Boxing uses generally a ten point "must" system. If you win the round you get 10 pts, the loser gets 9. If you lose big in the rd or are knocked down, the loser gets 8 or sometimes 7 with 2 knockdowns. A tied rd gets each 10, if you get a penalty you lose one point off what you would've gotten. Three judges grade each round, winner is the one who wins on at least two of the three scorecards at the end (if no knockout obviously).