This question applies to both free to play or paid servers. It is very much possible that the online poker host can cheat by playing intelligent bots.

I suspect Zynga Poker is all time big cheater. Though its virtual money many people spend real money and some, like me, spend good amount of money (avg. of $5-$20 a week) buying the virtual money. I never seen anyone actually increase their bankroll but they lose all their chips within 10-15 days.

Is it possible to detect? Do you every suspect any site like this? Can we take any legal action apart from quitting from the site?

  • This was reported a few years ago where on a for money site one of the players either had access to the admin mode which allowed the player to see the hole cards of all the players or was being fed information from an insider. Though I never did hear of the actual outcome I believe there was a warrant for arrest issued for an employee.
    – Chad
    Feb 7, 2012 at 17:49
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    you probably talk about the case in absolutepoker.com (if I am not mistake): Few years ago, one of the employees configure his friend to be in debug mode' means he can see the hole cards of all the players in the table. He earned a lot of money and than he loses the many to other players deliberately and they withdraw the money. The interesting thing is that he was caught after professional poker players who play against him reported to the site that there is something strange in the way he plays..
    – amigal
    Feb 7, 2012 at 19:42
  • i would question why you'd play Zynga by paying for virtual money, you'd be better paying $20 a week on a real site imo.
    – user424
    May 10, 2012 at 15:08
  • @4t4 not every where is poker is legal (not even online). In my country there is only 2 places and its 2 hour flight journey :( I am going tomorrow anyway :) )
    – Poker Face
    May 10, 2012 at 17:38
  • Oh ok, fair enough. seems an odd concept to pay for virtual money though, but if thats the only option. :-)
    – user424
    May 10, 2012 at 22:36

10 Answers 10


First let me point out I believe this is exceptional: it is definitely not the rule. Most importantly, I believe the big online sites are fair (and I won lots of money there ; )

I point this out because I won't fall and I'm not going to spread the paranoia: "zomg, all poker sites are rigged". Because they're not. Most of them are fair: they're winning enough millions with the rake and buy-ins fees so that they don't need to jeopardize their businesses by being shaddy.

Is it possible to detect?

Yes. Definitely. Such behavior (rogue sites) has been detected in the past and players did force shaddy sites to admit they had: superuser accounts, rigged random number generators, etc.

It's however very hard to detect and you need very, very, smart people to be able to analyze gigantic amount of hands and prove the wrongdoing.

Do you every suspect any site like this?

Yes. I won't give more info. That particular site is down now.

Can we take any legal action apart from quitting from the site?

Yes, but you'd probably need to team up with other players who've been deceived. There's one underway now: several players are claiming, under the RICO act (where you can claim up to 'x' times your losses), several millions of dollars to the company who operated Absolute Poker / Ultimate Bet (these online sites are down now).

Here's one link to that "recent" (as I type this) lawsuit:


That said, if you could prove something like this and if the site were to operate under a licence, you probably could also contact the organization in charge of issuing the licence and complain there. For example if you were to detect that one french site is blatantly cheating and if you can back up your claim, then you could contact the "ARJEL" and they'd probably take your research very seriously.

  • random unsubstantiated "fact": online poker sites rake $300 million every month. Feb 8, 2012 at 2:12

I am not a lawyer, but I suspect you don't have any recourse against a free-to-play site like Zynga. They would need to be licensed by a third party, and you would then seek redress with that third party.

Most real money sites are licensed by some sort of third party, generally a government office such as a gaming commission. If you suspect a real money site of cheating, you would need to work with the licensing party for that site. For instance, if RealMoneyPokerSite was based in Nevada, you'd need to work with the Nevada gaming commission for any recourse you would seek. If you don't feel that the Nevada gaming commission will do a proper job protecting players, then you need to take that into account when depositing money with RealMoneyPokerSite.

Lastly, I don't think Zynga has bots playing the games. They deliberately steer players towards tables that will put most of their chips on the table at once, and play on Zynga is very loose. It is a very high variance environment, and if you play with most of your virtual bankroll on the table at any one time, you will go bust a lot. Don't put more than 5% of your bankroll on the table at any one time, favor strong starting hands, and you will come out on top. Don't play speculative hands (suited connectors, lower pocket pairs) for any decent raise preflop. Don't go all in preflop with lower pairs - TT isn't that strong when you've got 4 other people calling with any broadway + rag.

  • I am not sure about bots but, try playing with your friends from same LAN, more than 35% of time you and your friends pocket will be connecting holes, which means, JK, Q10 or A3, K2 or 86, 45 and so on. 45% times you and your friend will have a common high card like A2, AJ or J5, 5A.
    – Poker Face
    Feb 8, 2012 at 6:22
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    And you should be folding nearly all of those hands. A2s or A3s can be played if there isn't a big raise pre, AJ, KJ can be played. Toss the rest. This is probably a case of confirmation bias - you notice these hands when they happen, but you don't notice all of the hands where it doesn't. Try actually writing down every hand you get for 3 hours. Feb 8, 2012 at 14:06
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    I should try that writing down. Yes, its doable. I will be on that mission to prove Zynga a fraud.
    – Poker Face
    Feb 8, 2012 at 17:30

Bots, if they are run by the host, still have to perform effectively. Lots of research into this via University of Alberta poker AI group describes just how difficult this is. I'm sure it's against almost all sites T&C's to allow bots on their networks so I'd say it's very unlikely, if not too difficult to be wothwhile.

As for the cheating aspect, it seems that whatever the quality of evidence that is released the debate never stops. It's like a zombie that keeps coming back, no matter how many times it's killed!

As I mentioned in a comment for another answer on this thread, Stars published the results of it's RNG audit here by a company called Cigital who specialize in software security. Also...

...provides more independent analysis on hand distribution data. Both analyses show that online poker is fair. At least in that instance ;)


You alone cannot determine if a poker server is cheating. Making that determination for all but the most ridiculously obvious biases requires statistical analysis of a sample size of millions, perhaps even billions of hands of poker.

So in the case of the Absolute Poker scandal, where a player could see his opponent's hole cards and was making no attempt to disguise this fact, the analysis used to prove he was cheating used a database of ~30,000 hands to statistically prove that the player was winning at an impossible rate, and that this was because he was playing perfectly against his opponent's specific hands.

If you wanted to prove that there was some bias in the random number generator of a poker site you would need to play multiple tables for many hours a day for many months in order to have any accuracy in your analysis.

So here's the best thing to do when you think an online poker server is cheating:

  1. Recognise your own confirmation bias.
  2. Understand the true nature of probability, statistics and randomness.
  3. Recognise that significant variance can occur in small sample sizes.
  4. Acknowledge the impossibility of proving your hypotheses.
  5. Accept you are in the lap of the random number generator and must deal with the results.

I would like to strengthen the other answers here. Yes, its possible to detect such sites but its very difficult.

Its most likely that you face two (or more) players in the table that share their cards and cooperate (using Skype or any other SW). To reduce the chance of being cheated like that, play multi-table tournaments.

Regarding BOTS - don't forget that someone inside the company should write and manage those BOTS programs. People will know about and its too much of a risk for the site.



It is a little bit of a side topic.

I'm not justifyin it, all the contrary, but I guess that sites like Zynga may not be subjected to any license/regulation. From some point of view they can be considered more like Farmville and the sarm of idle games. You pay some money to play with them, like you pay some money to enter a cinema.


what do you mean by "cheats"? If you are good at Googling, you will easily find relations between zbot from annual computer poker championship and zynga poker on facebook. Using bots in learning poker game is a good type of practice. Since zynga is about organizing games using "play money", it is up to you whether make real money deposits or not.

Also, beating poker AI like zbot is not an issue for advanced players. It calculates GTO strategy so according to Nash Equilibrium, you should use GTO as well to win. But a human will never calculate something like GTO so a human will never win against GTO. But NLHE can not be calculated with existing computational power, so you can play against "not complete GTO" using an Exploitational Strategy.

All the academic poker AIs compete in calculating GTO. But REAL poker AIs that earn money on rooms use Exploitational Strategies against each opponent. There is weak information in Google about such strategies because it really makes money for the users.


There is little you can do without proof, you need a large glut of data and the statistics to back it up - or insider access.

On a sidenote those proclaiming RNG (random number generators) to be regulated/unregulated seem to of missed the point - you cannot program randomness, there is a set pattern and an unnatural deal occuring with any poker played online - the scope for companies to alter code to their benefit (either through more rake, players losing and pumping more money onto a site, etc) is huge.

Anyone who argues they don't need to, they make enough money needs to remove their head from the clouds - greed, wealth and power do not care, the more they can make, the more they will make. Action flops are so common with online poker it is untrue and the amount of hands that encourage 2/3/4 players to throw in chips is seriously slanted. It is difficult to prove and, more importantly, there doesn't seem to be an impetus to actually investigate the companies more fully. If you read the small print in the terms and conditions for any online poker site then it might make you think twice before using it again.

As for Zynga lol! Rigged hands, rigged tables, set-up hands for 'action' purposes, possible bots, large amount of people cheating either being able to see others cards, giving themselves tons of free chips, having multiple accounts playing one table or being able to actually manipulate play (those who have experienced a freezed game followed by a ridiculous turn & river giving an opponent a win will know what I mean). Bottom line: give Zynga none of your money, ever!

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    It's a shame you feel this way. "There is little you can do without proof" - I agree, yet you offer lots of examples with no proof of your assertions. "Action flops are so common..." - You have proof?. Also, you can program randomness. Stars published the results of it's RNG audit here by a company called Cigital who specialize in software security. They offer lots of white papers and publications on this subject.
    – Toby Booth
    Dec 6, 2012 at 16:09

Zynga Poker is a free-to-play game where you get given a certain amount of virtal chips when you create your account.

Since starting I haven't spent a single dollar of real money and I have managed to accumulate over $2million in chips, then lost nearly all of it and then get it back again. After a long string of bad luck I am now sitting on around 300,000.

So maybe I'm very lucky? I don't know. I don't consider myself a very good poker player in general as I often lose all my chips and lesve the table when playing with real cards and chips in real life.

It does not appear that the Zynga server cheats. However I often suspect that man of the users/players cheat. As many times I have seen people go "all in" before the flop and get a flush or straight etc.; and it's not pure luck, because they're doing it multiple times in one sitting. This prompted me to do a little bit of investigation - I googled "Zynga Poker cheats" and saw that there were quite a few around.

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    Commenting that you saw a few suspicious things & having no data or references to back up your accusations makes for a very weak argument. Also, it seems you neglected to answer the question. Perhaps, can you suggest a course of action to take to verify your claims?
    – Toby Booth
    Dec 25, 2013 at 1:26

zynga poker is full of cheats and bots, all you have to do is look at players profiles, they will tell all. It is to the point where I cant go to a table that doesnt have 40 percent of cheaters sitting there, look at their hands played versus hands won, how long they have been playing, and the level that is shown for the amount of hands played and won, it is almost impossible to find a table with just normal players, and zynga knows this, I report probably 20 to 30 cheats a day, and yet will still see them again the very next day.

  • 1
    So your actual answer is to to report those players who you think are cheating.
    – Toby Booth
    Dec 30, 2013 at 0:10

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