Advanced blackjack strategies aim to improve a player's chances by using methods like card counting, betting systems, and bankroll management techniques. Card counting, for example, involves tracking the ratio of high to low cards in the deck to adjust bet sizes accordingly. When the count favors the player, they increase their bets, and when it favors the house, they reduce them. Some players combine this with a "bet spread," adjusting bets based on the count. Other systems like the 1-3-2-6 or Paroli focus on progressive betting after wins, while flat betting maintains a consistent bet size regardless of outcomes.