Casino rules can have a significant impact on Blackjack strategy by altering the odds and the best ways to play. For example, the number of decks used changes the likelihood of certain cards being dealt, with single-deck games offering better odds for players. Rules on whether the dealer must hit or stand on soft 17 can affect the house edge and the player's decisions. Restrictions on doubling down and splitting pairs, such as limiting the hands on which doubling is allowed or whether aces can be re-split, also influence strategy. Additionally, some casinos offer the surrender option, which can be valuable in certain situations, while others may have unfavorable rules for insurance or Blackjack payouts. For instance, a 6:5 payout for Blackjack increases the house edge and requires players to play more conservatively. Understanding these rule variations is crucial for adjusting strategy to minimize the house advantage and maximize your chances of success.