Online Blackjack Cheat Sheet

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Card Values

2-9 = as numbered

10’s, Jacks, Queens, Kings = 10

Ace - 1 or 11

Strategy Advice

  • Stand on 17 and above
  • Stand on soft 19 and 20
  • Hit on 12-16 against dealer 7 or more
  • Hit on 8 or below
  • Double on soft 13-18 if dealer has 4, 5 or 6
  • Double on 11 (except if dealer has Ace)
  • Double on 10 (especially if dealer has 9 or less)
  • Double on 9 if dealer has 6 or less.
  • Split 3’s and 2’s if dealer has 6 or less
  • Split 8’s and Aces
  • Never split 10’s and 5’s
  • Never take insurance

Card Counting Strategies

Hi-Lo Strategy:

Running count : 2-6= +1; 7,8,9 = 0; 10, J, K, Q = -1 True count: running count/number of decks

K-O strategy:

2-7 = +1; 8 and 9 = 0; 10, J, K, Q and Ace = -1.

Hi-Opt 1 strategy:

3-6 = +1; 2, 7, 8, 9 and Ace = 0; 10, J, K, Q = -1

Hi-Opt 2 strategy:

2,3,6,7 = +1; 4 and 5 = +2; 8 and 9 = 0; 10,J,K,Q = -2. Separate count of Aces, either as 0, or separately from the main count.

Hand value % of busting
21 100%
20 92%
19 85%
18 77%
17 69%
16 62%
15 58%
14 56%
13 39%
12 31%
11 or less 0%

Basic Strategy Chart

4+ Decks, Dealer Stands on Soft 17

Player options

H

Hit – take another card

S

Stand

DD

Double Down

P

Split

H/P

Split if you can double after split, otherwise hit

H/R

Surrender if allowed, otherwise hit

Useful Links

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House Edge Calculator
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