Blackjack, also known as 21, is a classic card game played in casinos around the world. In Luxembourg, the game is often played with 8 decks of cards and requires players to make correct decisions based on the cards they are dealt. The aim of the game is to have a higher score than the dealer without exceeding 21 points. Players are dealt two cards at the beginning of a round. The numerical value of the cards is either the number on the card or the value of 10 for face cards. One of the dealer's cards is face up and the other is face down. After the initial deal, players can make additional moves, such as hit, stand, split, double down, and surrender. The dealer must hit on a soft 17 and stand on a hard 17.