Who was the first perons to use Artificial Intelligence[on a computer]?

Answer 1

"In 1951, using the Ferranti Mark I machine of the University of Manchester: Christopher Strachey wrote a checkers program and Dietrich Prinz wrote one for chess. Arthur Samuel's checkers program eventually achieved sufficient skill to challenge a world champion."

"The field was born at a conference on the campus of Dartmouth College in the summer of 1956. Those who attended would be become the leaders of AI research for many decades, especially John McCarthy, Marvin Minsky, Allen Newell and Herbert Simon, who founded AI laboratories at MIT, CMU and Stanford."