Heavyweight unification series Heavyweight unification series The heavyweight unification series, also known as the Heavyweight World Series, was a sequence of professional boxing matches held in 1986 and 1987 to crown an undisputed champion of the heavyweight class. The series was produced by HBO Sports and promoted by Don King. It ended with Mike Tyson as undisputed champion, holding the championship belts of the International Boxing Federation, World Boxing Association, and World Boxing Council. Prior to the series, the last undisputed heavyweight champion had been Leon Spinks, who won the championship in his 1978 victory over Muhammad Ali. Spinks had been stripped of
Chess boxing Chess Boxing Organisation (WCBO) that was founded in Berlin shortly before. Dutch middleweight fighters Iepe Rubingh and Jean Louis Veenstra faced each other in the ring. After his opponent exceeded the chess time limit, Rubingh won the fight in the 11th round going down in the history books as the first ever World Chess Boxing Champion. The same goes for the Chess Boxing Club Berlin, created in the following year (2004), that is the first of its kind making Berlin the birthplace of chessboxing. Two years after the first world championship, the first European Chess Boxing Championship took place in