Ten Simple Blackjack Strategies\n\n RULE #1: ALWAYS DOUBLE DOWN ON 11, UNLESS THE DEALER SHOWS AN ACE. RULE #2: WHEN THE DEALER'S UPCARD IS 2-9, ALWAYS DOUBLE DOWN ON AN INITIAL SCORE OF TEN. RULE #3: WHEN THE DEALER'S UPCARD IS A 5 OR 6, ALWAYS DOUBLE DOWN ON A SOFT 13-18. RULE #4: ALWAYS SPLIT ACES AND ALWAYS SPLIT ...