Overview and Roadmap.- Overview of RoboCup 2003 Competition and Conferences.- RoboCup: Yesterday, Today, and Tomorrow Workshop of the Executive Committee in Blaubeuren, October 2003.- Invited Papers.- Challenges in Robust Situation Recognition through Information Fusion for Mission Criticial Multi-agent Systems.- On Role Allocation in RoboCup.- On the Role of Quantitative Descriptions of Behaviour in Mobile Robotics Research.- Technical Papers.- Complexity Science and Representation in Robot Soccer.- Recognition and Prediction of Motion Situations Based on a Qualitative Motion Description.- Evaluating Team Performance at the Edge of Chaos.- Hidden Markov Modeling of Team-Play Synchronization.- Designing Agent Behavior with the Extensible Agent Behavior Specification Language XABSL.- Feature-Based Declarative Opponent-Modelling.- Scenario-Based Teamworking, How to Learn, Create, and Teach Complex Plans?.- Specifying Agent Behaviors with UML Statecharts and StatEdit.- Echo State Networks for Mobile Robot Modeling and Control.- Model and Behavior-Based Robotic Goalkeeper.- Evolving Visual Object Recognition for Legged Robots.- Coaching Advice and Adaptation.- Technical Solutions of TsinghuAeolus for Robotic Soccer.- A Real-Time Auto-Adjusting Vision System for Robotic Soccer.- Knowledge-Based Autonomous Dynamic Colour Calibration.- Playing Robot Soccer under Natural Light: A Case Study.- Tracking Regions.- Fast and Robust Edge-Based Localization in the Sony Four-Legged Robot League.- A Symmetry Operator and Its Application to the RoboCup.- RoboCup as an Introduction to CS Research.- RoboCup in Higher Education: A Preliminary Report.- Scaffolding Childrens Robot Building and Programming Activities.- Planning Trajectories in Dynamic Environments Using a Gradient Method.- Local Multiresolution Path Planning.- A Humanoid Approaches to the Goal Reinforcement Learning Based on Rhythmic Walking Parameters.- Design of Walking Gaits for Tao-Pie-Pie, a Small Humanoid Robot.- lƒ}