The 1970 World Series of Poker (WSOP) was first held on May 8, 1970. Unlike the WSOP events that followed it, which are decided using a freeze-out tournament, the 1970 champion was decided from a vote by the players. Jack Binion invited the best seven poker players in America to his Binion's Horseshoe casino in Las Vegas, Nevada to decide who was America's best poker player.