Blackjack strategies
Next, I will be showing you the basic strategy for blackjack, which is good for decreasing the house advantage, possibly bringing it down to 0%. With a little practice the table can be easily memorized which shows the steps that need to be taken depending on what cards you and the dealer have. The interpretation for the letters can be found under the table.
DEALER CARDS


2

3

4

5

6

7

8

9

10

A


Y C 
< 7

H

H

H

H

H

H

H

H

H

H

8

H

H

H

D

D

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


13,14,15

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


A9

S

S

S

S

S

S

S

S

S

S


A8

S

S

S

S

D

S

S

S

S

S


A7

S

D

D

D

D

S

S

H

H

S


A6

D

D

D

D

D

H

H

H

H

H


A5, A4

H

H

D

D

D

H

H

H

H

H


A3, A2

H

H

D

D

D

H

H

H

H

H


AA

SP

SP

SP

SP

SP

SP

SP

SP

SP

SP


1010

S

S

S

S

S

S

S

S

S

S


99

SP

SP

SP

SP

SP

S

SP

SP

S

S


88

SP

SP

SP

SP

SP

SP

SP

SP

SP

SP


77

SP

SP

SP

SP

SP

SP

H

H

S/SU

H


66

SP

SP

SP

SP

SP

H

H

H

H

H


55

D

D

D

D

D

D

D

D

H

H


44

H

H

H

D

D

H

H

H

H

H


33

H

H

SP

SP

SP

SP

H

H

H

H


22

H

SP

SP

SP

SP

SP

H

H

H

H


2

3

4

5

6

7

8

9

10

A


DEALER CARDS

H = HIT
S= STAND
D=DOUBLE
SP=SPLIT
S/SU=SURRENDER if able, otherwise stand
Card counting
This technique can offer a 2% advantage to the player. The dealers often will not wait until the cards run out but will shuffle before that happens. In online blackjack the machine may shuffle in every round. In the live dealer version, the dealer may shuffle after 36 rounds thus defending against card counting. This is more likely to work in live casinos.
The first step is to assign a value to every card. From 2 to 6: +1, from 7 to 9: 0, from 10 to Ace: 1.
Keep in mind or write down the total value of the round. For instance, the total value of the following table is 0.
Here it is +1
The more cards that come out before shuffling the easier it is to estimate upcoming cards and thus, we can increase or decrease the bet to increase winnings or decrease losses. If the calculated number is positive then our advantage increases, if it is negative then it decreases.
Nonexhaustive list of further counting strategies.
Card strategy  2  3  4  5  6  7  8  9  10,J,Q,K  A 
HILo  +1  +1  +1  +1  +1  0  0  0  1  1 
Hiopt I  0  +1  +1  +1  +1  0  0  0  1  0 
Hiopt II  +1  +1  +2  +2  +1  +1  0  0  1  0 
KO  +1  +1  +1  +1  +1  +1  0  0  1  1 
Omega II  +1  +1  +2  +2  +2  +1  0  1  2  0 
Red 7  +1  +1  +1  +1  +1  0 or +1  0  0  1  1 
Halves  +0.5  +1  +1  +1.5  +1  +0.5  0  0.5  1  1 
Zen Count  +1  +1  +2  +2  +2  +1  0  0  2 
1 
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