Different visitors in the Quantum Chemistry group at the Rijksuniversiteit Groningen have made a really important contribution to research, thanks to the collaboration with the head of the group (Prof. Remco Havenith) and also the help of the origin groups of some of the students. This story shows how collaborations can actually span over 4 different countries and keep connected via the Dutch national supercomputing systems and the group of Prof. Havenith.