Blackjack Basic Strategy Explained: The Chart That Cuts the House Edge to 0.5% Most casino games don't give you a way to fight back. Blackjack does. With the right strategy, you can shrink the house edge to as low as 0.5%, which makes it one of the best bets on the entire floor. The key is a tool called the basic strategy chart, and once you understand how to use it, you'll never look at the game the same way again.