The referee issues a yellow card to a robot player during the final of the Middle Size League. [Photo by Zhu Lixin/ China Daily]

Beijing Information Science and Technology University overcame warnings from the referee to defeat Eindhoven University of Technology from the Netherlands in the Middle Size League final at the 19th RoboCup World Championships in Hefei, capital of East China's Anhui province on Wednesday.

A total 175 teams from 47 countries and regions took part in the five-day event.

Both finalists were shown yellow cards as their machines collided with opponents harder than necessary.