The player is entitled to Free Split and Free Double on both hands. This way, if a player is dealt a pair of 7s, their first split is free. If they are dealt another 7, they can re-split for free. If the player is dealt a 4 to make 11 in one of the splits, they can also double down for free. Blackjack (also known as twenty-one) is one of (if not) the most popular casino games in the world. It is a card game that is played between the player and the dealer. There can be many players around a tabl