Get closer to 21 than the dealer without going over.
2-10 = face value, J/Q/K = 10, A = 1 or 11 (your choice).
Dealer stands on all 17s (hard and soft).
Split up to 5 times (6 hands max). Aces can be split - each Ace hand gets one card and stands.
Blackjack pays 3:2, regular win pays 1:1, push returns bet.