Petrosian

Tigran Petrosian won the 1962 Candidates Tournament, the competition that selected the next challenger for the world champion. He defeated Mikhail Botvinnik in 1963 to become the ninth world champion. He defended the title in 1966 and lost it in 1969, both times facing Boris Spassky.

Petrosian is often called a defensive player, but that label can be misleading. He played positional chess, focusing on piece placement, pawn structure, and advantages that last rather than immediate attacks. He also excelled at prophylaxis: recognizing what an opponent intended to do and removing the possibility before it became a concrete threat.

This kind of defense was not passive waiting. Petrosian sometimes allowed an opponent to advance, then attacked the weaknesses that the advance had created. Beyond his reign, he appeared in eight Candidates cycles and represented the Soviet Union in ten Olympiads. His career shows how prevention, patience, and tactical calculation can belong to the same style.