4-of-a-Kind
Join Date: Jul 2004
Location: Dallas, TX
Posts: 2,361
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another way to rig it would be to hire people to point guns at all our heads and tell us whether to fold, call, or raise. The question is: has it happened?
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a500lbgorilla
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JESUS TAKE THE KEYBOARD
Join Date: Sep 2004
Location: This room is a good place to be
Posts: 8,379
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Alright, we don't have to immediatly pile on this guy becuase he's got another "internet poker is rigged" thread. This one sounds like it has potential to be different.
That being said, if they are rigging their cards in a manner as described, I have no idea how they would be caught. All I know is that if you believe there is a good chance the game is not on the level then you shouldn't play. It seems to me that since no one at the table is aware of how the RNGs would be rigged, it would give no advantage to anyone and it's still a "fair game" from the prespecitive that the best player should still win the most money. And if that is the case, then I don't really care if they are subtly rigging the decks to slightly increase rake becuase I'm still profiting.
I also wonder, wouldn't a sign that one site is rigged be the fact that you pay more in rake at that site? It seems like an easy way to detect, just have one person play simultaneously at 2 different sites for a few months and see who pays more. Though, sites rake differently so that may be off.
-'rilla
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Smithers, use the amnesia ray.
You mean the revolver, sir?
Precisely.
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pizzatron
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Join Date: Aug 2005
Posts: 40
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Quote:
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Originally Posted by a500lbgorilla
Alright, we don't have to immediatly pile on this guy becuase he's got another "internet poker is rigged" thread. This one sounds like it has potential to be different.
That being said, if they are rigging their cards in a manner as described, I have no idea how they would be caught. All I know is that if you believe there is a good chance the game is not on the level then you shouldn't play. It seems to me that since no one at the table is aware of how the RNGs would be rigged, it would give no advantage to anyone and it's still a "fair game" from the prespecitive that the best player should still win the most money. And if that is the case, then I don't really care if they are subtly rigging the decks to slightly increase rake becuase I'm still profiting.
I also wonder, wouldn't a sign that one site is rigged be the fact that you pay more in rake at that site? It seems like an easy way to detect, just have one person play simultaneously at 2 different sites for a few months and see who pays more. Though, sites rake differently so that may be off.
-'rilla
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Rilla,
Thanks for the constructive reply.
I'd like to address a few points according to what you have said:
1.) If a site is indeed rigged, then the winning players cannot optimize their strategy. You're right that no one on the table knows "how" it is rigged. But it is still possible that you could be winning less $ per hand because of the riggy RNG. Are we going to stop playing or Is there anything we can do about it? Probably not.
2.) Is there a way that we can proof it's rigged?
If some sites do use a variation of the RNG design in my first post, how can anyone say with confidence that all online sites are not biased against "perfect" poker play?
3.) "Why would sites want to rig their RNG? They're risking millions!"
I'd like everyone to think about this particular hypothetical scenario in context of our world's business envrionment and the type of people who run poker rooms (hint: think enron and mobs). If your super duper smart MIT-grad RNG designer says that there is a way to increase rake or help out the fish with 0% chance of getting caught, how likely would the bosses want this done?
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FInally, it'd be nice if I'd stop getting belittled for thinking that a site could be rigged. I don't consider myself a weak player, nor do I think the idea that rigged poker sites are overly naive.
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LeFou
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4-of-a-Kind
Join Date: Jul 2004
Location: Dallas, TX
Posts: 2,361
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Well, I don't know what they use to audit hand histories but it's probably pretty sophisticated.
To detect the first method: you just need an auditor that looks at *more than just how often each card appears. You could look, e.g. at
-how often there are 2 suited, 3 suited on the flop, turn, and river
-how often the board contains 2+ big cards
Presumably the auditors (and general public keeping track of their stats) know that boards with lots of suited cards, pairs, and big cards generate more rake. I imagine they'd figure out a way to watch for that.
I suspect that similar auditing would reveal rigging done by method 2.
Now, although we cannot say for damn certain that there isn't and won't be any rigging, there's a good theoretical reason why there wouldn't be:
Any deviation from true randomness that created a worthwhile amount of excess rake would be statistically significant and therefore detectable. By definition, as soon as the "fix" starts getting to be worth the risk, the risk becomes much greater.
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pizzatron
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Join Date: Aug 2005
Posts: 40
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Quote:
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Originally Posted by LeFou
Well, I don't know what they use to audit hand histories but it's probably pretty sophisticated.
To detect the first method: you just need an auditor that looks at *more than just how often each card appears. You could look, e.g. at
-how often there are 2 suited, 3 suited on the flop, turn, and river
-how often the board contains 2+ big cards
Presumably the auditors (and general public keeping track of their stats) know that boards with lots of suited cards, pairs, and big cards generate more rake. I imagine they'd figure out a way to watch for that.
I suspect that similar auditing would reveal rigging done by method 2.
Now, although we cannot say for damn certain that there isn't and won't be any rigging, there's a good theoretical reason why there wouldn't be:
Any deviation from true randomness that created a worthwhile amount of excess rake would be statistically significant and therefore detectable. By definition, as soon as the "fix" starts getting to be worth the risk, the risk becomes much greater.
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Thanks for the reply, LeFou.
My initial post was simply an attempt to show that there are probably many ways to rig a deal beyond a simple "tweak the percentages" or "give people more face cards" methodology that can be difficult if not impossible to detect. You mentioned some ways that those 2 methods can be detected, but I think that they are not necessarily enough for anyone to be certain for the following reasons:
1.) For the general public to prove that it is truely ramdom, a VERY large sample is needed to determine statistical significance, especially since they don't have access to all hole cards and not all hands go to the river.
2.) One would need undeniable proof that the site is rigged. Otherwise it's just another consipiracy theory and your word against theirs. I cannot be certain whether this kind of information can be obtained by the general public through their own hand histories (e.g without information such as everyone's hole cards.)
2.) We must put faith in the auditors who have access to all the information and are able to check for randomness. Do we have good reason to believe (esp. the smaller sites) who claim they're audited by company x and their business is run out of a certain country overseas?
Finally, I tend to agree that it is probably not worth it for them to rig. But a few percent of billions is still millions, and i'm sure that many companies have performed more shady business practices for less. If it's very very unlikely for them to get caught, why not do it? I hate to bring up the enron example again, but I think corruption can and do occur at many levels.
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CrunchyNuts
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Flush
Join Date: May 2005
Posts: 436
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There are very clear and rigid probabilities for every occurance in poker. Any deck rigging will mess with at least one of those occurances. There exist extremely large hand databases out there that would certainly qualify as solid evidence.
And if you doubt a site's auditing claim, you should contact the auditor to verify the claim.
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krimson
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11-14-2005, 02:51 PM
Post subject: Re: How'd you catch me if I rigged my RNG like this...
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#12 (permalink)
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3-of-a-Kind
Join Date: Jul 2005
Posts: 108
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Question: How'd you catch me if I rigged my RNG like this...?
Quote:
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Originally Posted by pizzatron
One hand in every seven, two suits are chosen at random, and all cards below the 10 in those suits are taken out of the deck, so a 36-card deck is used to deal this hand, which will be more likely to generate action because of increased high-card and flush possibilities.
Over the other six hands, a 46-card deck is used, with six of the 36 cards from the 'Action Deck' mentioned above, taken out of play at random, until they've all skipped their turn.
This ensures that every card will show up an equal number of times overall, and they can 'prove' the non-riggedness, while still rigging the game.
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Answer: E.g. by counting the occurances of suited hole cards. This method of rigging will cause more suited hole cards to be dealt, and the increase is large enough that the difference will be significant even for moderate sample sizes. (You could equally well count occurances of high pocket pairs, suited flops or whatever. The principle is the same as I explain below. Suited hole cards was just the first that came to mind for me.)
The probability of being dealt suited hole cards if there is no rigging is P = 12/51 = 0.235294. With a little bit more work we find that the probability of being dealt suited hole cards is about 0.279365 in the 36-card 'action' deck and 0.235933 in the 46-card decks. So the average probaility (weighted for the fact that we have 6 times more 46-card decks than 36-card decks) is P' = 0.242137. The difference D = P' - P = 0.00684332.
If you count the average number of suited hole cards that you were dealt in N hands the result is (assuming the RNG is not rigged) an approximately normally distributed random variable with mean P and standard deviation sqrt(P(1-P)/N) = 0.424182/sqrt(N). The probability that a normal random variable takes a value that is more than 3 standard deviations away from its mean is about 0.2%. Therefore we can design the following test:
Take N so that 3*0.424182/sqrt(N) < D. N = 40000 is large enough. Compute the average of the number of suited hole cards from N hands. If the game is unrigged there is only a 0.2% chance that the result will differ by more than D from P, so if it does we have good reason to suspect that something is iffy. But if the game has been rigged in the way suggested then the difference is quite likely to exceed D (since then the expected value for the average is P').
The conclusion is that this method of rigging could be detected with a high degree of certainty by anyone who has at least 40000 hand histories.
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koolmoe
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Full House
Join Date: Jun 2004
Location: Drowning in prosperity
Posts: 1,279
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One strong argument against any rigging is that there are far easier ways to generate increased rake that don't require rigging the deal.
When you couple that with the fact that the majority of poker sites value fairness (or at least the appearance of fairness), I think that it is easy to operate in good faith that the deal is a fair one.
None of this means that the deal is not rigged, but it is disincentive to spend a lot of time trying to figure out if it is.
Finally, as a winning player, I strongly hope that no smoking gun is ever found, as it is likely to cripple the online poker industry. If there's evidence at the bottom of the proverbial poker lake, I don't want to drain it to find out and risk killing the fish in the process.
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Poker is freedom
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lamaros
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Flush
Join Date: Jul 2005
Posts: 346
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Quote:
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Originally Posted by CrunchyNuts
There are very clear and rigid probabilities for every occurance in poker. Any deck rigging will mess with at least one of those occurances. There exist extremely large hand databases out there that would certainly qualify as solid evidence.
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Next!
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LeFou
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4-of-a-Kind
Join Date: Jul 2004
Location: Dallas, TX
Posts: 2,361
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Quote:
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Originally Posted by koolmoe
One strong argument against any rigging is that there are far easier ways to generate increased rake that don't require rigging the deal.
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Bingo. Every played those sites with delicious bonuses that are based on how much you personally contribute to the pot? I have, and I'm constantly tempted to call something I shouldn't etc.
yes, a "few percent" of billions is millions, but
-you're currently making billions with 0 chance of being caught 'cause you're not rigging anything
-you could add a few percent to this by rigging the deal and constantly skirting financial ($) and personal (jail) disaster.
or
-you could add a few percent through a completely aboveboard means such as I described.
Three roads diverge...
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salsa4ever
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Full House
Join Date: Jun 2005
Location: Melbourne
Posts: 1,073
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Quote:
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Originally Posted by koolmoe
Finally, as a winning player, I strongly hope that no smoking gun is ever found, as it is likely to cripple the online poker industry. If there's evidence at the bottom of the proverbial poker lake, I don't want to drain it to find out and risk killing the fish in the process.
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Amen
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Originally Posted by bigred
Would you bone your cousins? Salsa would.
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Originally Posted by salsa4ever
well courtie, since we're both clear, would you accept an invitation for some unprotected sex?
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pizzatron
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Join Date: Aug 2005
Posts: 40
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Hey everyone.
I agree with all of you that I don't think any of the major sites are rigged. I was merely interested in whether it is possible to rig without being detected through only statistical analysis.s
But motives, moralities, or practicalities aside, do you think we can conclude that it is impossible, in the very literal sense of the word, to create a non-random RNG that:
1. favors the house, whether by increasing rake, maintaining customers, or other benefits
AND
2. avoid detection through statistical analysis, assuming that the "detector" has no insider information on all of the hole cards nor the final outcome of hand due to lack of showdowns. (i'm not a stats expert, so I don't know if this can be exploited one way or another when desinging a non-random rng.)
?
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