Judges in matches record scoring blows by pressing a button for either the red or Blue fighter depending on which corner he is assigned to. A computer then sum up the scoring blows and the scores is calculated. The system itself is extremely accurate in the infinite majority of cases. Three of the four judges must record a scoring blow within one second of each other for it to be added up. And finally one who leads with the number of blow will be announced as the winner of the fight for the match.