Blackjack is a game of cards where cards one to ten are given value equivalent to face value and all the colored cards are given a value of ten. Aces can have the value of one or eleven. Players are dealt cards and they have to play against the dealer’s cards. A player must have the highest total value of cards without exceeding twenty-one to win.
Most tables have the dealer stand on an all seventeen. Unless, you have the card total of less than twelve, do not hit indiscriminately. If you have a card total of seventeen or higher, stand. The higher the card value, the more the chances of busting if you hit, but do not let this scare you into standing up too soon; if the dealer stands on a soft seventeen, hit until a hard sixteen and then quit. You will have better chances of winning.
Now that you know a little about basic strategy, know that card values of 1 to 16 should always be taken as decision hands where you must decide for yourself if you want to hit or stand. As previously mentioned, if your card count exceeds seventeen, stand.
The best blackjack strategy ever developed according to the analyst and writer Ed Thorp is the Baldwin group strategy developed in 1956 by Baldwin, Cantey, Maisel, and McDermott. He claims that a player following the Baldwin group strategy has an edge of about +0.1%, which is the best odds a player can have against the house.
There are other non-mathematical strategies developed by other expert players that give good odds, but these are hard to outline, or indeed, to master.
If you are playing at a real (brick and mortar) casino, know that the card decks are not shuffled after each game nor are the cards from the previous game added to the card decks. Thus, you can keep track of the cards missing from the card decks (from all the previous plays that happened after the last reshuffling) and speculate which cards may never show face up on the table, and thus improve your strategy. Needless to say, this does not affect your play at an online casino as the electronic card decks can repeat the cards dealt.
Generally, to calculate odds for or against the players, the dealt cards are each assigned a point value. If the card favors the player, it is assigned a positive card value and if it favors the casino, it is assigned a negative card value. The odds are then calculated as the percentage (positive or negative) against the total outcomes as either favorable or non-favorable odds.
All these calculations work if the game is fair and the dealer is honest. If the dealer cheats and hands out seconds every so often, you might still lose. Know that the sound of the dealing of second from top card sounds quite different from the sound of the dealing of the first card on top. If you are lucky enough to notice it, point it out; you might just help everyone at the table; they may not like playing against a dishonest dealer either.