What tournament is annually held in Las Vegas since the 1970s?
World Series of Poker The World Series of Poker (WSOP) is a series of poker tournaments held annually in Las Vegas and, since 2005, sponsored by Caesars Entertainment Corporation (known as Harrah's Entertainment until 2010). It dates its origins to 1970, when Benny Binion invited seven of the best-known poker players to the Horseshoe Casino for a single tournament, with a set start and stop time, and a winner determined by a secret ballot of the seven players.
1972 World Series of Poker The 1972 World Series of Poker (WSOP) was a series of poker tournaments held during early May 1972 at the Binion's Horseshoe in Las Vegas, Nevada. It was the third annual installment of the World Series of Poker, and also the second one to feature the freezeout structure. In comparison with the previous year's series, the number of events was cut back and the buy-ins were raised, resulting in one preliminary event and the Main Event both having the same buy-in of $10,000 (equals about $54,000 in 2011 U.S. dollars). The preliminary event featured five-card stud poker and was won by Bill Boyd, the same man who won the 1971 five-card stud preliminary event. The previous years' double champion Johnny Moss was defeated early in the main event and Thomas "Amarillo Slim" Preston went on to win the tournament after a series of deals.