See related story: Who's Holding the Aces Now?
Slideshow: Who's Holding the Aces Now?
Card counters have been the bane of casinos for years, and the methods used to track them are terribly imprecise. New technology zeroes in on the counter, even though it's not supposed to be used that way. By Daniel Terdiman.
An El Dorado casino dealer sets up a blackjack game at a MindPlay MP21 table. The high-tech system can help casinos spot card counters.Courtesy of MindPlay

