The rules will be similar to the usual rules of the IPT (see IPT website: that in short are also presented here on the website of the GPT (

For example, there is a simplification on what problems can be challenged: Each team has to announce which problems it has worked on (probably at least one problem per participant). Only these problems can be challenged by other teams and the team can only report on the problems that it has announced. Therefore, to participate, it is sufficient if every participant works on one problem.

Furthermore, participants of the Online-GPT 2020 are allowed to present their problem again in the physics fights of a qualifying GPT in 2021 (with a maximum of two Online-GPT-problems per team).

Based on the experiences with the Online-GPT 2020 further modifications have been implemented: First, in the first physics fights the role of a reviewer will be skipped in order to speed up the physics fights. In the final the role of a reviewer will still be used. Second, technical timeouts are introduced.

The rules of the GPT 2021 and 2022 can be downloaded here or below.