The high-low card counting method is the most commonly used type because of how easy it is to use and is most especially used by blackjack teams. The Hi-Lo strategy is very easy to use by both novices and more advanced players. The Hi-Lo system was first invented by the mathematician Harvey Dubner and later improved by Professor Edward Throp, who was one of the founding fathers of card counting strategy. Other names for this style are also known as High-Low or Plus-Minus card counting. The Hi-Lo card counting style is one of the most well known of them all. Basic Strategy MIT Card Counting Team Cheating at Blackjack Betting Systems Professional Player Profiles Shuffle Tracking Dealer Tells Kelly Criterion