These may have worked years ago when the number of decks was small, but are of little value today and can only give you a slight edge at best.

I mention this so you will not waste your time and money on card counting methods. Further, some of the casinos use shoes that constantly shuffle the cards. Most casinos use a multiple deck shoe which can hold up to eight decks of cards. For the most part the rules for playing are pretty much the same all over. Blackjack or twenty-one as it is sometimes called is played in casinos all over the world including online casinos.