Emanuel Lasker

Emanuel Lasker held the World Championship title for 27 years (1894-1921), a record for the longest reign. He was a profound thinker who approached chess as a struggle, often making psychologically challenging moves to unbalance opponents. A mathematician and philosopher, Lasker's play was pragmatic and adaptable. He successfully defended his title against formidable challengers like Siegbert Tarrasch and Frank Marshall.

His longevity at the summit, deep understanding of the competitive nature of the game, and success in other intellectual fields make him a unique and towering figure.