The RoboCup 2D Simulated Soccer League is the oldest of the RoboCup Soccer Simulation Leagues. It consists of a number of competitions with computer simulated soccer matches as the main event. There are no physical robots in this league but spectators can watch the action on a large screen, which looks like a giant computer game. Each simulated robot player may have its own play strategy and characteristic and every simulated team actually consists of a collection of programs. Many computers are networked together in order for this competition to take place.