After this, the dealer starts dealing the first two rounds of cards. Usually, the game starts with the player placing the regular blackjack bet and then he may choose to place a Perfect Pair bet. For example, at some casinos players can double on any given hand, while at some the player can only double on 9-11. Some game variations differ in the doubling options the player has. The game can be played with two, four and five decks of 52 cards and the dealer always stands on soft 17. This is one of the blackjack variations that have the normal blackjack rules, spiced up with the possibility of placing Perfect Pairs side bet.