Mikhail Botvinnik
On the basis of his strong results during and just after World War II, Botvinnik was one of five players to contest the World Chess Championship 1948, which was held at The Hague and Moscow. He won the tournament convincingly, with a score of 14/20, three points clear, becoming the sixth World Champion. Botvinnik then held the title, with two brief interruptions, for the next fifteen years, during which he played seven world championship matches.