Online physics competition for high school and university students with short and challenging problems, intended to be more difficult than the problems of EuPhO, IPhO, and APhO.
European Physics Olympiad (EuPhO) is a contest for high school students. The concept of EuPhO is similar to real research situations, with short problems description and plenty of space for creative solutions.
The International Physics Olympiad (IPhO) is an annual physics competition for high school students. It is one of the International Science Olympiads. The first IPhO was held in Warsaw, Poland in 1967.
Other useful links:
A selection creative physics problems