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.
1985 Super Bowl of Poker
The Super Bowl of Poker (also known as Amarillo Slim's Super Bowl of Poker or SBOP) was the second most prestigious poker tournament in the world during the 1980s. While the World Series of Poker was already drawing larger crowds as more and more amateurs sought it out, the SBOP "was an affair limited almost exclusively to pros and hard-core amateurs."