I questioned a manager about the fairness of the machines and he was guarded in his responses but believed they do use a RNG and that there is a house advantage, but he wouldn't say how much, and they do not make audits available to the public. For what it's worth I questioned one of the technicians at Harrah's one time and he claimed that they have a number of different adjustments they can make to affect payouts, not just the pay table. But adjusting this would change the rules of the game such as BJ only pays 6:5 or something similar.

I was able to find an owners manual for these machines at which appears to indicate the only adjustment that could be made to the machine affecting payout percentages would be the pay table. Looking at the risk of ruin charts at which are based on less favorable rules this looks to me statistically improbable. In the worst losing streak I encountered I estimate I played no more than 7500 hands and the dealer got 275 units ahead of me as I played near perfect strategy. As just one example, I played a machine until I was down EXACTLY 100 units from the peak I had reached sometime earlier, and then began a wild winning streak straight back to the top. I keep track of units of wins vs losses and have noticed patterns numerous times as if the machines run in cycles. I find it very difficult to believe the cards are random.

I have played these machines for hours on end so I know how they play. Also, I'm sure there could be more composition-dependent exceptions for split hands, but I know that could get quite complicated. I saw your charlie chart at but I don't think it was designed for single deck. Wizard, I would love to see a composition-dependent strategy for single deck with a 6 card charlie. There is a double-up high-low card feature, but this seems like a waste of time to me as the odds are 50-50 and using it would only exaggerate wins or losses depending on how lucky you got. The bet spread is fairly narrow at $2 up to $50 in $2 increments, so the poor schmuck betting a martingale would quickly run into the maximum bet. I don't know if this is normal for charlie rules but the dealer also stops after drawing 6 cards so if you stand on 16 and the dealer draws 6 cards to 15 then you win. The rules are single deck, shuffle after every hand, dealer stands on soft 17 and peaks for BJ, BJ pays 3:2, double on 9 10 11, no surrender, split to 2 hands only, no double downs or BJ after the split but you can hit split aces, and a 6 card charlie to boot. It is made by Pot O Gold and named Black Gold 21. I have been playing a video blackjack game at Harrah's Cherokee in NC which should have a small player advantage using optimal strategy if the cards are truly random.

Casino game with pot of gold