Chess boxing, or chessboxing, is a hybrid sport that combines two traditional disciplines: chess and boxing. Two combatants play alternating rounds of blitz chess and boxing until one wins by checkmate or knockout. It is also possible to win by time penalty as in normal chess, and by boxing decision if there is a draw in the chess round.

Terry Marsh is an English former professional boxer who was an undefeated world champion in the light welterweight division.