Average Expected Rate Of Return

Blackjack
2. Now, square each bet size, multiply the bets squared by their respective number of hands played then add up these products. It looks like this: 22 x 60 = 240 72 x 8.5 = 416.5
122 x 13.5 = 1944
2600.5
3. Now, take the square root of this number and multiply it by 1.1, like this: √ 2600.5 x 1.1 = 56.094. Finally, divide this number by the square root of the number of hands played (per 100).
56.09 / √82 = $6.19
This is your standard deviation, in dollars, per hand.To find your standard deviation, in dollars, for any number of hands, multiply your standard deviation per hand times the square root of the number of hands.Examples:The standard deviation on 100 hands = 6.19 x √ 100 = $61.90The standard deviation on 1000 hands = 6.19 x √ 1000 = $195.74The standard deviation on 10,000 hands = 6.19 x √ 10,000 = $619.00

Playing Multiple Hands While Card Counting

If you play multiple simultaneous hands, you may estimate your average bet, gain/hand and win rate, by multiplying the number in the Hands column by the number of simultaneous hands you are playing at that count. Do not use this method, however, to estimate your standard deviation.
If, for instance, you play two hands of four units each at a specified true count, you would underestimate the standard deviation if you simply added the extra hands into your calculations. This is due to the fact that simultaneous hands will have more of a tendency to have the same result, since they are both played vs. the same dealer hand.
If you instead estimated your standard deviation as if two 4-unit hands were a single 8-unit hand, you would overestimate the standard deviation. The actual standard deviation would fall somewhere between these two results.
A simple way to estimate your standard deviation on two simultaneous hands is to simply estimate the standard deviation on one hand that is 75% of the total amount bet on both hands. In the example above estimate your standard deviation on two 4-unit hands as if you were playing one 6-unit hand.
For three simultaneous hands, estimate your standard deviation as if you were playing one hand that is 60% of the total amount bet. In other words, with three simultaneous hands of $10 each, take 60% of the $30 total bet and compute your standard deviation as if playing one hand of $18. Again, this is a simplification, but it will give you a good ballpark estimate.

Accuracy

All of the frequency distributions, estimates of win rates, standard deviations, etc., in this book are approximations of what human players might expect in casino play. If the charts herein estimate your win rate at $20 per hour, then your actual win rate is probably between $15 and $25 per hour.
Don’t assume pinpoint precision. Even if we were to run a billion-hand computer simulation to obtain a highly precise estimate for a specific counting system, it would not necessarily provide a better estimate of your expectations in a real-world casino.
Casino dealers vary their levels of penetration. Different numbers of players at the table may affect the shuffle point, change the number of hands dealt per hour, etc. And even the best card counters make errors in 'rounding off' their count adjustments and they apply different amounts of betting and playing strategy 'camouflage' as needed in the casinos where they play.
Use the data in these charts to compare the profit opportunities in the games available to you, determine the betting spread you need to get a sufficient edge over the house, and estimate your bankroll requirements.
Finally . . .
The top blackjack pros are not all mathematicians, but they all do understand the basic math and logic of the game. If you study the concepts and the charts presented in this book, you will get a very good feel for the profitability of any 6-deck game you find.
Look at the kinds of betting strategies you’ll need to beat the 6-deck games with 50%, 65%, 75% and 85% penetration. If the penetration is poor, look for any possibilities of beating the game by leaving the table at negative advantages. Consider the possibilities of getting a bigger spread by playing two or more hands at favorable counts. If there’s no practical way to get a healthy edge on the house, then keep your money in your pocket.

Frequently Asked Questions

Q: Why do you provide so much information on games and betting strategies that don’t win? Everyone knows that bad penetration and small betting spreads don’t work for card counters.
A: There are many card counters, perhaps even a majority of them, who do not have professional aspirations, but play at moderate to high stakes in order to acquire casino comps. These players are primarily interested in knowing how to reduce the house edge to a break-even point.
Also, there are many books on the market that poorly explain the betting spreads needed to beat various games. Many amateur card counters believe that they can beat most games with a 1-to-4 spread. My goal in providing these Beat the Deck reports to players is to show what works, how well it works, and what doesn’t work, in any game with any level of penetration.
Q: Is there a quick way to use these charts to judge a game’s profit opportunities 'at a glance?'

Expected Rate Of Return

A: I scan the Win Rate % line first, looking for an advantage of about 1% or better. If I find it, I then look at the Hands Bet/100 in that column. The bigger this number, the better. If the Hands Bet/100 is less than 30, you’ll probably spend too much time standing around watching games, waiting to place a bet. The % advantage might be good, but your hourly unit win may be too small to be worth your time.
Q: Do you have any guidelines for judging when the standard deviation is tolerable?
A: The primary guideline is your own personal bankroll. Casino blackjack is a fairly high-risk investment for a card counter. The 'long run' often takes a long time coming. A player who is trying to get an edge over the house in the neighborhood of 1% should look for a standard deviation where the expected win after 100 hours (10,000 hands) is at least half of one standard deviation, and after 1000 hours (100,000 hands), the expected win is twice as much as one standard deviation.

Apple Expected Rate Of Return

In other words, when looking through the charts for a good betting strategy, I look at the unit wins for 100 hours and 1000 hours, compared to their S.D.s. If my unit win expectation is 100 units after 100 hours, then I don’t want the S.D. to be much more than 200 units. If my unit win expectation after 1000 hours is 1000 units, then I don’t want the S.D. to be much more than 500 units. The greater the number of decks, and the worse the penetration, the more difficult it is for a game to meet these criteria.
Q: Why is the Win Rate % higher for one blackjack betting system, when the Units/Hour is higher for another betting system?
A: In a case like this, the system winning more units per hour is betting more units per hour. This may be due to either betting on more hands/100 seen, or increasing to bigger bets at smaller advantages. Whenever you see this, you can find the answer in the chart data by looking at how many hands were bet by each system, and/or at what advantage did each system raise its bets. ♠

Expected Rate Of Return Formula


For more information on how to win at blackjack and optimal betting strategies for card counters, see Arnold Snyder's Blackbelt in Blackjack. Arnold Snyder's Beat the X-Deck Game reports are available at Cardoza Books.
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