Double-Deck H17 DAS basic strategy chart

With this chart the house edge is 0.393%. Rules: 2 decks, dealer hits soft 17, double after split, no surrender, blackjack pays 3:2. Perfect play for the exact cards (impossible to memorize) would bring it to 0.382%. That makes it number 9 of the 26 games on this site, ranked from the best for the player.

Practice these rules House edge with these rules

Dealer’s up card

Hard totals
Your hand	2	3	4	5	6	7	8	9	10	A
5–8	H	H	H	H	H	H	H	H	H	H
9	D	D	D	D	D	H	H	H	H	H
10	D	D	D	D	D	D	D	D	H	H
11	D	D	D	D	D	D	D	D	D	D
12	H	H	S	S	S	H	H	H	H	H
13	S	S	S	S	S	H	H	H	H	H
14	S	S	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	S

Soft totals
Your hand	2	3	4	5	6	7	8	9	10	A
A,2	H	H	H	D	D	H	H	H	H	H
A,3	H	H	D	D	D	H	H	H	H	H
A,4	H	H	D	D	D	H	H	H	H	H
A,5	H	H	D	D	D	H	H	H	H	H
A,6	D	D	D	D	D	H	H	H	H	H
A,7	Ds	Ds	Ds	Ds	Ds	S	S	H	H	H
A,8	S	S	S	S	Ds	S	S	S	S	S
A,9	S	S	S	S	S	S	S	S	S	S

Pairs
Your hand	2	3	4	5	6	7	8	9	10	A
2,2	P	P	P	P	P	P	H	H	H	H
3,3	P	P	P	P	P	P	H	H	H	H
4,4	H	H	H	P	P	H	H	H	H	H
5,5	D	D	D	D	D	D	D	D	H	H
6,6	P	P	P	P	P	P	H	H	H	H
7,7	P	P	P	P	P	P	P	H	H	H
8,8	P	P	P	P	P	P	P	P	P	P
9,9	P	P	P	P	P	S	P	P	S	S
10,10	S	S	S	S	S	S	S	S	S	S
A,A	P	P	P	P	P	P	P	P	P	P

HHit
SStand
DDouble, else hit
DsDouble, else stand
PSplit
RSurrender, else hit
RsSurrender, else stand
RpSurrender, else split

How to read it

Find your hand on the left and the dealer’s up card on top. “Else” is the play when the first one isn’t allowed, for example after you have taken a card.

What changes from 6-Deck H17 DAS

The closest common game is 6-deck, dealer hits soft 17, double after split, at 0.619%. These rules lower the house edge by 0.226%.

Rule here	Change in house edge
2 decks instead of 6	-0.226%

5 chart cells change

Hard 9 against 2: Double, else hit instead of hit
Soft 14 (A,3) against 4: Double, else hit instead of hit
Soft 17 (A,6) against 2: Double, else hit instead of hit
Pair of 6s against 7: Split instead of hit
Pair of 7s against 8: Split instead of hit

Tables one rule away

Each of these games changes a single rule from this one. The last column is what that rule does to the house edge.

Rule there	House edge	Change
1 deck instead of 2Single-deck, dealer hits soft 17, double after split	0.046%	-0.347%
6 decks instead of 26-deck, dealer hits soft 17, double after split	0.619%	+0.226%
8 decks instead of 28-deck, dealer hits soft 17, double after split	0.647%	+0.254%
Dealer stands on soft 17Double-deck, dealer stands on soft 17, double after split	0.194%	-0.199%
No double after splitDouble-deck, dealer hits soft 17, no double after split	0.537%	+0.144%
Late surrenderDouble-deck, dealer hits soft 17, double after split, late surrender	0.330%	-0.063%
Blackjack pays 6:5Double-deck, dealer hits soft 17, double after split, blackjack pays 6:5	1.767%	+1.373%

All strategy charts

How these numbers were computed

Our blackjack engine plays out every hand against the exact cards left in the shoe, with the dealer’s exact chances of each final total, and picks the best play for each total over all the hands that reach it. Only splits use a small approximation. Its house edges agree with published combinatorial results to within 0.005% of the bet. Figures assume a fresh shoe every round, like a continuous shuffler; a cut card adds a little to the house edge.

Your hand	2	3	4	5	6	7	8	9	10	A
A,2	H	H	H	D	D	H	H	H	H	H
A,3	H	H	D	D	D	H	H	H	H	H
A,4	H	H	D	D	D	H	H	H	H	H
A,5	H	H	D	D	D	H	H	H	H	H
A,6	D	D	D	D	D	H	H	H	H	H
A,7	Ds	Ds	Ds	Ds	Ds	S	S	H	H	H
A,8	S	S	S	S	Ds	S	S	S	S	S
A,9	S	S	S	S	S	S	S	S	S	S

Your hand	2	3	4	5	6	7	8	9	10	A
A,2	H	H	H	D	D	H	H	H	H	H
A,3	H	H	D	D	D	H	H	H	H	H
A,4	H	H	D	D	D	H	H	H	H	H
A,5	H	H	D	D	D	H	H	H	H	H
A,6	D	D	D	D	D	H	H	H	H	H
A,7	Ds	Ds	Ds	Ds	Ds	S	S	H	H	H
A,8	S	S	S	S	Ds	S	S	S	S	S
A,9	S	S	S	S	S	S	S	S	S	S

Your hand	2	3	4	5	6	7	8	9	10	A
A,2	H	H	H	D	D	H	H	H	H	H
A,3	H	H	D	D	D	H	H	H	H	H
A,4	H	H	D	D	D	H	H	H	H	H
A,5	H	H	D	D	D	H	H	H	H	H
A,6	D	D	D	D	D	H	H	H	H	H
A,7	Ds	Ds	Ds	Ds	Ds	S	S	H	H	H
A,8	S	S	S	S	Ds	S	S	S	S	S
A,9	S	S	S	S	S	S	S	S	S	S