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was a Norwegian-Italian [[Psychology:Category:Psychologist|psychologist]] and mathematician. He did early computer-assisted experiments in [https://en.wikipedia.org/wiki/Symbiogenesis symbiogenesis] and [[Genetic Programming#EvolutionaryAlgorithms|evolutionary algorithms]], considered pioneering in [https://en.wikipedia.org/wiki/Artificial_life artificial life] research. In the 50s he thought about to write a chess program to test evolutionary theories, and implemented a program in collaboration with [[Alex Bell]], who wrote a fast legal move generator, in the early 60s. In 1974, while he researched at the [https://en.wikipedia.org/wiki/University_of_Oslo University of Oslo], he participated at the [[WCCC 1974|First World Computer Chess Championship]] in Stockholm with his own chess program [[Freedom]] <ref>[https://www.game-ai-forum.org/icga-tournaments/person.php?id=493 Nils Barricelli's ICGA Tournaments]</ref>.