The College Football Playoff (CFP) is an annual postseason knockout invitational tournament to determine a national champion for the National Collegiate Athletic Association (NCAA) Division I Football Bowl Subdivision (FBS), the highest level of college football competition in the United States. Four teams play in two semifinal games, and the winner of each semifinal advances to the College Football Playoff National Championship game. The inaugural tournament was held at the end of the 2014 NCAA Division I FBS football season and was won by the Ohio State Buckeyes, who defeated the Oregon Ducks in the championship game. After the first season, the playoff was dominated for several years by two teams, the Alabama Crimson Tide and the Clemson Tigers; they faced each other in the championship game three times, and in one other year they met in the semifinals. A 13-member committee selects and seeds the four teams to take part in the CFP. This system differs from the use of polls or computer rankings that had previously been used to select the participants for the Bowl Championship Series (BCS), the title system used in FBS from 1998 to 2013. The current format is a Plus-One system, an idea which became popular as an alternative to the BCS after the 2003 and 2004 seasons ended in controversy. The two semifinal games rotate among six major bowl games, referred to as the New Year's Six: the Rose Bowl, Sugar Bowl, Orange Bowl, Cotton Bowl, Fiesta Bowl, and Peach Bowl. In addition to the four teams selected for the playoff, the final CFP rankings are used to help determine the participants for the other four New Year's Six bowls that are not hosting the semifinals that year. The semifinal games, which take place on the same day, are usually scheduled on Friday, Saturday, or Monday close to or on New Years Day, with flexibility allowed to ensure that they are not in conflict with other bowl games traditionally held on New Year's Day. The National Championship game is then played on the first Monday that is six or more days after the semifinals. The venue of the championship game is selected based on bids submitted by cities, similar to the Super Bowl or NCAA Final Four. The winner of the game is awarded the College Football Playoff National Championship Trophy. Playoff officials commissioned a new trophy that was unconnected with the previous championship systems, such as the AFCA "crystal football" trophy which had been regularly presented after the championship game since the 1990s (as the AFCA was contractually obligated to name the BCS champion as the Coaches Poll champion). As the NCAA does not organize or award an official national championship for FBS football (instead merely recognizing the decisions made by any of a number of independent major championship selectors), the CFP's inception in 2014 marked the first time a major national championship selector in college football was able to determine their champion by using a bracket competition.