The distance (boxing) 19, 1987. While the International Boxing Federation, which had recently broken away from the WBA, continued to hold onto the position there was no documented medical evidence to show a 15-round fight is more dangerous than a 12-round fight, they eventually voted to shorten their championship distance to 12 rounds as well on June 3, 1988. The last heavyweight 15-rounder title fight was on October 16, 1987 between Mike Tyson and Tyrell Biggs. The last middleweight 15-rounder title fight was a World Boxing Board title match on June 7, 1997 in which Jose Alfredo Flores won a split decision over
Chess boxing After each chess round, the exact setup is digitally recorded and then repositioned before the following chess round. The breaks between the chess and boxing rounds usually last 60 seconds. The duration of the rounds and overall fight time in amateur chessboxing fights can change to some degree, as in for example youth tournaments and exhibition fights. A chessboxing match can end by any of the following: In the case that neither of the chessboxers win in regulation time and the chess game ends in a draw, the fighter who is ahead on boxing points wins the overall bout. In