Casinos think they can stop skilled gamblers from eking out a tiny edge at blackjack. Is that a losing bet? Zachary Crockett doubles down. SOURCES:"Ben," former professional card counter.Bill Zender, co-founder of Bill Zender and Associates casino consulting firm. RESOURCES:"Blackjack Player Sues Ameristar Casino, City of Black Hawk Over Alleged Detainment for Card Counting," by Megan Ulu-Lani Boyanton (The Denver Post, 2023)."Why Does the House Always Win? A Look at Casino Profitability," by J. B. Maverick (Investopedia, 2023)."Counting the Cost," by Bill Zender (GGB News, 2022)."Nevada Supreme Court Orders Casino To Pay Card Counter," by I. Nelson Rose (Gambling and the Law, 2017)."Counting Cards Is Legal, But ..." by Mark Pilarski (Detroit Free Press, 2016)."Card Counter Sues Planet Hollywood Over Detention, Confiscated Casino Chips," by Carri Geer Thevenot (Las Vegas Review-Journal, 2015)."Real People Behind Story of '21' Discuss Film's Facts," by Ed Symkus (The State Journal-Register, 2008).Blackbelt in Blackjack: Playing 21 as a Martial Art, by Arnold Snyder (1997). EXTRAS:"How to Make Your Own Luck," by Freakonomics Radio (2020)."The Economics of Sports Gambling (Replay)," by Freakonomics Radio (2020)."Could the Next Brooklyn Be … Las Vegas?!" by Freakonomics Radio (2015).21, film by Robert Luketic (2008).