Blackjack Strategy when using Multiple Decks

When playing blackjack, the number of decks in play obviously has an effect on the outcome. In a single deck game, the maths is far easier and the game actually has the lowest casino advantage. With multiple decks (the most common blackjack game), you need to play a perfect strategy game to break even or win.

Drawing and Standing

When to Hit a Hard Hand

Your Hand	Dealer’s Up Card
X	2	3	4	5	6	7	8	9	10	A
17 – 20	X	X	X	X	X	X	X	X	X	X
13 – 16	X	X	X	X	X	H	H	H	H	H
12	H	H	X	X	X	H	H	H	H	H
4 – 11	H	H	H	H	H	H	H	H	H	H
H = always draw (hit) OR X = Stand (draw no cards)

When to Hit a Soft Hand

Your Hand	Dealer’s Up Card
X	2	3	4	5	6	7	8	9	10	A
19 – 20	X	X	X	X	X	X	X	X	X	X
18	X	X	X	X	X	X	X	H	H	H
13 – 17	H	H	H	H	H	H	H	H	H	H
H = always draw (hit) OR X = Stand (draw no cards)

Doubling Down

When to Double Down on a Hard Hand

Your Hand	Dealer’s Up Card
X	2	3	4	5	6	7	8	9	10	A
12	X	X	X	X	X	X	X	X	X	X
11	D	D	D	D	D	D	D	D	D	X
10	D	D	D	D	D	D	D	D	X	X
9	X	D	D	D	D	X	X	X	X	X
8	X	X	X	X	X	X	X	X	X	X
D = always double down OR *D* = double down except on 6,2 OR X = Stand (draw no cards)

When to Double Down on a Soft Hand

Your Hand	Dealer’s Up Card
X	2	3	4	5	6	7	8	9	10	A
19 – 20	X	X	X	X	X	X	X	X	X	X
17 – 18	X	D	D	D	D	X	X	X	X	X
15 – 16	X	X	D	D	D	X	X	X	X	X
13 -14	X	X	X	D	D	X	X	X	X	X
D = always double down OR *D* = double down except on 6,2 OR X = Stand (draw no cards)

Splitting

Your Hand	Dealer’s Up Card
X	2	3	4	5	6	7	8	9	10	A
A,A	SP	SP	SP	SP	SP	SP	SP	SP	SP	SP
10,10	X	X	X	X	X	X	X	X	X	X
9,9	SP	SP	SP	SP	SP	X	SP	SP	X	X
8,8	SP	SP	SP	SP	SP	SP	SP	SP	SP	SP
7,7	SP	SP	SP	SP	SP	SP	X	X	X	X
6,6	*SP*	SP	SP	SP	SP	X	X	X	X	X
5,5	X	X	X	X	X	X	X	X	X	X
4,4	X	X	X	*SP*	*SP*	X	X	X	X	X
3,3	*SP*	*SP*	SP	SP	SP	SP	X	X	X	X
2,2	*SP*	*SP*	SP	SP	SP	SP	X	X	X	X
SP = always split OR *SP* = split only when doubling down is allowed after splitting OR X = Stand (draw no cards)

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