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How did Emanuel Lasker use defensive play and psychology in chess?

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A chessboard showing the standard starting position for a game, with white and black pieces arranged in two rows on each side: rooks, knights, bishops, queen, and king on the back row, and pawns in front. — chess Position of chess pieces at the beginning of a game. The pieces are placed on the two ranks closest to the player. In the closest rank, pieces are arranged from left to right: rook, knight, bishop, queen, king, bishop, knight, and rook. In front of that rank, each square has a pawn.

Emanuel Lasker, who held the world chess championship from 1894 to 1921, revolutionized the game through his unique practical approach to defense and psychology.12

Defensive Play

Lasker refined the defensive theories established by his predecessor, Wilhelm Steinitz. He demonstrated that even positions that appeared cramped or structurally inferior often contained significant counterattacking potential. Rather than avoiding difficult positions, Lasker mastered them, finding ways to turn defensive struggles into opportunities for active play.2

Psychological Approach

Lasker was the first master to fully appreciate the psychological dimensions of the game. He frequently accepted positions with inferior pawn structures or perceived disadvantages to place a psychological burden on his opponents. By intentionally choosing these positions, he encouraged his opponents to become overly optimistic, often leading them to overextend or make errors under the pressure of trying to capitalize on their apparent advantage. This pragmatic, human-centric style allowed him to maintain his world title for 27 years, leaving many of his contemporaries to simply wonder at his success.2