home | about us | contact | site map | credits | disclaimer | bookmark

English Harbour casino cheating at video poker

Thursday, May 04, 2006

English Harbour casino cheating at video poker

English Harbour casino has been caught dealing non-random video poker.

A player had his suspicions that something was amiss with the double-up feature of the Tens Or Better video poker game, and so conducted a test, reporting his findings in the "mathematical proof that English Harbour is cheating" thread at Casinomeister:

I deposited and carefully recorded data for over an hour, doubling after every win, except I collected any large wins, and recording for each double the result, win, lose or push.

I played until I lost all my money (playing 4 line, single coin, recording wins, losses and ties on the doubling game. I did not record the video poker itself - I was only concerned with the double).

According to my data, it is 99.999% certain that English Harbour is not offering a fair doubling game in their Tens or Better video poker game.

Here are my results:
84 wins
151 losses
19 ties

Ignoring the ties (which push and therefore have no effect), there should be an equal number of wins and losses on the doubling game.

As you can see from 84 wins vs 151 losses, there were not: the results were hugely skewed in English Harbour's favour.

By use of the binomial theorem in Excel, =binomdist(84,84+151,.5,true), it appears that the chance of only 84 wins out of 235 trials with a fair (50/50) game is only 0.0000074.

0.0000074 equates to a 1 in 135,000 probability. Since this test was set up correctly to test the hypothesis (the video poker was cheating), the 254 hands combined with the probability give us a total of over 34 million hands required to expect one replication of this 254 hand run in an honest game.

However, the matter did not end there.

A handful of public-spirited forum members also tested the game. In total, 1537 hands were dealt, of which 522 won.

The probability of a run as bad as this is so low that it cannot be calculated in excel - somewhere in the region of 1 in 2,016,352,813,782,491,278,292,828,543,127,849,349.

This is what the original tester and another arithmetically-adept forum member had to say about this level of improbability:

The probability of winning 522 or fewer out of 1537 trials is 4.9*10^-37. It is the same order of magnitude as winning the lottery with a single ticket 5 weeks in a row.

For comparison, there are apparently 7.5x10^18 grains of sand on every beach in the world. So this is as likely as randomly picking a grain of sand from every beach in the world, and getting the same one three times.

English Harbour was contacted by Bryan Bailey of Casinomeister, and they came out with the following response:

We have concluded our review of the game play and randomness for all Video Poker games. Although the doubling component of Video Poker is theoretically deterministic, it's common knowledge that there are varying chances for winning and losing when picking a card out of four, to play against the card that is dealt face up.


It's important that the frequency distribution of the cards in an adequate sample set are evenly distributed for each position in the doubling game. We have found, taking several sample sets over different and varying lengths of time, that they yield in our opinion, a non biased distribution of the cards.

Game Play:

In theory, the number of Wins versus the number of losses and (excluding ties) will converge to 50% over a sample set that is large enough. Should small sample sets be used to measure this metric, then results will vary as seems to be the case tracing through this thread.

We trust, that we have responded adequately and any doubt in peoples' mind are put to rest.

English Harbour Management

Basically, this says that English Harbour believes the game is fair.

Not exactly a convincing argument in the face of the extreme evidence to the contrary.

They also claim that "small sample sets" will see varying results and are unreliable for testing fairness. Unfortunately, required sample size is in direct proportion to the improbability of the event in question. To give a graphic example: if you set out to test unfair dealing of dealer blackjacks, and your first ten hands are all dealer blackjacks, this is conclusive proof of non-random dealing, with a probability of a little under one in 14,000,000,000,000.

For this test, the 1500 hands are more than enough.

Michael Shakleford, the Wizard Of Odds, was contacted, and he had the following to say:

Yesterday, May 2, I was made aware of the issue possible irregularities in the doubling feature of Odds On software. Let me assure you that the Odds On management and myself are taking this very seriously. As soon as possible I plan to conduct an analysis of all double or nothing bets made since January 1. If necessary, Odds On will hire a third party to conduct the same study. Until we have had a chance to review the log files we can neither confirm nor deny the accusations.

I will say now that indeed I have auditing most of the Odds On casinos, including the English Harbour. Also, I agree with the original post that the probability of 84 or fewer wins in 235 resolved bets is 1 in 135929.

...see his post at Casinomeister.

Michael is in fact the official "auditor" for English Harbour:

All online games are produced using Vegas Technology and have been audited for fairness of play by an independent third party gaming expert, Mr. Michael Shackleford ASA, who's Gaming Audit practice is located in Las Vegas, Nevada.

The results of this ongoing audit indicate that the random number generator is truly random and accordingly, the game play results conform with accepted statistical norms.

To acknowledge this commitment to fairness, the "Certified Fair Gambling" seal has been applied to all games produced using Vegas Technology

Note: The most recent CFG audits are undertaken on a monthly basis

Whatever Michael's review shows, the fact remains that the results of this test were FAR more conclusive than even the results of the Casino Bar experiment, where 332 hands were tested with a probability of one in 238,000,000,000.

Over 1537 hands, the probability of a result like this in a fair game is one in 2,016,352,813,782,491,278,292,828,543,127,849,349.

English Harbour cheat at video poker.

4 Previous Comments

I have known for a long time that Mystic Lake Casino and Little Six Casino both have implemented non-random outcomes in the double-up feature in the game, double double bonus poker. I have logged near identical numbers to yours: 70% loses, 20% wins 10% ties. I have also logged more than 5 times, no 4 of a kind appearing in regular play after 300 hands. The odds of that occurring approach 0. Video Poker games have settings with respect to pay-outs. They can be set lower or higher. Obviously, lower favors the house. Just dont play video poker. Always assume the house is cheating because in America and if your playing at an Indian Casino, they probably are.

By Anonymous Anonymous, at 1:27 am  

1 in 135,000 probability is pretty low. Thanks for the info. I would definitely not play video poker in English Harbor.

By Blogger Andrea Fox, at 3:00 am  

The probability is in fact one in 2,016,352,813,782,491,278,292,828,543,127,849,349.

Here is the above number in words:

Two undecillion, sixteen decillion, three hundred and fifty two nonillion, eight hundred and thirteen octillion, seven hundred and eighty two septillion, four hundred and ninety one sextillion, two hundred and seventy eight quintillion, two hundred and ninety two quadrillion, eight hundred and twenty eight trillion, five hundred and forty three billion, a hundred and twenty seven million, eight hundred and forty nine thousand, three hundred and forty nine.

English Harbour has long since been forgiven by the cash-hungry casino affilaite industry.

By Blogger 100% Gambler, at 3:19 am  

Potawatomi in Milwaukee cheats too. They offer 99% pay boards with optimum play to entice play but the cards are not random. When I change players club cards is when I see the consistencies in the hands. I started noticing this on one particular machine and it was right after the announced they were planning a hotel expansion. Good figure, gotta get money from somewhere. Now, theyre screwing the players. I not only don't hit but I don't see anyone else hitting either. You don't need to run a test when you play 12 hours a day....you just know

By Anonymous Anonymous, at 2:39 am  

Post a Comment

May 2005 | June 2005 | July 2005 | September 2005 | October 2005 | November 2005 | December 2005 | January 2006 | February 2006 | March 2006 | April 2006 | May 2006 | August 2006 | October 2006 | January 2007 | February 2007 | March 2007 | May 2007 | June 2007 | July 2007 | January 2008 | February 2008 | March 2008 | April 2008 | June 2008 | July 2008 | September 2008 | October 2008 | December 2008 | January 2009 | February 2009 | March 2009 | May 2009 | June 2009 | July 2009 | August 2009 | September 2009 | October 2009 | November 2009 | December 2009 | January 2010 | February 2010 | March 2010 | April 2010 | May 2010 | June 2010 | July 2010 | August 2010 | October 2010 | November 2010 | December 2010 | January 2011 | February 2011 | March 2011 | April 2011 | May 2011 | June 2011 | July 2011 | August 2011 | September 2011 | December 2011 | February 2012 | May 2012 | July 2012 | August 2012 | March 2016 | April 2016 | June 2016 | November 2016 | December 2016 | March 2017 | May 2017 | June 2017 | August 2017 | August 2021 | October 2021 | May 2022 | December 2023 | May 2024 | Atom feed
© 2005 hundred percent gambling


• Online casino news


• Turbo-charged blackjack practice game


• Another hack resolved


• Contact email change
• 16 years and counting


• Can't split 10s?
• Overbetting
• EV charts
• The IPCA
• Basic strategy master
• Back to the future
• Site hack


• Better comp value
• Pit bosses are a pest
• 32Red buys Roxy Palace
• Winneronline is gone
• Paradise Win Casino
• Blackjack simple strategy


• Court refuses Ivey winnings
• Phil Ivey versus Crockfords
• 32Red does the right thing
• Wizard Of Odds sold
• Gambling addict sues Ritz
• Better blackjack conditions
• FL: the beat goes on
• Phil Ivey and the Borgata
• LadbrokesFOBT profit
• Chat with the Met
• "Bonus abuse" and the Met
• Casino industry crooks.
• Debate to curb the FOBTs
• Labour idea to ban FOBTs


• Ruby Fortune: terms buried
• Royal Vegas: bad outcome
• Russia illegalises gambling
• RV: player breaks no rules
• Gib casinos and UK laws
• The GGC (GRA) useless
• BetFred rigged games 9
• BetFred rigged games 8
• Betfred rigged games 7
• BetFred rigged games 6
• BetFred rigged games 5
• BetFred rigged games 4
• Phil Ivey: is he entitled?
• BetFred rigged games 3
• Betfred rigged games 2
• BetFred: rigged games 1
•  UK GLA Act 2013
• 888.com and Facebook
• Crockfords denies Phil Ivey
• Bad dealers
• Betfair Blackjack test
• Playtech software update
• Cheap blackjack
• Hippodrome Casino


• The UK's FOBT addiction
• Conan Casino beware
• Intercasino misleading
• Fortune Lounge
• UK Gambling Commission


• Small Claims Court
• Gamcare
• Full Tilt Poker saved
• Full Tilt ponzi scheme
• Casino Barcelona
• Irakli Kacharava
• Betfair processor no pay
• Full Tilt licensing meeting
• UK Gambling Commission
• Full Tilt Poker investors
• Full Tilt license suspended
• Twitter
• Betfair resolution
• Casino Web Scripts 2
• 32Red bonus marketing
• Casino Web Scripts 1
• Poker domains seized
• eCOGRA independent?
• Easystreet Sports theft
• Betfair to Gibraltar
• Rigged blackjack 2
• Betfair responses
• Rigged blackjack
• 888.com theft
• Betfair poker problem
• UK gambling controls
• Harry Reid


• eWallet Xpress
• Kevin Stillmock
• Blog back up
• Betfair happy hour
• Ladbrokes bonus increase
• Absolute Poker tricks US
• Absolute Poker rigged
• Last position no difference
• Basic strategy simplified
• Online casino bonuses
• Righthaven LLC
• Ladbrokes bonus rules
• Malta LGA nonsense
• Purple Lounge theft
• UK affiliates issue
• Online casino problems
• GPWA code of conduct
• One Club Casino problems
• Rushmore theft resolved
• Realtime Gaming cheats
• Absolute Poker Ultimate Bet
• Rushmore Casino theft
• Ask gamblers service
• Intercasino bonus terms
• Profitting from poverty
• Gambling dooms UK to ruin
• Want To Stop Gambling
• Gambling Therapy
• Gordon Moody Association
• Breakeven
• Online gambling jobs
• Gamblock
• Gamble Aware
• Gamblers Anonymous
• Gamcare
• Video poker auto hold
• Gambling Wages help offer
• Blackjack double down
• Intercasino rules
• Tradition Casino warning
• Tradition Casino problem
• Be The Dealer
• eCOGRA approved casinos
• UK underage gambling
• iGaming Super Show
• eCOGRA reputable portals
• eCOGRA exposed
• Slots Oasis warning
• Slots Oasis problem
• HR 2267 comments
• HR 2267 proposed bill
• Search fully functional
• Gambling hearing delayed
• Betfair download blackjack
• Betfair blackjack
• The Federal Wie Act
• Casino Rewards warning
• Kahnawake dumps GP
• GP dumps Microgaming
• UK online gambling
• Gambling checklist
• Online casino problems
• Gambling Grumbles
• Casino Rewards
• Brian Cullingworth
• Casino Wager Tracker
• Grand Prive affiliates
• Jackpots Heaven Casino
• Kahnawake commission
• UK gambling problem
• eCOGRA and Grand Prive
• Bet365 misleading bonus
• Mastercard and Visa
• Online gambling rules
• 32Red sign up bonus
• Ladbrokes data theft
• Ladbrokes unfair settlement
• Palace group bonus rules
• Grand Prive and eCOGRA


• Blackjack in the UK
• Seminole Hard Rock
• The APCW and MG
• Sportsbook.com
• Slot beaters slot strategy
• Rushmore Casino theft
• Paddy Power affiliates
• Slots
• 888.com problem
• Neteller contest winner
• 888.com bonus problem
• Casino Club meeting
• Online casino directory
• 32Red debit card bonus
• Blue Square Casino
• Budapest Affiliate Expo
• Rushmore payment issues
• Modern Blackjack volume 1
• Eurolinx certain insolvency
• Buzzluck winnings theft
• PaddyPower removed
• 32Red lawsuit
• William Hill Casino Club
• Betfair video poker
• APCW underage children
• Odds page updates
• VP Genius
• Video poker page updates
• Blackjack page updates
• Progression page updates
• Single deck page updates
• Betfair Playtech license
• Cherry Red Casino
• Online gambling debate
• William Hill & Teddy Sagi
• Rogue casinos section
• Pontoon correction
• Microgaming poker scandal
• Casino Club confiscation
• Casino Club steals €8000
• Villa Fortuna Casino
• Grand Prive affiliate issue
• CAP and Cardspike 2
• Virgin Casino bad results
• CAP and Cardspike 1


• iNetbet removal from site
• Mario Galea and Malta LGA
• Cold Mountain Resort
• The AGCC
• Moneybookers privacy
• Virtual Casino rebranding
• Captain Jack Casino
• Royal Ace Casino
• Ringmaster Casino
• Catseye Casino
• Lucky Palm Casino
• Pharaohs Gold Casino
• Goldstream Casino
• Plantet 7 Casino
• Betfair bonus confiscation
• Malta LGA worthless
• The GIA
• Interwetten theft of £5000
• Lucky Ace winnings stolen
• The KGC and Absolute


• HippoJo Casino
• Microgaming All Aces VP
• Neteller issues
• Lou Fabiano responds
• Lou Fabiano selling stats
• Betfair Zero Lounge
• ICE 2007 brief visit
• RTG cancels ICE visit


• Crystal Palace Casino theft
• eCOGRA & Jackpot Factory
• English Harbour cheating
• Boss Media single deck
• Bella Vegas / Grand Prive
• The KGC worthless
• Gambling Federation
• Playtech sued
• Meeting Andrew Beveridge
• Playtech confirmed listing
• African Palace Casino
• G-Fed ICE discussion
• Playtech ICE meeting
• Playtech issues escalation
• Chartwell hands off


• Crystal Gaming silence
• Price Waterhouse Cooper
• Crystal Gaming flotation 2
• Vegas Frontier
• Crystal Gaming flotation 1
• Playtech public listing
• African Palace & Indio
• Kiwi Casino
• Rochester Casino
• G-Fed theft 2
• Warren Cloud best avoided
• Golden Palace stupidity 3
• Golden Palace stupidity 2
• G-Fed theft 1
• Golden Palace stupidity 1
• Russia online expansion
• Wan Doy Pairs Poker
• Microgaming CPU usage
• Net Entertainment RNG
• Cryptologic & William Hill
• Casino growth slow
• English Harbour paying
• Fraudster or not
• Blackjack surrender
• Integrity casino group audit