Alexander Alekhine (October 31, 1892 – March 24, 1946) was the fourth World Chess Champion. At the age of twenty-two he was already among the best chess players in the world. During the 1920s, he won most of the tournaments in which he played. In 1927, he became the fourth World Chess Champion by defeating Capablanca, widely considered invincible, in one of the longest matches ever held up until that time. He held the title until 1935, and then won again in 1937. Several openings are named after Alekhine, the most famous being the Alekhine’s Defence which is still used at the top levels of chess today. Source: Alexander Alekhine's Chess Biography on Wikipedia.