Tigran Vartanovich Petrosian vs Mikhail Botvinnik - Botvinnik - Petrosian World Championship Match 1963.04.22
Tigran Vartanovich Petrosian vs Mikhail Botvinnik
Botvinnik - Petrosian World Championship Match Moscow URS round 13 1963.04.22
Queen’s Indian Defense: Anti-Queen’s Indian System 1/2-1/2