Alexander Alexandrovich Alekhine was the fourth World Chess Champion. He is often considered one of the greatest chess players ever.
By the age of 22, he was already among the strongest 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 José Raúl Capablanca, who was widely considered invincible.
In the early 1930s, Alekhine dominated tournament play and won two top-class tournaments by large margins. He also played first board for France in five Chess Olympiads, winning individual prizes in each. Alekhine offered Capablanca a rematch on the same demanding terms that Capablanca had set for him, and negotiations dragged on for years without making much progress. Meanwhile, Alekhine defended his title with ease against Bogoljubov in 1929 and 1934. He was defeated by Euwe in 1935, but regained his crown in the 1937 rematch. His tournament record, however, remained uneven, and rising young stars like Keres, Fine, and Botvinnik threatened his title. Negotiations for a title match with Keres or Botvinnik were halted by the outbreak of World War II in Europe in 1939.