Whenever you can, play where the rules are best. Some casinos even allow players to double down after splitting a pair. Most casinos allow you to double down on any two cards, while some casinos limit your doubling to hands that total 10 or 11. When you double down, you get to double your original wager in exchange for a single card. Unfortunately, this isn’t available at every table in some casinos. However, players can get the best returns when allowed to both split and then double down on hands. Splitting and doubling down blackjack hands at the right time always smart.