Blackjack house advantage percentage
The house has an advantage in blackjack simply because the player has to draw first and if he busts, the player automatically losses regardless if the dealer subsequently busts in the same round. This is the casino's solitary advantage in blackjack and if everything were equal, the house edge in blackjack would be about 8 percent. In some cases, using a basic strategy can reduce the house edge to just %! If you want to lower the house advantage, studying the basics of blackjack strategies is a good place to start. In addition to basic strategy charts, several strategies have been developed to . House Advantage with Multiple Number of Decks. The number of 52 card decks in a game of blackjack influences the house edge. In some cases, the odds increase in favor of the casino when more decks are used. The advantage edge can be as much as 1% towards the casino and this is a big number in terms of odds over the long term.
The Blackjack Odds and the House Advantage
Penetration is one of the biggest factors that will determine how big of an edge you can hope to gain over the house. Below you will find all the information you need to quickly calculate the basic strategy house edge for any number of decks and any set of blackjack rules. Such rules would be surrender, doubling after splitting allowed, resplitting aces allowed, etc. The real world equivalent of the house edge is known as the house hold, which is also the hold percentage. You may resplit any pair except aces.
This article will give you simple guidelines you can follow that will help to keep you from throwing your money away in unbeatable games. There are four distinct conditions of any blackjack game that directly affect the profit potential for card counters:. The number of decks in play. There are about two dozen common rule variations, and dozens more uncommon variations, in U.
Crowd conditions. You may be the only player at the table, or one of as many as seven. Crowded tables mean fewer hands per hour and lower earnings for card counters. Depth of deal, or deck penetration, between shuffles. Of all of these table conditions, penetration is by far the most important. When I published my first book, The Blackjack Formula, in , many players were skeptical of the weight I gave to the effect of deck penetration. These days, any decent book on card counting will tell you that penetration is the name of the game, but before my book in no one knew!
None of the books on card counting had ever mentioned the importance of deck penetration before. The general rule is this: The shallower the penetration, the larger the betting spread you must use to beat the game. With a bad set of rules and poor penetration, you may not be able to beat the game with any spread. For more information on penetration, and a formula for quickly and easily calculating the profitability of any blackjack game, see the Snyder Profit Index in Chapter 11 of Blackbelt in Blackjack.
This rest of this article will deal with the number of decks in play and the effects of rules on the profitability of blackjack games. Below you will find all the information you need to quickly calculate the basic strategy house edge for any number of decks and any set of blackjack rules.
One of the keys to beating the casino is knowing how large their initial advantage is against you. If the output is negative, that means the player has the advantage off the top. Remember that this is assuming perfect basic strategy. Below is a chart that shows how each rule affects the house edge. So essentially each bet you make is worth about 50 cents to the casino. But to the casino, they just made 50 cents. So in the short term, players win and players lose, but in the long term you cannot escape the math and the casino will wait patiently for your luck to run out because they know their house edge is guaranteed in the long run.
Penetration is one of the biggest factors that will determine how big of an edge you can hope to gain over the house. Penetration is either expressed as the number of decks cut out of play or the percentage of cards that are actually dealt. All of the rules are identical and the spread is identical in each scenario but this game can go from insanely good to unplayable just by where the dealer puts that silly little plastic card.
Just in a 1. This principle is the exact reason why CSMs are not vulnerable to card counting. A CSM game is the equivalent of cutting off 5 decks of a 6 deck shoe! Tour Membership. Become a Member. Blackjack Calculator. Note If the output is negative, that means the player has the advantage off the top. Rule Change in House edge one deck 0. As published in Professional Blackjack. Stanford Wong.
Much of this report will seem too technical for the average player. Just follow the recommendations and you should have no trouble. The more technical explanations are for the math-heads who will hopefully appreciate the full story.
At the time of this writing August, the only U. However, it is offered in casinos in Eastern Europe, Asia, and elsewhere. In the summer of , the developer may market this rule variation to other U. The developer, Mr. Bets on the regular blackjack hand are placed in the large central circle the normal betting spot. The side bet circles will be labelled "over" and "under.
The player who places a bet in the over circle is betting that his first two cards will total more than The player who places a bet in the under circle is betting that his first two cards will total less than These are even money bets. King, Queen, Jack and 10 all count as ten. All other denominations count as their face values. The amount bet on over or under may never exceed the amount bet on the blackjack hand.
By considering all possible two-card totals, it is a straightforward calculation to count how many of these hands total over 13, and how many total under The house obtains its advantage from the fact that the house always wins over and under bets on player totals of exactly The house has the advantage either way in the long run.
However, it is also obvious that this house advantage will change throughout the course of the game. An excess of high cards remaining to be dealt would make a hand totaling over 13 more probable. And an excess of low cards will make an under 13 hand more probable. In order to devise an optimal card counting system that will tell us when the over or under bets have become advantageous, we must first figure out the effects of removing each of the individual cards.