888 Casino Blackjack How Many Decks

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Introduction

(Most common is single, double, six, and eight decks.) Casinos may allow players to double down on any initial hand or restrict doubling to only hard hands. Some casinos allow you to double down after pair splitting pairs while others won’t. The payoff for a player blackjack could be 3-2 or 6-5. European Blackjack – 2 decks of cards are used in European Blackjack games. Each of the first 2 cards dealt to the player is face up. Each of the first 2 cards dealt to the player is face up. The dealer receives 1 face up card and 1 face down card (hole card) once the player has decided whether to hit, stand, split, double et cetera.

In playing blackjack online one problem I often face is not knowing how many decks are being used. This is a particular problem with Real Time Gaming casinos. The help files often do not indicate this rule, as well as other rules, and customer support are notorious for giving incorrect information on their own rules. So I devised a test to help determine the number of decks. This test is based on the player's first two cards and the dealer's first two.

The following table shows the probability for various configurations of the initial four cards in blackjack. Note the probabilites for a suited pair. Of all the hands I feel this is the best to test for, given both it's frequency and correlation to number of decks.

4-Card Hand1 deck2 decks4 decks6 decks8 decks
4 singletons0.6761100.636920.6185040.6125300.609573
Non-suited pair0.3042500.2866140.2783270.2756380.274308
Suited pair0.0477690.0695820.0765660.080006
Two non-suited pairs0.0103720.0097710.0094880.0093970.009351
Two suited pairs0.0002710.0005930.0007250.000796
Two pair - 1 suited0.0032570.0047440.005220.005455
3 of a kind - 3 suits0.0092200.0086850.0084340.0083530.008312
3 of a kind - 2 suits0.0065140.0094880.0104410.010910
3 of a kind - 1 suit0.0005270.0007730.000909
4 of a kind - 4 suits0.0000480.0000450.0000440.0000440.000043
4 of a kind - 2 suits (3&1)0.0000330.0000480.000057
4 of a kind - 2 suits (2&2)0.0000170.0000370.0000450.000050
4 of a kind - 3 suits0.0001360.0001980.0002180.000227
4 of a kind - 1 suit0.0000010.0000020.000003
Total11111

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To determine the number of decks in an online blackjack game keep a tally of both the total number of hands played and the number of suited pairs. Only count a hands as a suited pair if the other two are singletons. For example one suited pair and one non-suited pair does not count. In a single deck game the ratio of suited pairs to total hands will obviously be zero. In double deck this ratio will be about 4.8%. In a 4-deck game the ratio increases to 7.0%. After that the differences are too subtle are to tell without a gigantic sample.

888 Casino Blackjack How Many Decks

Of course if you ever notice three of the same card on the screen at once that rules out a double deck game immediately. Despite my lack of faith in customer support knowing their own rules I would suggest at least asking. If they give you an incorrect answer, and you can prove it, you may get some free money in your account as a way of thanks. This has happened to me several times.

Unfortunately it takes a fairly large sample size to have confidence in the number of decks between 2 and 4. After 250 hands the probability that the sample mean in a 2-deck game will be greater than 6.96% (the 4-deck theoretical mean) is 5.29%. Likewise the probability that the sample mean in a 4-deck game will be less than 4.78% (the 2-deck theoretical mean) is 8.76%. Increasing the sample size to 500 these numbers become 1.11% and 2.76%. At 1000 the numbers are 0.06% and 0.34%.

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888 Casino Blackjack How Many Decks Installed

How
Written by: Michael Shackleford

Blackjack is a popular casino game in online and land-based casinos.

It has drawn many players from all over the world both newbies and gambling experts.

Blackjack, just like any other casino game, has set of rules during game-play that players need to follow to be able to walk away with huge winnings from the casino.

Counting cards is one of the popular techniques that players use to lower the house edge.

In this article we discuss, the number of decks in blackjack games and how counting cards work.

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