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Double Attack Blackjack


Double Attack Blackjack is a variant of the standard Blackjack game. Double Attack Blackjack uses Spanish decks, which are a standard deck of 52 cards with the four 10 pip cards. The Face cards (also considered a value of 10 when playing Blackjack) are still in the deck. This means the deck has a total of 48 cards.

We are currently aware of Double Attack Blackjack being offered by the following online casino softwares – Playtech and IGT.

Play Structure

Differences to standard Blackjack and rules that are standard to the online game;


·         The dealer’s first card is dealt before any other cards.

·         After the dealer’s first card is dealt the player is given the option to Double – or ‘Double Attack’ – before any other cards are dealt.

·         Blackjack (a Ten card and an Ace dealt as the first 2 cards) is paid at 1 to 1.

·         Insurance pays 5 to 2.

·         Played with a Spanish deck – 10 pip cards removed.

·         Player may Double at any point before Standing or Busting.

·         Player can Double once per hand (excluding Double Attack).

·         Player can choose to Double only the initial bet or both the initial bet and the Double Attack bet.

·         Player can Surrender a hand at any point before Standing or Busting.

·         The dealer must Stand Soft 17.

·         Double After Split allowed.

·         Double on 2 card 9, 10 and 11 only.

·         8 decks.

·         Re-Split to 4 hands.

·         No Re-Split Aces.


Other than the above the game functions as a standard Blackjack game in terms of the play of hands and how wins are decided.

Rule Variations

Over and above the above mentioned rules, the following online software providers offer slightly different rules as detailed;

Playtech  – Standard rule set shown above.

WagerWorks – No Resplits, Insurance pays 3 to 1.

Optimal Strategy

There are two different decision sets to be considered when playing Double Attack Blackjack. The first decision relates to whether or not to Double Attack after the first dealer card is dealt, then after a Double Attack has been made or declined, the standard Basic Strategy decisions that are required for all Blackjack games.

Double Attack Strategy

Playing optimally, the player should take the Double Attack option any time the dealer shows a 2-8 upcard and not to take the Double Attack when the dealer shows 9-A.

Basic Strategy

  Dealer’s Upcard
Player’s Hand 2 3 4 5 6 7 8 9 T A
5-8 H H H H H H H H H H
9 H H H H D H H H H H
10 D D D D D D Dr16 H H H
11 D D D D D D Dr16 Dr16 Dr16 Dr17
12 H H H H H H H H H H
13 H H H H H H H H H H
14 H H S S S H H H H H
15 S S S S S H H H H H
16 S S S S S H H H H H
17 S S S S S S S S S R
18+ S S S S S S S S S S
A2 H H H H H H H H H H
A3 H H H H H H H H H H
A4 H H H H H H H H H H
A5 H H H H D H H H H H
A6 H H D D D H H H H H
A7 S S S Ds Ds S S H H H
A8 S S S S S S S S S S
A9 S S S S S S S S S S
22 H P P P P P H H H H
33 H P P P P P P H H H
44 H H H H H H H H H H
55 D D D D D D Dr16 H H H
66 H H P P P H H H H H
77 P P P P P P H H H H
88 P P P P P P P P P P
99 S S P P P S P P S S



Code Best Play
H Hit
S Stand
D Double else Hit
Dr16 Double else Hit, Surrender after Double if total less than 16
Dr17 Double else Hit, Surrender after Double if total less than 17
Ds Double else Stand
P Split
P* Split, Follow post Double Surrender strategy after AA split when not possible to Hit
R Surrender


When playing the WagerWorks* version of Double Attack Blackjack, the lack of Resplits does not make any difference to the strategy, however the 3 to 1 payout on Insurance actually makes this bet player favourable (unlike standard Blackjack). As such you should take Insurance any time there are no ten cards (J-K) visible on the table.

* The WagerWorks game appears to have been taken offline.

House Edge*

The House Edge for Double Attack Blackjack is shown below for each known software provider;

Playtech – 0.35%
WagerWorks – 0.36%

Fairness Calculator

Below you can find a calculator to allow you to check the fairness of your wins/losses when playing Double Attack Blackjack.

Fairness Calculator

Super 7
Single Deck
Standard, Super 7s, ...
Single Deck
Single Deck
Ties Win
Standard, Progressive
Single Deck
Single Deck with CD
Video: 4 Decks
Video: 8 Decks
Standard, Lucky 7
Single Deck
Single Deck
6 Deck
Anything Goes
Double Deck
Single Deck
Blackjack Swap
Atlantic City
European, Streak, Pairs
Vegas DT, Bonus
Vegas Single Deck
Vegas Strip
Standard, Pro, Mini
European, Progressive
Perfect Pairs
Vegas Strip
Standard / Vegas
Atlantic City
VC Games
Single Player, BP, HL
Single Deck
Multi Player, Multi-Hand
Standard, Progressive
21 Duel
Double Attack
4 Decks
6 Decks
8 Decks (Standard)
European, 6D
European, 8D
Pontoon, 2D (Standard)
Pontoon, 8D
Bodog (6D with Sur.)
Standard, Multi-hand
Live, Early Payout
20 Bonus
Double Attack
European, 21+3
Hot Streak
Table, Multi-hand
Top Hat
Blackjack Switch

Chance of: Loss Win
Size of Loss: 
Size of Win: 
Bet Size: 
Multiple Hands: 
Player Hands: 
Dealer Hands: 
House Edge (%): 
Standard Deviation: 
Corr. Between Hands: 
Final Bet : Initial Bet Ratio: 
Expressed: per Hand per Wager

*This fairness calculator will assume that you’ve been playing with the optimal strategy detailed above. If you have not then the calculator will NOT return accurate results.

Winning Strategies


Double Attack Blackjack is likely to be vulnerable to all of the standard advantage play techniques that standard Blackjack can be beaten by. Strategies information for gaining an edge over Double Attack Blackjack games are not in common circulation (we are aware of no publications discussing these issues either on or offline) however Eliot Jacobson has confirmed that Card Counting can be deployed against Double Attack.

Hole Carding will not be possible due to the lack of Hole Card.


There are several methods of legitimately gaining an advantage playing online Double Attack games. By and large these involve the use of promotions, bonuses and comp point systems as the games by themselves – assuming the game is functioning in a correct fashion and there are no errors in the paytable – will not provide any additional information about the cards and shuffles after every hand.

It should be noted that online advantage play is not specific to Double Attack Blackjack and in recent years the wagering requirements for player’s choosing to play any table game has inflated to the point that Double Attack is now often a sub-optimal choice for the player. For more information on beating online casinos see

* All ‘House Edge’ figures in this article are based on the ‘loss per unit wagered’ rather than ‘loss per initial bet’.


The United Kingdom of Great Britain and Northern Ireland sits to the north-west of mainland Europe. The United Kingdom shares a border with The Republic of Ireland and has coasts on the Atlantic Ocean, Celtic Sea, North Sea, Irish Sea and English Channel. The population of the UK is approaching the 67.6 million mark leading to a fairly densely populated land mass. The gambling sector in the United Kingdom is entirely regulated and licensed by the UKGC – the United Kingdom Gambling Commission. Should players resident In the UK wish to gamble with foreign based operators there is no history of this being treated as a criminal offence, but high levels of protection exist for UK residents playing with UK licensed operators.


The above information is what we believe to be the the legal status of online gambling, however information on this topic is limited and hard to find. We accept no liability for any errors or ommissions. It is the reader’s responsibility to ensure that they know the legality of online gambling in their country before engaging with any online gambling service.