With Blackjack the player is set against the dealer. Unlike in the game of Roulette, the player does have some control over the game as they have options after their hand has been dealt. The player can either ‘hit’ to take an additional card if their starting cards are quite low, ‘stand’ if they think the two cards they have are enough, or ‘double’ if they have a middle hand and feel only one card is required to get closer to 21.
There is a fundamental blackjack strategy card that is available to all players, and most casinos will allow these cards to be referred to. It provides a basic set of guidelines on what to do when certain card combinations are dealt.
There are also actions that should be taken depending on the card that is being shown by the dealer, as this can have a bearing on a player’s actions. For example, there will be some hands where a dealer will have a low card and so will need to draw a third. This will increase the possibility of the dealer’s hand going over 21.
The choice of insurance when a dealer shows an ace is really up to the player. Having a total of 16 cards that can make Blackjack in a single deck means there is around a 30% chance that the dealer has the card needed.
Knowing the best thing to do with any given two-card hand will ultimately reduce the house advantage so that a player will win more often than if they were simply deciding on an action randomly.