Chess boxing an alternative to traditional roles. A chessboxing fight consists of 11 rounds, 6 rounds of chess and 5 rounds of boxing, and a victory in either chess or boxing wins and ends the entire contest. Chess and boxing rounds alternate, a full-distance contest begins and ends with a round of chess. Each round lasts three minutes, regardless of whether it involves chess or boxing. A single chess game is played over the six chess rounds. These total 18 minutes; each player is subject to a time control of 9 minutes with no increment to make all their moves (blitz chess).
Olympic sports dropped from the Olympics since 1936 are baseball and softball, which were both voted out by the IOC Session in Singapore on July 11, 2005, a decision that was reaffirmed on February 9, 2006. These sports were last included in 2008, although officially they remain recognized as Olympic sports in the Olympic Charter. Therefore, the number of sports in the 2012 Summer Olympics was dropped from 28 to 26. Following the addition of women's boxing in 2012, and women's ski jumping in 2014, there are only Greco-Roman wrestling and nordic combined, respectively, that are only for men in those games.