The most important thing to know about blackjack is the basic strategy. This strategy is simply the best way to play every possible situation, without any knowledge of the distribution of the rest of the cards in the deck. Following is the basic strategy for four of more decks when the dealer stands on soft 17. Links are also provided to more basic strategy charts for other rules. However the most common game is the multiple deck game (4 or more decks) where the dealer stands on soft 17. If you only memorize one table we would suggest the one below. It can be played effectively under any rules.

To use the basic strategy look up your hand along the left vertical edge and the dealer's up card along the top. In both cases an A stands for ace. From top to bottom are the hard totals, soft totals, and splittable hands. Rule variations can have an effect on some borderline situations. The most flexible rules are the number of decks, whether the dealer hits or stands on a soft 17, and whether doubling is allowed after splitting.

Key to table:

H

Hit

S

Stand

D

Double if allowed, otherwise hit

Ds

Double if allowed, otherwise stand

P

Split

H/P

Split if allowed to double after a split, otherwise hit

H/R

Surrender if allowed, otherwise hit

Some obvious situations have been left out to keep the chart as small as possible. We have more basic strategy charts for other numbers of decks, as well as European blackjack.

• 1 deck
• 2 decks
• 4 or more decks
• European blackjack

The best way, we have found, to memorize the basic strategy is notice patterns and to try to understand why you should play every situation as the chart says. Then make flash cards and go over and over them until you know it cold. Do not deal out cards to yourself because the soft totals and the pairs will not occur often enough to test your knowledge.

Many people do not believe in the basic strategy because they once took the advice of someone who knew it and then lost the hand. Let me make something perfectly clear, you will not win every hand with the basic strategy! In fact you won't even win half your hands. However we can personally testify that while you will have short term ups and downs over the long run you will roughly break even using it.

In European blackjack and in many online casinos the dealer does not check for a blackjack after dealing the cards. This is referred to as the "no-peek" rule, because the dealer doesn't peek to see if he has a blackjack. In this case, after the players have played their hands, if the dealer does have a blackjack, then the player loses the full amount bet, including the additional bet if the player doubled or split. This rule necessitates some adjustment in the basic strategy which is explained in more detail in online casino appendix.

Never bust: For analysis of this strategy we assumed the player would never hit a hard 12 or more and based all other decisions on maximizing expected value under this assumption. This results in a house edge of 3.91%.

Mimic the dealer: For analysis of this strategy we assumed the player would always hit 16 or less and stand on 17 or more. The player as well as dealer stood on soft 17. The player never doubled or split, since the dealer is not allowed to do so. This results in a house edge of 5.48%.

Assume ten in the hole: For this strategy we first figured out the optimal basic strategy under this assumption. If the dealer had an ace up we reverted to the proper basic strategy assumption of assuming the dealer did not have a ten. Then we went back and used this strategy under regular playing conditions. This results in a house edge of 10.03%.

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