Dear all, My name is Javier Ramiro Poveda Figueroa, PhD candidate in history of science at Universitat Autonoma de Barcelona. I am interested in the study of history and philosophy of computing from the 1930s until the 1990s. I am researching in the relationship between early computing games like chess and checkers with microworlds. For that reason, I am searching literature that can help me to understand whether microworlds and early computing games have are related or not. I would like to know if you have any information about the problem I am working with. Your help will be valuable. Kind regards, Javier Poveda Figueroa.