The basic aim of Blackjack is to get a card value as close to 21 as possible without going over. Cards are worth their face value (e.g. 6 is worth 6), all face cards are worth 10 and an ace can be worth either 1 or 11 - the player decides which.
Blackjack is a score of 21 from your initial two cards (i.e. an ace and a face card or a ten). Blackjack is unbeatable and will give the player a higher payout.
After betting, a player is initially dealt two cards per hand - you can then choose to 'hit', 'stand, 'double' or 'split'. A hit will deal another card that will add to your hand's current total. If you go over 21 the hand will go bust and lost your bet.
Stand will leave the hand on it current total.
Double will double your bet on the hand, then hit once (take one card) and then stand. You can only double down on two cards. A Split is only possible if you're dealt two cards of the same value, creating two new hands with each card.
Insurance - If the dealer is showing an ace face-up and the player does not have Blackjack they are offered an insurance bet, which costs half the original bet over again. If the player takes insurance and the dealer has Blackjack, they win the insurance bet, thereby breaking even on the hand. If the player is showing an ace face-up and the player had Blackjack they are offered Even Money instead. If accepted, the player wins the hand at evens no matter what the dealer has. If not accepted, and the dealer has Blackjack, the outcome is a push. If not accepted and the dealer does not have Blackjack, they win the normal 3:2.
Rules - A player can double on any two cards before splitting. Splitting, doubling after split, and splitting aces are all allowed. However, re-splitting is not allowed and the player can hit but not double after splitting aces. Only an initial deal of 21 counts as Blackjack. Blackjack payout is 3:2. Players cannot surrender a hand. The dealer will not hit on soft 17 or higher. The dealer only peaks on an ace. 8 decks are used in Pro Blackjack.