Blackjack is undeniably the most popular casino card game in the world, renowned for its low house edge and strategic depth.

These minor rule changes might seem insignificant, but they drastically alter how you should play certain hands.

The Biggest Difference: No Hole Card

In the European variation, the dealer only receives one face-up card at the beginning of the round.

Because the dealer doesn’t check for blackjack, you risk losing your original bet PLUS any money you spent splitting or doubling down if the dealer eventually draws a 21.

• European blackjack is traditionally dealt from a ‘shoe’ containing only two standard decks of cards, which is great for card counters
• Because only two decks are used, the math regarding the remaining cards changes slightly compared to an eight-deck game
• The dealer must always stand on a ‘Soft 17’ (an Ace and a 6) in the European version, which is a highly favorable rule for the player

European Rules on Doubling Down

American casinos generally allow you to double down on any two starting cards, giving you maximum strategic flexibility.

You are typically only allowed to split a pair once, meaning you cannot re-split if you are dealt a third identical card.

While the restrictions seem harsh, the use of fewer decks and the ‘Stand on Soft 17’ rule help keep the house edge very low.